CN109072330A - Heat-treating methods for metal parts - Google Patents
Heat-treating methods for metal parts Download PDFInfo
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- CN109072330A CN109072330A CN201780008164.0A CN201780008164A CN109072330A CN 109072330 A CN109072330 A CN 109072330A CN 201780008164 A CN201780008164 A CN 201780008164A CN 109072330 A CN109072330 A CN 109072330A
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- component
- subregion
- temperature
- smelting furnace
- nozzle
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/673—Quenching devices for die quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/84—Controlled slow cooling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2221/00—Treating localised areas of an article
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The present invention relates to a kind of methods for heat-treated metal component.The present invention is more particularly directed to the applications in the partially hardened of optional precoated shet component made of high-intensitive manganese-boron steel.In the method, at least one first subregion (2) of component (1) is cooling by least one nozzle (3) convection current, fluid stream (4) is discharged into the first subregion (2) and makes that at least temperature difference of 100K (5) is arranged between at least one first subregion (2) and at least one second subregion (6) of component (1) by it, and wherein at least one nozzle (3) is operated with the superpressure of at least 2bar.
Description
The present invention relates to a kind of methods for heat-treated metal component.Particularly, the present invention is by high-intensitive manganese-boron steel
It is used during the partially hardened of manufactured optional precoated shet component.To produce the safety-related car body component made of steel plate,
It is generally necessary to while steel plate forms car body component or later harden steel plate.For this purpose, being known as the heat treatment of " die quenching "
Method has built up.In this process, the steel plate provided usually in the form of blank heats in a furnace first, is then pressing
It is cooling in molding operation in power machine, to make its hardening.For many years, people have been working hard using die quenching and mention
For the car body component of motor vehicles, such as A column and B column, interior side door crash bar, frame unit, bumper, is used for foot pedal
The crossbeam and forward and backward stringer of vehicle body and roof, these have different intensity in all subregion, allow car body component portion
Fulfil different functions with dividing.For example, the central area of B pillar should have high intensity, to protect when side collision occurs
Protect occupant.Meanwhile the end regions up and down of B column should have lower intensity, so that deformation energy can be absorbed in side collision, together
When can easily be connected to other car body components during B column is installed.
In order to manufacture the car body component of this partially hardened, the component of hardening must have different materials in all subregion
Expect micro-structure or strength characteristics.In order to which different material microstructure or strength characteristics are arranged after curing, for example, steel to be hardened
Plate may have been provided with different sheet material portions, be connected to each other or can partially cool down to some extent in a press.
Alternatively or additionally, before cooling in a press and forming step, can choose make it is to be hardened
Steel plate carries out the different heat treatment process in part.In this respect, for example, all subregion of steel plate to be hardened can be heated only, wherein
Transformation towards harder micro-structure (such as martensite) will be realized.However, this technology controlling and process usually has the disadvantage that,
I.e. coating is inwardly spread, and is usually applied to surface of steel plate to prevent fouling, such as aluminium silicon coating, cannot be effectively integrated into heat
In treatment process.Additionally, there are the selection for carrying out local heat treatmet by contact plate, contact plate is designed to pass through heat-conduction part
Divide the temperature of ground control steel plate.However, this needs to have certain time of contact with plate, this can usually be realized than downstream pressure machine
(minimum) circulation time it is long.In addition, in molding, the coordination between certain time of contact and circulation time usually make by
Corresponding temperature control station, which is integrated into plant-scale die quenching production line, becomes more difficult, the production wave in operating process
It is dynamic to be usually inevitable.
Based on this, the purpose of the present invention is at least be partially solved about description of the prior art.Especially, it mentions
For a kind of method for heat-treated metal component, allow to carry out the different heat treatment in the part of component on an industrial scale, and
And it especially carries out as efficiently as possible.In addition, this method is particularly useful to reduce the heat treatment process for being located at press machine upstream
Influence of the procedure segment to circulation time of entire heat treatment process.
These purposes are realized by the feature of independent claims.It describes in the dependent claims disclosed herein
Other Advantageous embodiments of solution.It should be noted that the feature individually listed in dependent claims can be to appoint
Meaning, technically significant mode is combined with each other, and further limits embodiments of the present invention.In addition, claims
Described in feature specified and explained in more detail in the description, wherein present more preferable embodiment of the invention.
According to the present invention, in (part different) heat treatment method for metal parts, component at least one first
Subregion (it has more ductility in the component handled completely) passes through at least one spray to the first subregion exhaust fluid stream
Mouth convection current is cooling, so that being arranged at least between at least one first subregion and at least one second subregion of the component
The temperature difference (it is relatively hard in the component handled completely) of 100K [Kelvin], wherein at least one nozzle is at least 2bar's
Direct draught operation.
Disclosed method is used in particular for the target component region specific heat treatment of (steel) component or each son in steel part
Different micro-structures is set in a targeted way in region.Preferably, this method is for partly hardening by (high intensity) manganese-boron steel
The component of manufactured optional precoated shet.
With a kind of particularly advantageous way, disclosed method makes even if at industrial scale can also be reliably to portion
Part carries out the different heat treatment in part.Especially, by least one nozzle for being operated under at least normal pressure of 2bar to portion
At least one first subregion of part is cooled down, and the operation stage pair of the heat treatment process positioned at press machine upstream can be reduced
The influence of the circulation time of entire heat treatment process.In other words, by operated under at least normal pressure of 2bar at least one
A nozzle can particularly advantageously allow the cooling of at least one the first subregion of component at least one first son of component
Region is rapidly cooled at least 100K, especially so rapidly makes to be less than or equal to downstream molding hardened tool cooling time
Circulation time (molding cycle).Especially when using fan, it is impossible to realize this short cooling time, fan can be used for producing
Raw (cooling) air stream towards parts surface.Preferably, by convection current or by nozzle cooling-part at least one first
The cooling time of subregion less than 15 seconds, especially less than 10 seconds or even less than 5 seconds, and particularly preferably less than 3 seconds.
Metal parts is preferably metal stock, steel plate or at least partly preforming semi-finished product.Metal parts preferably use or
It is made of (hardenable) steel, such as boron (manganese) steel, such as the steel of entitled 22MnB5.It is furthermore preferred that metal parts is extremely
It is few to be largely provided or be pre-coated with (metal) coating.For example, metal coating can be painting (mainly) comprising zinc
Layer, or the coating of (mainly) comprising aluminium and/or silicon, and especially so-called aluminium/silicon (Al/Si) coating.
At least one described nozzle is preferably provided in temperature control station, and wherein temperature control station is particularly preferably located at
The downstream of one smelting furnace and/or the second smelting furnace.At least one described nozzle, the especially outlet of nozzle can be towards the first sub-districts
Domain.In addition, at least one described nozzle, the especially entrance of nozzle, it may be connected to fluid source.Fluid source can be case,
The middle fluid for forming fluid stream stores in a compressed format.For example, fluid can be (compression) air, nitrogen gas and water or its mixing
Object.
Fluid is preferably compressed air and/or fluid stream is preferably (compression) air stream.At least one nozzle is preferably
At least one compressed-air atomizer.In other words, at least one nozzle is preferably operated with compressed air.It is empty in order to provide compression
Gas, the entrance of at least one nozzle, especially nozzle, it may be connected at least one compressor.It in other words, can be by extremely
A few compressor provides the compressed air at least 2bar positive pressure.In addition, the compressed air thus provided can be supplied to
At least one nozzle.This can be before through the cooling of at least one nozzle, simultaneously and/or at least partly carry out simultaneously.Such as
Fruit provides multiple nozzles, then can connect them to shared compressor.Preferably, compressor is provided and prepares for at least
One compressed-air atomizer supply has the compressed air of at least 2bar normal pressure.For this purpose, for example, compressor can provide
Positive (system) of at least 2bar is pressed, and is preferably kept available or is stored in pressure (or compressed air) reservoir.It is especially excellent
Selection of land, (appropriate) pressure accumlator are arranged in the pipe-line system for connecting the compressor at least one compressed-air atomizer
And/or it is connected in the pipe-line system between compressor and at least one compressed-air atomizer.In addition, at least one is movable
Valve is activated, and is especially opened and closed, and is protected with required cooling time and/or required (compressed air) volume flow
It holds unanimously, can be set between compressor and at least one compressed-air atomizer.It advantageously, moreover can in compressor and extremely
A preferred movable valve is set between a few compressed-air atomizer, passes through the stream of its adjustable fluid stream by nozzle
Speed, so as to adjust the volume flow by nozzle, for example, according to operational circumstances and/or according to the characteristic of component (such as portion
The thickness of part).
Preferably, the shape of (each) nozzle is fan nozzle.Further preferably, especially excellent when providing multiple nozzles
The multiple nozzles of selection of land are aligned to nozzle array.Especially, the arrangement of the shape of nozzle array and/or multiple nozzles and component
(required) geometry of at least one the first subregion is adapted.
Cooling is preferably carried out by multiple nozzles, especially by least five or the progress of even at least ten nozzles,
It can start individually or in groups, and can especially supply (specific) fluid volume flow.Preferably, nozzle as when
Between function be activated.It is furthermore preferred that one or more temperature of the nozzle to be deliberately arranged between all subregion of component
This mode (by the individually or in groups) starting of difference, for example, at least one first subregion and at least one second subregion it
Between.In addition, nozzle can (individually or in groups) start in a manner of as environment influence condition in temperature control station, it can be with
Component is acted on when leaving temperature control station, is compensated.This compensation especially should be understood to mean that prevention, can be with this
The mode of sample carries out, for example, being located closer to the region of the component at edge (especially in closer at least the one of edge-of-part
The region of a first subregion) with the component area than separate edge (especially than being located remotely from the component of edge-of-part extremely
The region of few first subregion) lower degree is cooled, to consider or even (substantially) compensate in its fringe region
Component faster cools down, this may the generation when leaving temperature control station, especially occur in the heat exchange with peripheral region.
As convection current cooling as a result, between at least one first subregion and at least one second subregion of component
At least 100K, the temperature difference of preferably at least 150K or even at least 200K are set.After cooling, which has part different
(component) temperature, wherein the temperature difference be set at least one the first subregion of the component the first temperature and at least one second
Between the second temperature of subregion.Furthermore, it is possible to which multiple (different) temperature differences are arranged between multiple subregions of component.Example
Such as, three or more sub-regions can be set in component, and each subregion has the temperature different from other subregions.Portion
Point different temperature can lead to generates different micro-structure and/or strength character in component, especially subsequent quenches possible
In fire process, such as in die quenching operating process.
At least one described nozzle is at least 2bar, preferably at least 2.5bar, particularly preferably at least 3.5bar or even extremely
The direct draught operation of few 5bar.Preferably, the fluid for forming fluid stream has at least 2bar in the inlet of at least one nozzle,
Preferably at least 2.5bar, the positive pressure of particularly preferably at least 3.5bar or even at least 5bar, especially in cooling procedure.Change sentence
It talks about, this means especially that the positive pressure for operating at least one nozzle can be measured on the entrance of at least one nozzle.When
When nozzle is connected to pressure (or compressed air) reservoir, the positive pressure for operating at least one nozzle will refer specifically to keep
Can with or the positive pressure that is stored in pressure accumlator.Here positive pressure is interpreted as determining relative to environmental pressure or atmospheric pressure
Pressure.
Fluid stream can be accelerated when flowing through at least one nozzle.Preferably, fluid stream leaves speed with the about velocity of sound
Degree leaves at least one nozzle.It may further be preferable that the fluid stream being discharged by least one nozzle will at least 3000Pa [pa
This card] or N/m2The blow gas pressure of [newton/square metre] is applied to the parts surface at least one first subregion of component
On.Preferably, at least 100K/s is set at least one first subregion of component by the cooling of at least one nozzle [to open
You text it is per second] cooling rate.
According to an advantageous embodiment, it proposes before cooling, at least by least one first subregion of the component
Heat at least 500K, preferably at least 600K or even at least 800K.Preferably, before cooling, at least one of component first
Subregion is heated by least one nozzle in the first smelting furnace and/or by radiant heat and/or convection current.Further preferably
Ground, at least one nozzle in temperature control station by being located at the first smelting furnace downstream are cooled down.
According to an advantageous embodiment, it proposes after the cooling period, at least by least one first subregion of the component
Heat at least 100K, preferably at least 150K or even at least 200K.Preferably, after cooling, at least one of component first
Subregion is heated by least one nozzle in the second smelting furnace and/or by radiant heat and/or convection current.When the second smelting furnace position
It is particularly preferred when the downstream of temperature control station.
A kind of method for being used for (partly different) heat-treated metal component is disclosed according to another aspect, including at least
Following steps:
A) heating element in the first smelting furnace, especially by radiant heat and/or convection current；
B) component is transferred to temperature control station；
C) by the first subregion be discharged fluid stream at least one nozzle to the component in temperature control station at least
One the first subregion carries out that convection current (part) is cooling, and wherein at least one first subregion and extremely of the component is arranged in the temperature difference
Between few second subregion, and wherein at least one described nozzle operates under at least normal pressure of 2bar.
Method and step a), b) and shown sequence c) be obtained in the common process of this method.Single or multiple sides
Method step simultaneously, continuously and/or can be carried out at least partly simultaneously
In step a), (entire) component heats in the first smelting furnace.Preferably, in the first smelting furnace uniform or samely
Heat the component.It is furthermore preferred that component (only) is heated by radiant heat in the first smelting furnace, such as pass through at least one
Electric heating element (not with component physical or electrical contact), such as heating circuit and/or heater strip, and/or pass through at least one
(gas heating) radiant tube.First smelting furnace can be continuous smelter or batch smelter.
In step b), particularly, component is transferred in temperature control station from the first smelting furnace.For this purpose, can mention
It for example, at least include roller-way and/or (industry) robot for transmission unit.Preferably, component is controlled from the first smelting furnace to temperature
Stand advance at least 0.5m [rice] distance.The component can be being contacted or guided in protective atmosphere with peripheral region.
In step c), at least one first subregion of the component (active) in temperature control station is cooled.It is excellent
Selection of land carries out inputting thermal energy at least one second subregion of component in temperature control station, while or at least partly same
When cooling-part at least one first subregion.Preferably, the second subregion of at least one of component is in temperature control station
(only) by heat radiation, for example, it is generated by least one electronic or heating heating element and/or radiation, particularly,
(and not with component contact) is arranged in temperature control station in it, such as heating circuit and/or heater strip, and/or by least
One (gas heating) radiant tube is particularly arranged in temperature control station.
Preferably, at least one second subregion that thermal energy is input to component can be in temperature control station in this manner
Carry out: when component is retained in temperature control station, the temperature of at least one the second subregion reduces and/or at least one second son
The cooling rate in region is at least reduced.When component is heated above the temperature of Ac3 temperature in step a), the process control
It is particularly advantageous.Alternately, be input to can be this at least one second subregion of component for thermal energy in temperature control station
Mode carries out: at least one second subregion of component is heated by (considerably), especially at least about 50K.In step a),
When heating element to the temperature lower than Ac3 temperature or even lower than Ac1 temperature, the process control is particularly advantageous.
According to advantageous embodiment, propose that the method further includes at least following steps:
D) component is transferred in the second smelting furnace from temperature control station；With
E) at least one first subregion of the component at least the second smelting furnace is heated at least 100K [Kelvin], especially
It is by radiant heat and/or convection current.
In step d), component is moved in the second smelting furnace from temperature control station.For this purpose, can provide for example extremely
It less include the delivery unit of roller-way and/or (industry) robot.Preferably, which advances at least 0.5 meter from temperature control station
Distance to the second smelting furnace.Guide member in protective atmosphere can be being contacted or is being in peripheral region.Preferably, the component
It is transferred directly in the second smelting furnace immediately after the removal of temperature control station.Second smelting furnace can be continuous smelter or intermittent
Smelting furnace.
In step e), at least it is (excellent to be heated at least 100K in the second smelting furnace for the first subregion of at least one of component
Select at least 150K or even at least 200K).In other words, another heating process is carried out in the second smelting furnace, wherein at least first
Before (active) cooling at least one first subregion be heated at least 100K.Preferably, at least at least one of component first
Subregion (only) is heated by radiant heat in the second smelting furnace, (is not connect with component by least one electric heating element such as
Touching), such as heating circuit and/or heater strip, and/or pass through at least one (gas heating) radiant tube.Further preferred
Be, in step e), especially while or at least partly simultaneously heat at least one first subregion, the component is at least
One the second subregion is especially (only) in the second smelting furnace and is heated at least 50K (particularly preferably at least 70K by radiant heat
Or even at least 100K), especially (only) pass through radiant heat.It is particularly preferred that in step e) by component at least one
Second subregion is heated above the temperature of Ac1 temperature or even higher than Ac3 temperature.Alternatively, in step e), especially while
Or at least one first subregion at least partly is heated simultaneously, when component is retained in the second smelting furnace, at least one second
The temperature of subregion reduces and/or the cooling rate of at least one the second subregion is at least reduced.
In other words, in step e), the input of thermal energy can be carried out, is input to whole part especially by radiant heat
In.For example, the second smelting furnace (for this purpose) may include furnace interior, especially (only) heated by radiant heat, wherein it is preferred that
The substantially homogeneous internal temperature in ground is dominant.Thermal energy is input at least one first subregion of component in the second smelting furnace
It is preferred that carrying out in this way: the temperature increase at least 100K of at least one the first subregion is preferably increased to few 120K, especially
Preferably at least 150 or even at least 200K.
In the second smelting furnace, at least one second subregion that thermal energy is input to component can preferably in this way
Carry out: when component is retained in the second smelting furnace, the temperature of at least one the second subregion reduces and/or at least one second son
The cooling rate in region is at least reduced.When component is heated above the temperature of Ac3 temperature in step a), the process control
It is particularly advantageous.Alternately, in the second smelting furnace, at least one second subregion that thermal energy is input to component can be in this way
Carry out: at least the second subregion of at least one of component is by (quite big) heating, especially at least 50K, particularly preferably at least 70K
Or even at least 100K, and/or it is heated above the temperature of Ac1 temperature or even higher than Ac3 temperature.As the general in step a)
When component is heated to lower than Ac3 temperature, even lower than Ac1 temperature, the process control is particularly advantageous.
According to another advantageous embodiment, propose that this method further includes at least following steps:
F) component is transferred in die quenching tool from temperature control station or the second smelting furnace；With
G) forming and cooling-part in die quenching tool.
Preferably, the movement in step f) is carried out by transmitting device, for example, at least includes roller-way and/or (industry) machine
People.Preferably, component is advanced from the second smelting furnace into die quenching tool at least distance of 0.5m.It can be connect with peripheral region
Touching or the guide member in protective atmosphere.Preferably, component is transferred directly to molding after taking out in the second smelting furnace immediately and quenches
In firer's tool.
According to an advantageous embodiment, it proposes that component is heated to lower than Ac3 temperature or even low in step a)
In the temperature of Ac1 temperature.Ac1 temperature is the transformation when heating metal parts (especially steel part) from ferrite to austenite
Start temperature.
According to the embodiment of one advantageous (substitution), component is heated above Ac3 temperature in step a) by proposition
Temperature.Ac3 temperature is when heating metal parts (especially steel part), and the transformation from ferrite to austenite terminates or
Temperature through (complete) completion.
According to Advantageous embodiments, at least one first subregion is cooled in step c) by convection current by proposition to be lower than
The temperature of Ac1 temperature.Preferably, in step c), especially by least one cooling first subregion of convection current to being lower than 550
The temperature of DEG C [degree Celsius] (823.15K), particularly preferably be lower than 500 DEG C (773.15K) or even lower than 450 DEG C
(723.15K)。
Details, feature and the advantageous embodiment of description associated with disclosed method first can also be with public affairs here
The method opened correspondingly is presented, and vice versa.In this respect, it provides there and further characterizes being described for these features
This is incorporated herein by the following way.
In order to realize described purpose, the method that (partly different) heat-treated metal component can also be used, packet
Include at least following steps:
A) heating element in the first smelting furnace, especially by radiant heat and/or convection current；
B) component is transferred to temperature control station；
C) by least one nozzle to the first subregion exhaust fluid stream to the component in temperature control station at least
One the first subregion carries out convection current (part) cooling, wherein at least one first subregion of the component and at least one
The temperature difference is set between the second subregion, and wherein at least one described nozzle is operated with compressed air.
Details, feature and the Advantageous embodiments of the description of the method in conjunction with disclosed in first, can also be correspondingly public herein
It is presented in the method opened, vice versa.In this respect, what is provided there further characterizes all comments of these features,
This is incorporated by reference into.
A kind of device for heat-treated metal component is disclosed according to another aspect, including at least following:
First smelting furnace, especially by heatable first smelting furnace of radiant heat and/or convection current；
Temperature control station positioned at the downstream of the first smelting furnace, is provided with or keeps at least one nozzle, the nozzle by with
In discharge fluid is at least one first subregion of cooling-part and be especially configured to can be at least one of component
The temperature difference is set between first subregion and at least one second subregion, is existed wherein preferably providing and configuring at least one nozzle
The direct draught of at least 2bar operates.
Second smelting furnace, positioned at temperature control station downstream and can heat, add especially by radiant heat and/or convection current
Heat is provided and is disposed at least one first subregion at least 100K of heating at least component.
The device can be used for implementing method disclosed herein.Preferably, provide and configure the device for implement herein public affairs
The method opened.Preferably, electronic control unit is adapted for carrying out method disclosed herein and configures thus, is assigned to institute
State device.It is particularly preferred that the control unit includes the microprocessor and electronics for this purpose of at least one process control
Memory, control program provide and are configured to carry out method disclosed herein stored in memory.
According to another Advantageous embodiments, proposes at least the first smelting furnace or the second smelting furnace is continuous smelter or intermittent molten
Furnace.Preferably, the first smelting furnace is continuous oven, especially roller hearth furnace.Second smelting furnace is particularly preferably continuous oven, especially roller bottom
Formula furnace or batch smelter especially include the multi-stage batch formula smelting furnace of at least two chambers stacked on top of each other.Preferably, second
Smelting furnace includes inside furnace, and especially (only) can be heated by radiant heat, it is preferable that can wherein be set substantially uniform
Internal temperature.Especially when the second melter designs are multi-stage batch formula smelting furnace, may exist multiple such inside furnaces,
Its quantity for corresponding to chamber.
Preferably, (only) radiant heat source is arranged in the first smelting furnace and/or the second smelting furnace.It is particularly preferred that at least
One electric heating element (not with component contact) (for example, at least an electric heating circuit and/or at least one electric heating
Silk) inside furnace of the first smelting furnace and/or the inside furnace of the second smelting furnace are set.As an alternative or supplement, at least one, special
It is not that the inside furnace of inside furnace and/or the second smelting furnace in the first smelting furnace can be set in the radiant tube of gas heating.It is preferred that
Multiple radiant tube gas burners or spoke is arranged in the inside furnace of the first smelting furnace and/or the inside furnace of the second smelting furnace in ground
Penetrate pipe, wherein at least one gas burner burns.Particularly advantageously, when in the wherein radiant tube of gas burner burns
When portion region is separated with inside furnace atmosphere, such burning gases or exhaust gas would not reach inside furnace and and then influence smelting furnace
Atmosphere.This system is also referred to as " indirect gas heating ".
It is arranged or keeps at least one nozzle in temperature control station, provide and is arranged for fluid to be discharged.At least one
A nozzle can be operated in the direct draught of at least 2bar.The device can also include at least one compressor, it is preferable that the pressure
Contracting machine is associated with temperature control station, especially for providing positive pressure.Compressor (can be not fixed ground) and be connected at least one spray
Mouth is especially connected to the entrance of nozzle.Preferably, which includes at least one pressure (or compressed air) reservoir, should
Reservoir is provided and is disposed for keeping the pressure provided by available compressor or stores the pressure.Pressure accumlator is preferred
Ground is allocated to temperature control station.It is further preferred that pressure accumlator setting is connecting the compressor at least one compression sky
In the pipe-line system of gas jets and/or it is connected in the pipe-line system between compressor and at least one compressed-air atomizer.
Compressor is preferably provided and is disposed for providing to form the fluid of fluid stream in at least direct draught of 2bar.Compressor is excellent
It is selected as reciprocating compressor, rotary compressor, especially screw compressor or turbocompressor, particularly preferably design has
The blade and (at least one stator) multiple fixed blades of (at least one rotor) multiple rotatable drivings.
As an alternative or supplement, source of pressurised fluid can be provided, may be coupled at least one nozzle, instead of compression
Machine or except for the compressor.This is preferably a kind of source that liquefied gas is vaporized, such as by heat exchanger appropriate, is made
Liquefied gas (such as liquefaction nitrogen) evaporation, such as in surrounding air.Then, if the gas pressure in the exit in source should mistake
It is low, then vaporized gas preferably can be supplied to compressor to increase pressure.
Preferably, (furthermore) at least one heating unit is arranged in temperature control station.Heating unit preferably provide and
It is configured to be input to thermal energy at least one second subregion of component.Particularly preferably, heating unit is in temperature control station
In be arranged and/or orient in this way: input thermal energy at least one second subregion of component can with pass through
At least one first subregion of at least one nozzle cooling-part at least partly carries out simultaneously or simultaneously.Preferably, it heats
Unit (only) includes at least one radiant heat source.Particularly preferably, at least one radiant heat source design has at least one electricity
Dynamic heating element (not with the component contact), a for example, at least electric heating circuit and/or at least one electric heating silk.
As an alternative or supplement, the radiant tube of at least one gas heating can be provided as radiant heat source.
In addition, the device may include die quenching tool, it is located at the downstream of the second smelting furnace.Particularly, die quenching work
Tool is provided and is configured to while or being at least partly formed simultaneously and (at least partly) quenched member.
In conjunction with details, feature and Advantageous embodiments that method describes, dress disclosed herein can also correspondingly be presented
It sets, vice versa.In this respect, all comments of these features of the further characterization of there offer pass through reference simultaneously herein
Enter.
The purposes for proposing at least one nozzle operated at least 2bar direct draught according to another aspect, it is cold for convection current
But the first sub-district of at least one of metal parts, wherein nozzle uses as follows: at least one first sub-district of component
At least temperature difference of 100K is set between domain and at least one second subregion.
It can also be correspondingly presented in conjunction with method and/or equipment details illustrated above, feature and Advantageous embodiments
In purposes disclosed herein, vice versa.In this respect, all comments for further characterizing these features that there provides are herein
It is incorporated by reference into.
To be based on attached drawing below, the present invention will be described in more detail and technological accumulation and inheritance.It should be noted that the present invention is not shown by shown
The limitation of example property embodiment.Particularly, unless expressly stated otherwise, the portion of theme described in attached drawing can also otherwise be extracted
Point aspect, and by these with from other accompanying drawings and/or this specification other components and/or discovery combine.In the diagram:
Fig. 1 shows the schematic diagram that can be used for implementing the device of the method for the invention；
Fig. 2 shows the detailed views of Fig. 1 device；
Fig. 3 shows the time-temperature curve that the method is realized according to the present invention；
Fig. 4 shows the achievable another time-temperature curve of the method according to the present invention.
Fig. 1 schematically shows the device 12 for heat-treated metal component 1, can be used for implementing of the present invention
Method.Device 12 includes the first smelting furnace 7, temperature control station 8, the second smelting furnace 9 and die quenching tool 11.Device 12 indicates this
Place is used for the hot forming line of die quenching.Therefore (direct) downstream positioned at the first smelting furnace 7 of temperature control station 8 passes through device 12
It is transmitted directly to component 1 to be processed when leaving the first smelting furnace 7 in temperature control station 8.In addition, the second smelting furnace 9 is (straight
Connect) it is located at the downstream of temperature control station 8, and (direct) downstream positioned at the second smelting furnace 9 of die quenching tool 11.
Fig. 2 shows schematically the detailed view of Fig. 1 device.Fig. 2 shows the temperature control station 8 of Fig. 1 device in more detail.
Nozzle 3 is arranged in temperature control station 8, and fluid stream 4 is discharged in the first subregion 2 of nozzle 3 towards component, will pass through convection current
(active) cools down first subregion 2.For example, nozzle 3 is the direct draught operation in 5bar.For this purpose, nozzle is in entrance side
It is connected to compressor 13.In addition, heating unit 11 is arranged in temperature control station 8, provides and the heating unit 11 is set and be used for
It transfers thermal energy in the second subregion 6 of component 1.For this purpose, for example heating unit 11 is designed as electric heating silk.
Fig. 3 schematically shows the time-temperature curve that the method is realized according to the present invention.Relative to time t
Draw the temperature T of the temperature T of metal parts or at least one first subregion of component and at least one the second subregion.
Metal parts 1 is uniformly heated up lower than Ac1 temperature by the time-temperature curve according to shown in Fig. 3 first
Temperature, until time point t1.For example, this heating here carries out in the first smelting furnace 2.In time point t1And t2It
Between, metal parts is transferred to temperature control station from the first smelting furnace.In the process, for example, due to the heat dissipation to peripheral region, portion
Part temperature may be reduced slightly.In time point t2And t3Between, at least one first subregion of the component is in the temperature
It is cooling by (active) in control station.This is based on time point t in Fig. 32And t3Between the time-temperature curve of bottom show.Together
When, at least one second subregion of (slight) heating element in temperature control station.This is based on time point t in Fig. 32And t3
Between top time-temperature curve show.In this way, at least one first subregion of component and at least one
Temperature difference 5 is provided between second subregion in temperature control station.
In time point t3And t4Between, which is transferred in the second smelting furnace different from the first smelting furnace from temperature control station.
In the process, the different temperature in the part being arranged in temperature control station may be reduced slightly, for example, due to peripheral region
Heat dissipation.
The component is in the second smelting furnace from time point t4It is heated to time point t5, so that the first son of at least one of component
The temperature increase at least 150K in region.In addition, the heating in the second smelting furnace carries out in this way: meanwhile, at least the one of component
The temperature of a second subregion reaches the temperature of Ac3 temperature or more.
In time point t5And t6Between, component is transferred in die quenching tool from the second smelting furnace.In the process, for example,
Due to the heat dissipation to peripheral region, the temperature partly different set in the second smelting furnace may be reduced slightly.
From time point t6Terminate to process, (entire) component quenches in die quenching tool.At least partially or even
Mainly it can produce martensite microstructure at least one second subregion of component, it is with relatively high intensity and relatively
Low ductility.In this process, there is no transformations substantially at least one first subregion of component, because of the portion
At least one first subregion of part is all not above Ac1 temperature at any point, and therefore, predominantly ferritic microstructure is protected
It stays at least one first subregion of component, there is relatively low intensity and relatively high ductility.
Fig. 4 schematically shows pass through achievable another time-temperature curve according to the method for the present invention.First,
Metal parts is uniformly heated up the temperature higher than Ac3 temperature, until time point t1.For example, here this plus
Heat carries out in the first smelting furnace.
In time point t1And t2Between, metal parts is transferred to temperature control station from the first smelting furnace.In the process, component
Temperature may be reduced slightly.In time point t2And t3Between, at least one first subregion of the component is in the temperature control
It is cooling by (active) in system station.This is based on time point t in Fig. 42And t3Between bottom time-temperature curve show.Meanwhile
In temperature control station, the temperature of at least one the second subregion of component can be reduced slightly.This is based on time point in Fig. 4
t2And t3Between top time-temperature curve show.This (passive) temperature drop at least one second subregion of component
(active) cooling rate is much smaller while low cooling rate is than at least one first subregion of component.It can be with from Fig. 4
It will become apparent from being arranged in temperature control station between at least one first subregion and at least one second subregion of component
Temperature difference 5.In time point t3And t4Between, which is transferred to second smelting furnace different from the first smelting furnace from temperature control station
In.In the process, the temperature partly different being arranged in temperature control station may be reduced slightly.The component is second
From time point t in smelting furnace4It is heated to time point t5, so that the temperature increase at least 150K of the first subregion of at least one of component.
In addition, the heating in the second smelting furnace carries out in this way: meanwhile, it is carried out with the cooling rate during radiating to peripheral region
Compare, the cooling rate of at least one the second subregion of component reduces.In time point t5And t6Between, component is from the second smelting furnace
It is transferred to die quenching tool.In the process, for example, due to the heat dissipation to peripheral region, the part that is set in the second smelting furnace
The different temperature in ground may be reduced slightly.From time point t6Terminate to process, (entire) component quenches in die quenching tool.
At least partially or even mainly it can produce martensite microstructure at least one second subregion of component, it has
Relatively high intensity and relatively low ductility.At least partially or even mainly at least one first subregion of component
In can produce bayesian bulk microstructure, it have relatively low intensity and relatively high ductility.
List of reference numbers
1 component
2 first subregions
3 nozzles
4 fluid streams
5 temperature difference
6 second subregions
7 first smelting furnaces
8 temperature control stations
9 second smelting furnaces
10 die quenching tools
11 heating units
12 devices
13 compressors
Claims (10)
1. the method that one kind is used for heat-treated metal component (1), which is characterized in that at least one first son of the component (1)
Region (2) is cooling to nozzle (3) convection current of the first subregion (2) discharge fluid stream (4) by least one, so that in the component
(1) at least temperature difference of 100K (5) is set between at least one first subregion (2) and at least one second subregion (6), until
Direct draught of few nozzle (3) at least 2bar operates.
2. the method as described in claim 1, which is characterized in that before cooling, at least by the component (1) at least one
First subregion (2) heats at least 500K.
3. method according to claim 1 or 2, which is characterized in that after cooling, at least at least by the component (1)
One the first subregion (2) heats at least 100K.
4. the method that one kind is used for heat-treated metal component (1), which is characterized in that including at least following steps:
A) heating element (1) in the first smelting furnace (7)；
B) component (1) is transferred to temperature control station (8)；
C) by least one nozzle (3) to the first subregion (2) discharge fluid stream (4) to the portion in temperature control station (8)
At least one first subregion (2) of part (1) carries out that convection current is cooling, wherein temperature difference (5) setting component (1) at least one
Between first subregion (2) and at least one second subregion (6), and wherein at least one nozzle (3) is at least 2bar's
Direct draught operation.
5. method as claimed in claim 4, which is characterized in that the method also includes at least following steps:
D) component (1) is transferred in the second smelting furnace (9) from temperature control station (8)；With
E) at least one first subregion (2) of the component (1) at least the second smelting furnace (9) is heated at least 100K.
6. method as described in claim 4 or 5, the method also includes at least following steps:
F) component (1) is transferred in die quenching tool (10) from temperature control station (8) or the second smelting furnace (9)；With
G) forming and cooling-part (1) in die quenching tool (10).
7. such as the described in any item methods of claim 4 to 6, which is characterized in that in step a), component (1) is heated to low
In the temperature of Ac3 temperature.
8. such as the described in any item methods of claim 4 to 6, which is characterized in that in step a), component (1) is heated supreme
In the temperature of Ac3 temperature.
9. the method as described in any one of claim 4 to 8, which is characterized in that described extremely by convection current general in step c)
Few first subregion (2) is cooled to the temperature lower than Ac1 temperature.
10. cooling metal parts (1) for convection current in the purposes at least one nozzle (3) that the direct draught of at least 2bar operates
At least one first subregion (2), at least one first subregion (2) of component (1) and at least one second sub-district
At least temperature difference of 100K (5) is set between domain (6).
Applications Claiming Priority (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016201025.5 | 2016-01-25 | ||
| DE102016201024.7A DE102016201024A1 (en) | 2016-01-25 | 2016-01-25 | Heat treatment process and heat treatment device |
| DE102016201025.5A DE102016201025A1 (en) | 2016-01-25 | 2016-01-25 | Heat treatment process and heat treatment device |
| DE102016201024.7 | 2016-01-25 | ||
| DE102016201936.8 | 2016-02-09 | ||
| DE102016201936.8A DE102016201936A1 (en) | 2016-02-09 | 2016-02-09 | Heat treatment process and heat treatment device |
| DE102016202766.2 | 2016-02-23 | ||
| DE102016202766.2A DE102016202766A1 (en) | 2016-02-23 | 2016-02-23 | Heat treatment process and heat treatment device |
| DE102016118253.2A DE102016118253A1 (en) | 2016-09-27 | 2016-09-27 | Process for heat treatment of a metallic component |
| DE102016118253.2 | 2016-09-27 | ||
| PCT/EP2017/051508 WO2017129600A1 (en) | 2016-01-25 | 2017-01-25 | Method for heat treatment of a metal component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109072330A true CN109072330A (en) | 2018-12-21 |
Family
ID=57965904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780008164.0A Pending CN109072330A (en) | 2016-01-25 | 2017-01-25 | Heat-treating methods for metal parts |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20190024203A1 (en) |
| EP (1) | EP3408420B1 (en) |
| CN (1) | CN109072330A (en) |
| ES (1) | ES2982368T3 (en) |
| HU (1) | HUE067310T2 (en) |
| WO (1) | WO2017129600A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111954722A (en) * | 2018-02-06 | 2020-11-17 | 集成热处理解决方案有限责任公司 | High pressure instantaneous uniform quench to control part performance |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017120128A1 (en) * | 2017-09-01 | 2019-03-07 | Schwartz Gmbh | Method for heating a metallic component to a target temperature and corresponding roller hearth furnace |
| DE102018109579A1 (en) * | 2018-04-20 | 2019-10-24 | Schwartz Gmbh | Temperature control device for partial cooling of a component |
| CN109022722B (en) * | 2018-07-23 | 2020-01-03 | 中国科学院金属研究所 | Manufacturing method of high-strength and high-toughness plough column |
| DE102020133462A1 (en) * | 2020-12-15 | 2022-06-15 | Schwartz Gmbh | Thermal treatment of components |
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| EP2548975A1 (en) * | 2011-07-20 | 2013-01-23 | LOI Thermprocess GmbH | Method and device for producing a hardened metallic component with at least two areas of different ductility |
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| DE10212819B4 (en) * | 2002-03-22 | 2004-07-08 | Benteler Automobiltechnik Gmbh | Process for the production of a metallic component |
| KR101277864B1 (en) * | 2011-03-31 | 2013-06-21 | 주식회사 포스코 | Apparatus for heat treatment of hot forming blank and method for manufacturing hot formed parts |
| US9951395B2 (en) * | 2012-03-13 | 2018-04-24 | Asteer Co., Ltd. | Method for strengthening steel plate member |
| DE102012218159B4 (en) * | 2012-10-04 | 2018-02-08 | Ebner Industrieofenbau Gmbh | handling device |
| KR101482336B1 (en) * | 2012-12-21 | 2015-01-13 | 주식회사 포스코 | Method for manufacturing hot forming parts having strength distribution |
| DE102013104229B3 (en) * | 2013-04-25 | 2014-10-16 | N. Bättenhausen Industrielle Wärme- und Elektrotechnik GmbH | Device for press hardening of components |
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2017
- 2017-01-25 WO PCT/EP2017/051508 patent/WO2017129600A1/en active Application Filing
- 2017-01-25 EP EP17703343.8A patent/EP3408420B1/en active Active
- 2017-01-25 ES ES17703343T patent/ES2982368T3/en active Active
- 2017-01-25 US US16/072,633 patent/US20190024203A1/en not_active Abandoned
- 2017-01-25 HU HUE17703343A patent/HUE067310T2/en unknown
- 2017-01-25 CN CN201780008164.0A patent/CN109072330A/en active Pending
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|---|---|---|---|---|
| EP2548975A1 (en) * | 2011-07-20 | 2013-01-23 | LOI Thermprocess GmbH | Method and device for producing a hardened metallic component with at least two areas of different ductility |
| CN204474718U (en) * | 2015-02-15 | 2015-07-15 | 赣州群星机器人有限公司 | Synchronizer gear sleeve press quenching lathe |
| CN204657935U (en) * | 2015-05-18 | 2015-09-23 | 江西三川铜业有限公司 | A kind of device for copper strips processing |
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| CN111954722A (en) * | 2018-02-06 | 2020-11-17 | 集成热处理解决方案有限责任公司 | High pressure instantaneous uniform quench to control part performance |
| US12000007B2 (en) | 2018-02-06 | 2024-06-04 | Integrated Heat Treating Solutions, Llc | High pressure instantaneously uniform quench to control part properties |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017129600A1 (en) | 2017-08-03 |
| ES2982368T3 (en) | 2024-10-15 |
| EP3408420C0 (en) | 2024-06-26 |
| HUE067310T2 (en) | 2024-10-28 |
| US20190024203A1 (en) | 2019-01-24 |
| EP3408420A1 (en) | 2018-12-05 |
| EP3408420B1 (en) | 2024-06-26 |
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Application publication date: 20181221 |