CN109894590A - A kind of continuous casting installation for casting and method of major diameter copper alloy tube - Google Patents
A kind of continuous casting installation for casting and method of major diameter copper alloy tube Download PDFInfo
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- CN109894590A CN109894590A CN201910244924.9A CN201910244924A CN109894590A CN 109894590 A CN109894590 A CN 109894590A CN 201910244924 A CN201910244924 A CN 201910244924A CN 109894590 A CN109894590 A CN 109894590A
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Abstract
The invention belongs to metal material technology processing technology of preparing field more particularly to a kind of continuous casting installation for casting and method of major diameter copper alloy tube.The continuous casting installation for casting includes: melting furnace, metaideophone slot, external mold, plug, level monitoring device, attemperator, casting mold heating device, temperature monitoring device, water cooling copper sleeve and secondary cooling apparatus.The present invention proposes to produce major diameter copper alloy tube using the cold combination vertical mould continuous casing of heat, it is formed in solidification front strong along axial temperature gradient, tubing has along axial columanar structure, conducive to the floating and exclusion of casting impurity, tubing impurity content is low, uniform wall thickness is good, single weight long length is long, has that high production efficiency, process flow is short, lumber recovery is high, the advantages such as at low cost.
Description
Technical field:
The invention belongs to technical field of metal material, are related to a kind of major diameter copper-alloy pipe-material production method.
Background technique:
Copper alloy has excellent mechanical property, good heating conduction, corrosion resistance and anti-bioadhesive property, answers extensively
For fields such as thermal power generation, ship, sea water desalinations.
Currently, domestic major diameter copper alloy tube mainly uses, " the solid ingot casting of D.C.casting-perforation extruding-pickling-is expanding
Drawing-intermediate annealing-undergauge drawing-annealing " technique (referred to as " squeezed drawing " technique) [see: Wang Hua magnitude, it is a kind of big straight
The process for making of diameter copper alloy tube, Chinese invention patent, grant number ZL200710054272.X；Chen Qin, Liu Guanglong, Lee
Juan, the product development of heavy caliber copper alloy tube and technical study, Shanghai non-ferrous metal, 2013, Vol34, No.2, p.55~58] into
Row production.However, being had the following problems using " extruding-expanding stretching-undergauge stretches " technique:
(1) equipment investment is big, and the pipe of production diameter phi 300mm or more needs 5000 tons or more of large-size extruder；
(2) extrusion tube blank is eccentric serious, using it is expanding be stretching in enlarged diameter while, tube wall thickness can be further amplified not
The uniformity easily causes scrap of the product；
(3) expanding/undergauge stretching single pass heavy deformation is small, and processing passage is more, also needs intermediate annealing, process flow is long；
(4) finished product rate is low (less than 30%), high production cost.
" horizontal casting-drawing " method is a kind of major diameter copper alloy tube production method [Jiang Yanbin, the Liu Xin being recently proposed
China, Xie Jianxin, Mao Xiaodong, a kind of large diameter thin wall copper-alloy pipe-material short-flow production method, Chinese patent, grant number CN
105312353 B], this method has axial orientation columanar structure hollow bloom by the cold combined horizontal continuous casting preparation of heat, then
Drawing is carried out to hollow bloom, produces major diameter copper alloy tube, the method is compared to " extruding-expanding stretching-undergauge stretches " side
Method, process flow are substantially shortened, and the short route preparation of major diameter copper-alloy pipe-material is realized.But this method is big straight in preparation
Diameter has some disadvantages especially more than the pipe of 300 or more φ and limitation, is mainly shown as:
(1) since horizontal casting tubing receives the influence of gravity, cooling slight different up and down, pipe generates solidifying in continuous casting process
Gu tissue and uneven components phenomenon, while will also result in the increase of continuously cast billet for pipe-making wall thickness deviation, the more big this influence of diameter is brighter
It is aobvious；
(2) due to just determining that the diameter of continuously cast billet for pipe-making will be consistently greater than finished product tubing using " horizontal casting-drawing " method, because
This when production tube material is relatively large in diameter (> 300mm), the high quality thin-walled copper alloy tube difficulty of horizontal casting φ 300mm or more compared with
Greatly.
Traditional continuous vertical casting is all that alloy melt cast gate is directly injected into crystallizer, and melt is not protected in solidification
Mild to stand process, gas in melt is mingled with no time and space is floated and removed, on the other hand, as copper closes
Golden pipe diameter becomes larger, and tubing radial direction heat dissipation area increases, radial heat transfer enhancing, the major diameter especially more than φ 200mm
Tubing becomes apparent.
Based on the above background, the present invention proposes to close using the cold combination vertical mould continuous casting process production large size copper of heat
Jin Guan, overcomes the defect of horizontal casting and vertical continuous casting, realizes tubing tissue and homogenization of composition, realizes major diameter, high-precision
Degree, the production of high-quality copper alloy pipe.
Summary of the invention:
The purpose of the present invention is for major diameter copper-alloy pipe-material traditional processing technology long flow path, lumber recovery is low, at high cost etc. asks
Topic provides a kind of production equipment and method with high yield, inexpensive major diameter copper-alloy pipe-material.
To achieve the above object, the technical scheme is that a kind of vertical continuous casting equipment of major diameter copper alloy tube, institute
Stating continuous casting installation for casting includes:
Melting furnace is used for melting copper alloy raw material；
Metaideophone slot, for carrying out water conservancy diversion to the molten alloyed copper after fusing；
External mold, for storing molten alloyed copper；
Plug is placed in the inside of the external mold, and there are gaps between the lateral wall of the plug and the inner sidewall of external mold, are used for
Cooperate outer mold forming major diameter copper alloy；
Level monitoring device, the liquid level for the molten alloyed copper in external mold described in real-time monitoring change；
Attemperator, for being kept the temperature to the molten alloyed copper in external mold；
Casting mold heating device, setting is in the attemperator lower end, for closing to the copper entered between external mold and plug gap
Golden melt carries out casting mold heating；
Temperature monitoring device, for monitoring the temperature change of casting mold heating in real time；
Water cooling copper sleeve, for being cooled down for the first time to major diameter compo pipe after molding；
Secondary cooling apparatus, for carrying out secondary cooling to major diameter compo pipe after molding.
According to the embodiment of the present disclosure, bottom center position inside the melting furnace is equipped with fluid hole, on the fluid hole
Equipped with stopper rod flow control structure；
The fluid hole is connected to one end that the level being arranged in the fusing furnace bottom goes out liquid stream road, the horizontal liquid stream out
The other end in road is connected to one end of the metaideophone slot, and the metaideophone slot other end is placed in inside the external mold；
The external mold is divided into soaking zone, casting mold a heating section and a cooling section from top to bottom, and the attemperator is arranged described
On the lateral wall of soaking zone, the casting mold heating device is arranged on the lateral wall of the casting mold bringing-up section, the water cooling copper sleeve
It is arranged on the lateral wall of the cooling section；The lower section of the water cooling copper sleeve is arranged in the secondary cooling apparatus；
The level monitoring device is arranged on the side wall of the external mold, the level monitoring device and the stopper rod flow control structure
The probe of control connection, the level monitoring device is arranged inside the external mold；
The casting mold bringing-up section of the external mold is arranged in the temperature monitoring device；
The plug is placed in inside the external mold, and is located at casting mold a heating section and a cooling section；
The exit of the external mold bottom is arranged in the dummy bar head, and the dummy bar head is connect with dummy bar, the dummy bar
Two sides are equipped with dragger；Sawing machine is located at the lower end of the dummy bar.
According to the embodiment of the present disclosure, the continuous casting installation for casting of the major diameter copper alloy tube further includes insulating layer, the insulating layer
It is coated on the lateral wall of the external mold positioned at the soaking zone and casting mold bringing-up section, the insulating layer pours for refractory material
It forms, the external mold and plug are all made of graphite and are made；The length of the casting mold bringing-up section is 30~100mm.
According to the embodiment of the present disclosure, the diameter ratio of major diameter compo pipe is 0.5 after the water cooling copper sleeve height and molding
~0.8.
According to the embodiment of the present disclosure, the attemperator is that high-frequency heating keeps the temperature coil；The casting mold heating device is heat
Type section heat type section high frequency coil, the heat type section high frequency coil are inside and outside double-layer coil structure.
The embodiment of the present disclosure also discloses a kind of continuous cast method with above equipment preparation major diameter copper alloy tube, described
Method specifically comprises the following steps:
Step 1: all parts being installed in place on casting platform, connect the primary cooling water of water cooling copper sleeve；
Step 2: starting attemperator preheats the soaking zone of the external mold；
Copper alloy in melting furnace is placed in fusing again, obtains copper alloy solution, stopper rod flow control structure molten alloyed copper is opened and passes through
Metaideophone slot is input to inside outer membrane, and molten alloyed copper is made to be located at soaking zone, and it is high to monitor copper alloy liquid level by tank level control system
Degree, graphite flakes or coverture covering are placed on molten alloyed copper liquid level to be prevented from aoxidizing, and stands a period of time；
Step 3: starting casting mold heating device keeps the temperature at certain temperature to the continuous heating of the casting mold bringing-up section of external mold
Degree；
Step 4: the copper alloy solution after being heated enters the sky between cooling section external mold and plug under gravity
Gap makes the position of solid-liquid interface be in the transition region of heat type section and cold mould section, obtains major diameter in the cooling lower mold of water cooling copper sleeve
Alloy pipe stock opens secondary cooling water installations, obtains major diameter alloy pipe stock to casting mold and carries out secondary cooling, starts dragger
Structure obtains major diameter alloy pipe stock with certain initial hauling speed traction casting mold；
Step 5: scale sawing being carried out by sawing machine and obtains major diameter copper-alloy pipe-material.
According to the embodiment of the present disclosure, primary cooling water flow is 5~100L/h in the step 1.
According to the embodiment of the present disclosure, in the step 2: the liquid level of the melting furnace is 350~450mm；It is described outer
The preheating temperature of mould is 800~1200 DEG C；Be transferred to the molten alloyed copper temperature in external mold be copper alloy liquid phase line more than 100~
200 DEG C, holding temperature is 50~150 DEG C of copper alloy liquid phase line or more；Time of repose is 10~30 minutes.
According to the embodiment of the present disclosure, the temperature that casting mold heats in the step 3 is copper alloy liquid phase line or more 50~150
℃。
According to the embodiment of the present disclosure, in the step 4, initial hauling speed is 20~60mm/min, steady production speed
50~600mm/min, secondary cooling water flow are 10~100L/min.
The beneficial effects of the present invention are:
(1) big specification (> φ 300mm or more) copper can be realized using major diameter copper pipe vertical continuous casting equipment proposed by the present invention
The quick production of compo pipe, have the advantages that it is easy for installation, using simple, easily operated, low in cost；
(2) becoming larger with copper alloy tube diameter, tubing radial direction heat dissipation area increase, and radial heat transfer enhancing, especially diameter is big
It is become apparent in the major diameter tubing of φ 200mm or more, the present invention is in graphite jig integrated design, heat type section high-frequency high-power
Double-layer coil etc. proposes new design, to guarantee to realize the higher temperature gradient of major diameter copper alloy tube solidification front.
(3) traditional continuous vertical casting is all that alloy melt cast gate is directly injected into crystallizer, and melt does not have in solidification
There is heat preservation and stand process, gas in melt is mingled with no time and space is floated and removed, and alloy cast ingot is easy to produce
Raw defect, the present invention are equipped with soak zones above copper alloy tube solidification for this problem, melt realized in heat preservation domain gas,
It is mingled with etc. and floats, realizes cleaning molten, on the other hand realize casting temperature stability contorting.
(4) the cold combination vertical continuous casting process of heat proposed by the present invention forms high-temperature ladder in freezing interface forward position
Degree forms nearly horizontal solid liquid interface, is conducive to the floating and exclusion of gas and impurity element in melt, prepared copper alloy
Pipe base dense structure, ingredient are uniform.Slab axially by gravity influenced identical, intensity of cooling is identical, and solidified structure is uniform,
Pipe wall thickness deviation is small, can prepare the major diameter continuously casting copper alloy pipe of high quality.
Detailed description of the invention:
Fig. 1 is major diameter copper alloy tube vertical continuous casting equipment schematic diagram proposed by the present invention.
In figure:
1. melting furnace, 2. metaideophone slots, 3. level monitoring devices, 4. external molds, 5. attemperators, 6. plugs, the heating of 7. casting molds
Device, 8. temperature monitoring device, 9. water cooling copper sleeves, 10. secondary cooling apparatus, 11. dummy bar heads, 12. draggers, 13.
Dummy bar, 14. sawing machines.
Specific embodiment
Technical solution of the present invention is described in detail below with reference to an example, it is clear that described example is only
It is small part in the present invention, rather than whole examples.Based on the example in the present invention, those skilled in the art are not being done
Every other example obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of vertical continuous casting equipment of major diameter copper alloy tube of the present invention, the continuous casting installation for casting include:
Melting furnace is used for melting copper alloy raw material；
Metaideophone slot, for carrying out water conservancy diversion to the molten alloyed copper after fusing；
External mold, for storing molten alloyed copper；
Plug is placed in the inside of the external mold, and there are gaps between the lateral wall of the plug and the inner sidewall of external mold, are used for
Cooperate outer mold forming major diameter copper alloy；
Level monitoring device, the liquid level for the molten alloyed copper in external mold described in real-time monitoring change；
Attemperator, for being kept the temperature to the molten alloyed copper in external mold；
Casting mold heating device, setting is in the attemperator lower end, for closing to the copper entered between external mold and plug gap
Golden melt carries out casting mold heating；
Temperature monitoring device, for monitoring the temperature change of casting mold heating in real time；
Water cooling copper sleeve, for being cooled down for the first time to major diameter compo pipe after molding；
Secondary cooling apparatus, for carrying out secondary cooling to major diameter compo pipe after molding；
According to the embodiment of the present disclosure, the bottom center position inside the melting furnace is equipped with fluid hole, and the fluid hole is equipped with
Stopper rod flow control structure；
The fluid hole is connected to one end that the level being arranged in the fusing furnace bottom goes out liquid stream road, the horizontal liquid stream out
The other end in road is connected to one end of the metaideophone slot, and the metaideophone slot other end is placed in inside the external mold；
The external mold is divided into soaking zone, casting mold a heating section and a cooling section from top to bottom, and the attemperator is arranged described
On the lateral wall of soaking zone, the casting mold heating device is arranged on the lateral wall of the casting mold bringing-up section, the water cooling copper sleeve
It is arranged on the lateral wall of the cooling section；The lower section of the water cooling copper sleeve is arranged in the secondary cooling apparatus；
The level monitoring device is arranged on the side wall of the external mold, the level monitoring device and the stopper rod flow control structure
The probe of control connection, the level monitoring device is arranged inside the external mold；
The casting mold bringing-up section of the external mold is arranged in the temperature monitoring device；
The plug is placed in inside the external mold, and is located at casting mold a heating section and a cooling section；
The exit of the external mold bottom is arranged in the dummy bar head, and the dummy bar head is connect with dummy bar, the dummy bar
Two sides are equipped with dragger；Sawing machine is located at the lower end of the dummy bar.
According to the embodiment of the present disclosure, the continuous casting installation for casting of the major diameter copper alloy tube further includes insulating layer, the insulating layer
It is coated on the lateral wall of the external mold positioned at the soaking zone and casting mold bringing-up section, the insulating layer pours for refractory material
It forms, the external mold and plug are all made of graphite and are made；The length of the casting mold bringing-up section is 30~100mm；The cold mould section
Length be 50~150mm.
According to the embodiment of the present disclosure, the diameter ratio of major diameter compo pipe is 0.5 after the water cooling copper sleeve height and molding
~0.8.
According to the embodiment of the present disclosure, the attemperator is that high-frequency heating keeps the temperature coil；The casting mold heating device is heat
Type section high frequency coil, the heat type section high frequency coil are inside and outside double-layer coil structure.
The embodiment of the present disclosure also discloses a kind of continuous cast method with above equipment preparation major diameter copper alloy tube, described
Method specifically comprises the following steps:
Step 1: all parts being installed in place on casting platform, connect the primary cooling water of water cooling copper sleeve；
Step 2: starting attemperator preheats the soaking zone of the external mold；
Copper alloy in melting furnace is placed in fusing again, obtains copper alloy solution, stopper rod flow control structure molten alloyed copper is opened and passes through
Metaideophone slot is input to inside outer membrane, and molten alloyed copper is made to be located at soaking zone, and it is high to monitor copper alloy liquid level by tank level control system
Degree, graphite flakes or coverture covering are placed on molten alloyed copper liquid level to be prevented from aoxidizing, and stands a period of time；
Step 3: starting casting mold heating device keeps the temperature at certain temperature to the continuous heating of the casting mold bringing-up section of external mold
Degree；
Step 4: the copper alloy solution after being heated enters the sky between cooling section external mold and plug under gravity
Gap makes the position of solid-liquid interface be in the transition region of heat type section and cold mould section, obtains major diameter in the cooling lower mold of water cooling copper sleeve
Alloy pipe stock opens secondary cooling water installations, obtains major diameter alloy pipe stock to casting mold and carries out secondary cooling, starts dragger
Structure obtains major diameter alloy pipe stock with certain initial hauling speed traction casting mold；
Step 5: scale sawing being carried out by sawing machine and obtains major diameter copper-alloy pipe-material.
According to the embodiment of the present disclosure, primary cooling water flow is 5~100L/h in the step 1.
According to the embodiment of the present disclosure, in the step 2: the liquid level of the melting furnace is 350~450mm；It is described outer
The preheating temperature of mould is 800~1200 DEG C；Be transferred to the molten alloyed copper temperature in external mold be copper alloy liquid phase line more than 100~
200 DEG C, holding temperature is 50~150 DEG C of copper alloy liquid phase line or more；Time of repose is 10~30 minutes.
According to the embodiment of the present disclosure, the temperature that casting mold heats in the step 3 is copper alloy liquid phase line or more 50~150
℃。
According to the embodiment of the present disclosure, in the step 4, initial hauling speed is 20~60mm/min, steady production speed
50~600mm/min, secondary cooling water flow are 10~100L/min.
Embodiment 1:
Having a size of φ 325 × 10mm BFe10-1.4-1 copper alloy tube continuous casting process
Step 1: the cold combination vertical continuous casting installation for casting of heat is installed in place, and 4 internal diameter of graphite external mold is φ 330mm, primary cooling water flow
For 10L/min；
Step 2: the soaking zone of graphite external mold being heated to 1000 DEG C, is transferred to BFe10-1.4-1 molten alloyed copper, solution temperature is
1250 DEG C, high-frequency heating keeps the temperature coil heats graphite jig and molten alloyed copper to 1200 DEG C, and heat preservation stands 30 minutes；
Step 3: heat type heating coils heat type temperature is to 1200 DEG C；
Step 4: opening continuous casting trailer system, open secondary cooling water, initial hauling speed is 30mm/min, and secondary water flow is
10L/min, positive to produce speed of production 100mm/min, a water flow is 30L/min, and secondary water flow is 40L/min.
Embodiment 2:
Having a size of φ 273 × 8mm H68 copper alloy tube continuous cast method
Step 1: the cold combination vertical continuous casting installation for casting of heat is installed in place, and 4 internal diameter of graphite external mold is φ 280mm, primary cooling water flow
For 8L/min；
Step 2: the soaking zone of graphite external mold being heated to 800 DEG C, is transferred to H68 molten alloyed copper, solution temperature is 1050 DEG C, high
To 1050 DEG C, heat preservation stands 30 minutes for frequency heating and thermal insulation coil heats graphite jig and molten alloyed copper；
Step 3: heat type heating coils heat type temperature is to 1000 DEG C；
Step 4: opening continuous casting trailer system, open secondary cooling water, initial hauling speed is 30mm/min, and secondary water flow is
10L/min, positive to produce speed of production 150mm/min, a water flow is 30L/min, and secondary water flow is 40L/min.
Embodiment 3:
Having a size of φ 259 × 6mmBFe30-1-1 copper alloy tube continuous casting producing method
Step 1: the cold combination vertical continuous casting installation for casting of heat is installed in place, and 4 internal diameter of graphite external mold is φ 262mm, primary cooling water flow
For 15L/min；
Step 2: the soaking zone of graphite external mold being heated to 1000 DEG C, is transferred to BFe30-1-1 molten alloyed copper, solution temperature is
1300 DEG C, high-frequency heating keeps the temperature coil heats graphite jig and molten alloyed copper to 1250 DEG C, and heat preservation stands 30 minutes；
Step 3: heat type heating coils heat type temperature is to 1250 DEG C；
Step 4: opening continuous casting trailer system, open secondary cooling water, initial hauling speed is 20mm/min, and secondary water flow is
15L/min, positive to produce speed of production 60mm/min, a water flow is 40L/min, and secondary water flow is 40L/min.
Advantages of the present invention has been shown and described above.It should be understood by those skilled in the art that the present invention is not by above-mentioned
The limitation of embodiment, the above embodiments and description only illustrate the principle of the present invention, is not departing from essence of the invention
Under the premise of mind and range, various changes and improvements may be made to the invention, these changes and improvements both fall within claimed
In invention scope.The scope of the present invention is defined by the appended claims and its equivalents.
Claims (10)
1. a kind of continuous casting installation for casting of major diameter copper alloy tube, feature are being that the continuous casting installation for casting includes:
Melting furnace is used for melting copper alloy raw material；
Metaideophone slot, for carrying out water conservancy diversion to the molten alloyed copper after fusing；
External mold, for storing molten alloyed copper；
Plug is placed in the inside of the external mold, and there are gaps between the lateral wall of the plug and the inner sidewall of external mold, are used for
Cooperate outer mold forming major diameter copper alloy；
Level monitoring device, the liquid level for the molten alloyed copper in external mold described in real-time monitoring change；
Attemperator, for being kept the temperature to the molten alloyed copper in external mold；
Casting mold heating device, setting is in the attemperator lower end, for closing to the copper entered between external mold and plug gap
Golden melt carries out casting mold heating；
Temperature monitoring device, for monitoring the temperature change of casting mold heating in real time；
Water cooling copper sleeve, for being cooled down for the first time to major diameter compo pipe after molding；
Secondary cooling apparatus, for carrying out secondary cooling to major diameter compo pipe after molding.
2. the continuous casting installation for casting of major diameter copper alloy tube according to claim 1, which is characterized in that inside the melting furnace
Bottom center position is equipped with fluid hole, and the fluid hole is equipped with stopper rod flow control structure；
The fluid hole is connected to one end that the level being arranged in the fusing furnace bottom goes out liquid stream road, the horizontal liquid stream out
The other end in road is connected to one end of the metaideophone slot, and the metaideophone slot other end is placed in inside the external mold；
The external mold is divided into soaking zone, casting mold a heating section and a cooling section from top to bottom, and the attemperator is arranged described
On the lateral wall of soaking zone, the casting mold heating device is arranged on the lateral wall of the casting mold bringing-up section, the water cooling copper sleeve
It is arranged on the lateral wall of the cooling section；The lower section of the water cooling copper sleeve is arranged in the secondary cooling apparatus；
The level monitoring device is arranged on the side wall of the external mold, the level monitoring device and the stopper rod flow control structure
The probe of control connection, the level monitoring device is arranged inside the external mold；
The casting mold bringing-up section of the external mold is arranged in the temperature monitoring device；
The plug is placed in inside the external mold, and is located at casting mold a heating section and a cooling section；
The exit of the external mold bottom is arranged in the dummy bar head, and the dummy bar head is connect with dummy bar, the dummy bar
Two sides are equipped with dragger；Sawing machine is located at the lower end of the dummy bar.
3. the continuous casting installation for casting of major diameter copper alloy tube according to claim 2, which is characterized in that the major diameter copper alloy
The continuous casting installation for casting of pipe further includes insulating layer, and the insulating layer is coated on the external mold positioned at the soaking zone and casting mold bringing-up section
Lateral wall on, the insulating layer be refractory material pour, the external mold and plug are all made of graphite and are made；The casting mold
The length of bringing-up section is 30~100mm.
4. the continuous casting installation for casting of major diameter copper alloy tube according to claim 1, which is characterized in that the water cooling copper sleeve height
Diameter ratio with major diameter compo pipe after molding is 0.5~0.8.
5. the continuous casting installation for casting of major diameter copper alloy tube according to claim 2, which is characterized in that the attemperator is height
Frequency heating and thermal insulation coil；The casting mold heating device is heat type section heat type section high frequency coil, and the heat type section high frequency coil is
Inside and outside double-layer coil structure.
6. a kind of continuous cast method with any one of the claim 1-5 equipment preparation major diameter copper alloy tube, feature exist
In the method specifically comprises the following steps:
Step 1: all parts being installed in place on casting platform, connect the primary cooling water of water cooling copper sleeve；
Step 2: starting attemperator preheats the soaking zone of the external mold；
Copper alloy in melting furnace is placed in fusing again, obtains copper alloy solution, stopper rod flow control structure molten alloyed copper is opened and passes through
Metaideophone slot is input to inside outer membrane, and molten alloyed copper is made to be located at soaking zone, and it is high to monitor copper alloy liquid level by tank level control system
Degree, graphite flakes or coverture covering are placed on molten alloyed copper liquid level to be prevented from aoxidizing, and stands a period of time；
Step 3: starting casting mold heating device keeps the temperature at certain temperature to the continuous heating of the casting mold bringing-up section of external mold
Degree；
Step 4: the copper alloy solution after being heated enters the sky between cooling section external mold and plug under gravity
Gap makes the position of solid-liquid interface be in the transition region of heat type section and cold mould section, obtains major diameter in the cooling lower mold of water cooling copper sleeve
Alloy pipe stock opens secondary cooling water installations, obtains major diameter alloy pipe stock to casting mold and carries out secondary cooling, starts dragger
Structure obtains major diameter alloy pipe stock with certain initial hauling speed traction casting mold；
Step 5: scale sawing being carried out by sawing machine and obtains major diameter copper-alloy pipe-material.
7. continuous cast method according to claim 6, which is characterized in that in the step 1 primary cooling water flow be 5~
100L/h。
8. continuous cast method according to claim 6, which is characterized in that in the step 2: the liquid level of the melting furnace
For 350~450mm；The preheating temperature of the external mold is 800~1200 DEG C；The molten alloyed copper temperature in external mold is transferred to as copper conjunction
More than golden liquidus curve 100~200 DEG C, holding temperature is 50~150 DEG C of copper alloy liquid phase line or more；Time of repose is 10~30 points
Clock.
9. continuous cast method according to claim 6, which is characterized in that the temperature that casting mold heats in the step 3 is copper conjunction
More than golden liquidus curve 50~150 DEG C.
10. continuous cast method according to claim 6, which is characterized in that in the step 4, initial hauling speed be 20~
60mm/min, steady production 50~600mm/min of speed, secondary cooling water flow are 10~100L/min.
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| CN201910244924.9A CN109894590B (en) | 2019-03-28 | 2019-03-28 | Continuous casting equipment and method for large-diameter copper alloy pipe |
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| CN201910244924.9A CN109894590B (en) | 2019-03-28 | 2019-03-28 | Continuous casting equipment and method for large-diameter copper alloy pipe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112059129A (en) * | 2020-07-15 | 2020-12-11 | 金龙精密铜管集团股份有限公司 | Production method of low-alloy-content copper pipe |
| CN112605352A (en) * | 2020-10-27 | 2021-04-06 | 佛山市三水凤铝铝业有限公司 | Casting method of aluminum alloy cast rod |
| CN113333708A (en) * | 2021-05-27 | 2021-09-03 | 宁波金田铜业(集团)股份有限公司 | Control method for generating axial columnar crystal by copper and copper alloy and obtained copper and copper alloy |
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| CN112605352A (en) * | 2020-10-27 | 2021-04-06 | 佛山市三水凤铝铝业有限公司 | Casting method of aluminum alloy cast rod |
| CN113333708A (en) * | 2021-05-27 | 2021-09-03 | 宁波金田铜业(集团)股份有限公司 | Control method for generating axial columnar crystal by copper and copper alloy and obtained copper and copper alloy |
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