CN107130098B - Heat-treatment of rail device and heat treatment method - Google Patents
Heat-treatment of rail device and heat treatment method Download PDFInfo
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- CN107130098B CN107130098B CN201710448497.7A CN201710448497A CN107130098B CN 107130098 B CN107130098 B CN 107130098B CN 201710448497 A CN201710448497 A CN 201710448497A CN 107130098 B CN107130098 B CN 107130098B
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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
- C21D9/04—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails
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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
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
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- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of heat-treatment of rail devices comprising heat treatment mechanism, water supply mechanism, gas supply mechanism, main frame and the rail placement mechanism for placing rail；Heat treatment mechanism includes pressure stabilizing bellows, and the pressure stabilizing bellows are connect with upper bellows, lower bellows, left bellows, right bellows respectively by small ventilation duct, which lower bellows, left bellows, is equipped with first jet on right bellows；The first jet of upper bellows is placed in the surface of rail, and the first jet of lower bellows is placed in the underface of rail, and the first jet of upper bellows, the central axes of the first jet of lower bellows are overlapped with the central axes of rail；The first jet of left bellows, right bellows first jet be symmetricly set on the two sides of rail；Water supply mechanism, gas supply mechanism are connect with pressure stabilizing risk respectively；Rail placement mechanism is placed in main frame.The present invention also provides a kind of heat treatment method for steel rail.The present invention is simple and convenient to operate, and can ensure that the thermal effectiveness of rail.
Description
Technical field
The invention belongs to metal heat treatmet equipment technology fields, and in particular to a kind of heat-treatment of rail device and heat treatment side
Method.
Background technique
With the popularization of China railways " passenger traffic high speed, shipping heavy loading " mode, railways train operation speed, trailing weight,
Traffic density and year are continuously increased by gross weight, and common hot rolled rail intensity has been insufficient for railway development new demand, steel
The rail hurt frequency increases, and the especially rolling contact fatigues such as fish scale wound, removing chip off-falling of curved section rail are more serious.For this purpose,
Railroad requires, to reduce the generation of rail defects and failures, to improve using high-intensitive, high-wear resistance and anti-contact fatigue rail
Its service life.
Both at home and abroad research and actual use experience have shown that, heat-treatment of rail technique be improve intensity, wearability and improve steel
The most effective method of rail service performance, the service life of thermally treated rail can reach 2-3 times of common hot rolled rail.
Heat-treatment of rail technology is to obtain shred pearlitic structrure by controlling cooling velocity after rolling.It can satisfy at present
The technology of the requirement mainly has four kinds of types of cooling such as spray wind, spraying, water cooling and polymer cooling.Water-spraying control (water cooling) ability
Larger, cooling velocity is difficult to accurately control, and may result in the generation of the adverse tissues such as martensite, and nozzle is easy blocking,
Influence thermal effectiveness；The polymer type of cooling avoids water as cooling medium, the too big problem of cooling velocity, while also protecting
It has demonstrate,proved in perlitic transformation area, the uniformity of structural transformation stress, but in actual production, the concentration of water and polymer is difficult to
It accurately controls, affects thermal effectiveness.The cooling velocity of spray wind and misting cooling is adopted between water cooling and polymer cooling
It uses compressed air or water mist as cooling medium, has flow field uniformity good, the advantages of performance is stablized, even tissue, and
It is smaller to the surface state sensibility of rail, it is the development trend of heat-treatment of rail technology.Current rail spray wind or spraying cold
But apparatus structure is complicated, cumbersome.Therefore, we there is an urgent need to one kind to be not only simple in structure, easy to use, and can ensure that
The heat-treatment of rail device of thermal effectiveness.
Summary of the invention
The purpose of the present invention is to provide a kind of heat-treatment of rail device and heat treatment method, the device and method is simple,
It is easy to operate, it can ensure that the thermal effectiveness of rail.
The technical scheme adopted by the invention is that:
A kind of heat-treatment of rail device, including heat treatment mechanism, water supply mechanism, gas supply mechanism, main frame and for placing
The rail placement mechanism of rail；
The heat treatment mechanism includes pressure stabilizing bellows, the pressure stabilizing bellows by small ventilation duct respectively with upper bellows, leeward
Case, left bellows, the connection of right bellows, the upper bellows, left bellows, are equipped with first jet on right bellows at lower bellows；The of upper bellows
One nozzle is placed in the surface of rail, and the first jet of lower bellows is placed in the underface of rail, and the first jet of upper bellows, under
The central axes of the first jet of bellows are overlapped with the central axes of rail；The first jet pair of the first jet of left bellows, right bellows
Claim the two sides that rail is set；
The water supply mechanism, gas supply mechanism are connect with pressure stabilizing risk respectively；The rail placement mechanism is placed in main frame.
The rail that will warm up complete austenitizing is manually placed in carrier platform by machinery, and rail begins to cool temperature
It is 850-650 DEG C, wind pressure is 20-40KPa in pressure stabilizing bellows, and wind pressure is 15-30KPa in left bellows, right bellows, in upper bellows
Wind pressure is 15-30KPa, and wind pressure is 15-30KPa in lower bellows, and it is 150-350 DEG C that rail, which terminates cooling temperature, then naturally cold
But to room temperature.
According to the above scheme, the water supply mechanism includes sequentially connected water tank, water pump, water main, high-temperature atomizing nozzle, institute
High-temperature atomizing nozzle is stated to be placed in pressure stabilizing bellows；Water pressure gauge, hydraulic control valve are equipped on water main, by adjusting hydraulic pressure control
Valve realizes the control of hydraulic pressure in water main；The structure simply, conveniently provides water mist for the entire device that fills.
According to the above scheme, the gas supply mechanism includes sequentially connected air compressor, main ventilation pipe, the main ventilation pipe
It is connected to pressure stabilizing bellows；It is equipped with main control valve in main ventilation pipe, can control the wind pressure in main ventilation pipe and pressure stabilizing bellows；It should
Structure is simple, provides gas to facilitate for whole device.
According to the above scheme, be equipped with upper support bar and lower support bar in the main frame, left bellows, right bellows by screw rod,
Nut is fixed on upper support bar, on lower support bar；The upper support bar and lower support bar are equipped with horizontal concrete chute, by adjusting spiral shell
The position adjustment of left bellows, right bellows is realized in female fixation position, adjusts the first jet of left and right bellows and Rail Surface distance
Adjusting range is 20-40mm.The structure is moved easily left bellows, right bellows, keeps the thermal effectiveness of rail more preferable.
According to the above scheme, the rail placement mechanism includes carrier platform, and the carrier platform is placed on lower support bar；It should
Structure facilitates fixed rail, improves the thermal effectiveness of rail.
According to the above scheme, the upper support bar is equipped with for testing the infrared radiation thermometer in the middle part of rail tread；Infrared survey
The temperature probe and horizontal direction of Wen Yi is in 45° angle degree.To facilitate the heat treatment process for accurately controlling rail.
According to the above scheme, the upper bellows are connect by rubber hose with upcast ventilation pipe, and lower bellows are by rubber hose under
Air hose connection, left bellows are connect by rubber hose with left air hose, right bellows pass through rubber hose and connect with right air hose, it is described on
Air hose, lower air conduit, Zuo Fengguan, right air hose are connected to small ventilation duct；Be in the wind pipe, lower air conduit, Zuo Fengguan, be equipped on right air hose
Partial pressure table divides control valve, can realize the wind pressure control in left bellows, right bellows, upper bellows and lower bellows by control valve
System.The structure can improve thermal effectiveness, and keep total more stable.
According to the above scheme, the diameter of the high pressure atomizing nozzle is 1-3mm；The first jet is equipped with multiple nozzles,
The spacing of adjacent nozzle center line is 10-30mm, and the diameter of nozzle is 5-8mm.Above structure can improve thermal effectiveness.
According to the above scheme, the first jet of left bellows, right bellows first jet face rail head of rail circular arc, and left wind
The first jet of case, the center line of first jet of right bellows and the vertical range of rail head plane are 10-16mm.Above structure energy
Improve thermal effectiveness.
According to the above scheme, the first jet distribution arrangement and rail longitudinal one of left bellows, right bellows, upper bellows and lower bellows
It causes, first jet internal structure is cylinder.
According to the above scheme, main frame is the hollow frame of cuboid；Carrier platform is strip carrier platform, the length is
100-1000mm, for placing and positioning rail, the vertical axis of symmetry of rail and the vertical symmetry overlapping of axles of main frame；Pressure stabilizing wind
Case is provided with pressure gauge, can show the wind pressure value in pressure stabilizing bellows.
The present invention also provides a kind of methods for carrying out heat-treatment of rail using above-mentioned heat-treatment of rail device, including walk as follows
It is rapid:
By the fixation position of adjusting nut, the first jet of left and right bellows is adjusted at a distance from Rail Surface；
By adjusting main control valve, make wind pressure 20-40KPa in pressure stabilizing bellows；Divide control valve by adjusting, makes left wind
Wind pressure is 15-30KPa in case, right bellows, and wind pressure is 15-30KPa in upper bellows, and wind pressure is 15-30KPa in lower bellows；Pass through
Hydraulic control valve is adjusted, hydraulic pressure 0-0.5MPa in water main is made；
Rail in austenitic state is placed in carrier platform, the temperature of infrared radiation thermometer measurement rail tread is utilized
Angle value opens air compressor and/or water pump after rail is air-cooled to 850-650 DEG C, by adjusting hydraulic control valve, master control
Valve processed divides control valve, realizes that spraying, spray wind perhaps sprays wind Discrete control compressed air by spraying or steam fog passes through first jet
Uniform and stable coolant flow field is formed in Rail Surface, when rail tread temperature reaches 150-350 DEG C, closes air compression
Machine, water pump, rail are air-cooled to room temperature, and the rail in austenitic state is changed into rapidly Fine pearlite.
The beneficial effects of the present invention are:
Spraying, spray wind can be realized by setting water supply mechanism, gas supply mechanism or sprays the Alternative of wind Discrete control by spraying
Combination makes whole device be suitable for the rail of various specifications section；
Pressure stabilizing bellows can stablize with equilibrium air pressure and water mist, facilitate water mist and air and uniformly mix and stability contorting；
The spray wind or misting cooling Flow Field Distribution that the present invention is formed are uniform and stable, and cooling velocity is suitable for that can will be in Austria
The rail of family name's body state is changed into rapidly Fine pearlite, improves rail strength, hardness and wearability；
It is structurally reasonable, easy to use, standard can be provided for heat-treatment of rail production technology optimization and new product process exploitation
Really, scientific test technology analog parameter.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the schematic view of the front view of heat-treatment of rail device of the present invention；
Fig. 2 is the overlooking structure diagram of heat-treatment of rail device of the present invention；
Fig. 3 is the left view structural representation of heat-treatment of rail device of the present invention；
Fig. 4 is the setting schematic diagram of rail and first jet；
Wherein: 1, main frame, 2, air compressor, 3, main ventilation pipe, 4, main control valve, 5, pressure stabilizing bellows, 6, principal pressure
Table, 7, Zuo Fengguan, 8, upcast ventilation pipe, 9, lower air conduit, 10, divide control valve, 11, partial pressure table, 12, upper bellows, 13, left bellows, 14,
Lower bellows, 15, rubber hose, 16, first jet, 17, nut, 18, carrier platform, 19, rail, 20, infrared radiation thermometer, 21,
High-temperature atomizing nozzle, 22, water main, 23, water tank, 24, water pump, 25, hydraulic control valve, 26, water pressure gauge, 27, right air hose, 28,
Right bellows, 29, small ventilation duct, 30, upper support bar, 31, lower support bar.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Referring to figures 1-4, embodiment 1, a kind of heat-treatment of rail device, including heat treatment mechanism, water supply mechanism, air feeder
Structure, main frame 1 and the rail placement mechanism for placing rail 19.Heat treatment mechanism includes the pressure stabilizing bellows with principal pressure table 6
5, pressure stabilizing bellows 5 are connect with upper bellows 12, lower bellows 14, left bellows 13, right bellows 28 respectively by small ventilation duct 29, the windward
Case 12, left bellows 13, is equipped with first jet 16 on right bellows 28 at lower bellows 14；The first jet 16 of upper bellows 12 is placed in steel
The surface of rail 19, the first jet 16 of lower bellows 14 are placed in the underface of rail 19, and the first jet 16 of upper bellows 12, under
The central axes of the first jet 16 of bellows 14 are overlapped with the central axes of rail 19；First jet 16, the right bellows 28 of left bellows 13
First jet 16 be symmetricly set on the two sides of rail 19；Upper bellows 12 are connect by rubber hose 15 with upcast ventilation pipe 8, lower bellows
14 are connect by rubber hose 15 with lower air conduit 9, left bellows 13 are connect by rubber hose 15 with left air hose 7, right bellows 28 are logical
It crosses rubber hose 15 to connect with right air hose 27, upcast ventilation pipe 7, lower air conduit 9, Zuo Fengguan 7, right air hose 27 are connected to small ventilation duct 29；
Be in the wind pipe 8, lower air conduit 9, Zuo Fengguan 7, be equipped with partial pressure table 11 on right air hose 27, divide control valve 10.Water supply mechanism includes
Sequentially connected water tank 23, water pump 24, water main 22, high-temperature atomizing nozzle 21, high-temperature atomizing nozzle 21 are placed in pressure stabilizing bellows 5
It is interior；It is equipped with water pressure gauge 26, hydraulic control valve 25 on water main 22, by adjusting hydraulic control valve 25, controls in water main 22
Water pressure, to realize the control of water mist uninterrupted, water mist is blown into left and right air hose, upcast ventilation pipe 8 and leeward by compressed air
In pipe 9, cooling steam fog is formed.Gas supply mechanism includes sequentially connected air compressor 2, main ventilation pipe 3, main ventilation pipe 3 and steady
Bellows 5 are pressed to be connected to, main ventilation pipe 3 is equipped with main control valve 4.Rail placement mechanism includes carrier platform 18, and carrier platform 18 is set
In in main frame 1, the vertical axis of symmetry of rail 19 and the vertical symmetry overlapping of axles of main frame 1.Main frame 1 is the hollow of cuboid
Frame structure is welded to form by angle steel, interior to be equipped with upper support bar 30 and lower support bar 31, and carrier platform 18 is placed in lower support bar
On 31, left bellows 13, right bellows 28 pass through screw rod, nut 17 is fixed on upper support bar 30, on lower support bar 31；Upper support bar 30
Horizontal concrete chute is equipped with lower support bar 31, and the position of left bellows 13, right bellows 28 is realized by the fixation position of adjusting nut 17
Adjustment is set, the first jet 16 and 19 surface distance adjustable range 20-40mm of rail of left and right bellows are made.It is set on upper support bar 30
Have for the infrared radiation thermometer 20 in the middle part of 19 tyre tread of tested steel rail；The temperature probe and horizontal direction of infrared radiation thermometer 20 are in 45 °
Angle.
21 diameter of high-temperature atomizing nozzle is 1mm, generates water mist by internal and external pressure difference；The aperture of nozzle in first jet 16
For 6mm, adjacent nozzle spacing is 10mm；The nozzle and 19 surface distance of rail of the first jet 16 of upper lower bellows are 30mm, left
The center line of the nozzle of the first jet 16 of right bellows and the vertical range H of rail head plane are 16mm.
Before rail sprays wind heat treatment test, technological parameter setting is carried out, by the fixation position of adjusting nut 17, is adjusted
The first jet 16 of left and right bellows is at a distance from 19 surface of rail.Air compressor 2 is opened, by adjusting main control valve 4 and dividing
Control valve 10, control 5 wind pressure of pressure stabilizing bellows are 30KPa, and wind pressure is 20KPa in the bellows of left and right, and wind pressure is in upper bellows 12
22KPa, wind pressure is 20KPa in lower bellows 14, closes air compressor 2.The steel of austenitic state will be in using mechanical clamp
Rail 19 is placed in carrier platform 18, and the temperature value of 19 tyre tread of rail is measured using infrared radiation thermometer 20, after being air-cooled to 800 DEG C,
Air compressor 2 and water pump 24 are opened, hydraulic control valve 25 to 0.5MPa, compressed air or steam fog is adjusted and passes through first jet
16 form uniform and stable coolant flow field on 19 surface of rail, when 19 wheel tread temperature of rail reaches 300 DEG C, close air compression
Machine 2 and water pump 24, rail 19 are air-cooled to room temperature, and the rail in austenitic state is changed into rapidly fine pearlite group
It knits.
Embodiment 2, with embodiment 1 except that: the diameter of high-temperature atomizing nozzle 21 is 3mm, is sprayed in first jet 16
The aperture of mouth is 8mm, and adjacent nozzle spacing is 20mm, and nozzle and 19 surface distance of rail of the first jet 16 of upper lower bellows are
30mm, the center line of the nozzle of the first jet 16 of left and right bellows and the vertical range of rail head plane are 10mm.
Air compressor 2 is opened, by adjusting main control valve 4 and dividing control valve 10, control 5 wind pressure of pressure stabilizing bellows is
25KPa, wind pressure is 15KPa in the bellows of left and right, and wind pressure is 16KPa in upper bellows 12, and wind pressure is 15KPa in lower bellows 14, is closed
Air compressor 2.The rail 19 in austenitic state is placed in carrier platform 18 using mechanical clamp, is air-cooled to 750
After DEG C, air compressor 2 and water pump 24 are opened, hydraulic control valve 25 is adjusted to 0.3MPa, starts to accelerate cooling, be stepped on to rail 19
When face temperature reaches 250 DEG C, closes air compressor 2 and water pump 24, rail 19 are air-cooled to room temperature.
Embodiment 3, with embodiment 1 except that: the diameter of high-temperature atomizing nozzle 21 is 1.5mm, in first jet 16
The aperture of nozzle is 5mm, and adjacent nozzle spacing is 15mm, the nozzle and 19 surface distance of rail of the first jet 16 of upper lower bellows
For 40mm, the center line of the nozzle of the first jet 16 of left and right bellows and the vertical range of rail head plane are 12mm.
Air compressor 2 is opened, by adjusting main control valve 4 and dividing control valve 10, control 5 wind pressure of pressure stabilizing bellows is
40KPa, wind pressure is 25KPa in the bellows of left and right, and wind pressure is 30KPa in upper bellows 12, and wind pressure is 20KPa in lower bellows 14, is closed
Air compressor 2.The rail 19 in austenitic state is placed in carrier platform 18 using mechanical clamp, is air-cooled to 670
After DEG C, air compressor 2 is opened, starts to accelerate cooling, when 19 wheel tread temperature of rail reaches 200 DEG C, closes air compressor
2, rail 19 is air-cooled to room temperature.
Embodiment 4, with embodiment 1 except that: the diameter of high-temperature atomizing nozzle 21 is 2mm, is sprayed in first jet 16
The aperture of mouth is 7mm, and adjacent nozzle spacing is 30mm, and nozzle and 19 surface distance of rail of the first jet 16 of upper lower bellows are
20mm, the center line of the nozzle of the first jet 16 of left and right bellows and the vertical range of rail head plane are 13mm.
Air compressor 2 is opened, by adjusting main control valve 4 and dividing control valve 10, control 5 wind pressure of pressure stabilizing bellows is
40KPa, wind pressure is 30KPa in the bellows of left and right, and wind pressure is 25KPa in upper bellows 12, and wind pressure is 25KPa in lower bellows 14, is closed
Air compressor 2.The rail 19 in austenitic state is placed in carrier platform 18 using mechanical clamp, is air-cooled to 720
After DEG C, air compressor 2 is opened, starts to accelerate cooling, when 19 wheel tread temperature of rail reaches 150 DEG C, closes air compressor
2, rail 19 is air-cooled to room temperature.
Embodiment 5, with embodiment 1 except that: the diameter of high-temperature atomizing nozzle 21 is 1mm, is sprayed in first jet 16
The aperture of mouth is 6mm, and adjacent nozzle spacing is 20mm, and nozzle and 19 surface distance of rail of the first jet 16 of upper lower bellows are
25mm, the center line of the nozzle of the first jet 16 of left and right bellows and the vertical range of rail head plane are 16mm.
Air compressor 2 is opened, by adjusting main control valve 4 and dividing control valve 10, control 5 wind pressure of pressure stabilizing bellows is
30KPa, wind pressure is 20KPa in the bellows of left and right, and wind pressure is 20KPa in upper bellows 12, and wind pressure is 20KPa in lower bellows 14, is closed
Air compressor 2.The rail 19 in austenitic state is placed in carrier platform 18 using mechanical clamp, is air-cooled to 850
After DEG C, air compressor 2 is opened, starts compressed air cooling, when 19 wheel tread temperature of rail reaches 650 DEG C, water pump 24 is opened, adjusts
Hydraulic control valve 25 starts Areoponics culture, when 19 wheel tread temperature of rail reaches 250 DEG C, closes air compressor 2 to 0.3MPa
With water pump 24, rail 19 is air-cooled to room temperature.
Embodiment 6, with embodiment 1 except that: the diameter of high-temperature atomizing nozzle 21 is 2mm, is sprayed in first jet 16
The aperture of mouth is 7mm, and adjacent nozzle spacing is 15mm, and nozzle and 19 surface distance of rail of the first jet 16 of upper lower bellows are
30mm, the center line of the nozzle of the first jet 16 of left and right bellows and the vertical range of rail head plane are 12mm.
Air compressor 2 is opened, by adjusting main control valve 4 and dividing control valve 10, control 5 wind pressure of pressure stabilizing bellows is
35KPa, wind pressure is 25KPa in the bellows of left and right, and wind pressure is 25KPa in upper bellows 12, and wind pressure is 25KPa in lower bellows 14, is closed
Air compressor 2.The rail 19 in austenitic state is placed in carrier platform 18 using mechanical clamp, is air-cooled to 800
After DEG C, air compressor 2 is opened, starts compressed air cooling, when 19 wheel tread temperature of rail reaches 680 DEG C, adjusting divides control valve 10,
Controlling wind pressure in the bellows of left and right is 20KPa, and wind pressure is 20KPa in upper bellows 12, and wind pressure is 20KPa in lower bellows 14, is beaten simultaneously
Boiled water pump 24 adjusts hydraulic control valve 25 to 0.4MPa, starts Areoponics culture, when 19 wheel tread temperature of rail reaches 200 DEG C, close
Air compressor 2 and water pump 24 are closed, rail 19 is air-cooled to room temperature.
Each rail used in the examples is U75V hot rolled rail, and the rail used in comparative example is common hot rolling U75V steel
Rail, for comparative example in addition to rail difference, other parameters are same as Example 6.
Rail property data statistics of each embodiment and comparative example of table 1 through Overheating Treatment
| Tensile strength (MPa) | Elongation percentage (MPa) | Tyre tread hardness (HB) | |
| Embodiment 1 | 1256 | 12 | 381 |
| Embodiment 2 | 1250 | 12 | 381 |
| Embodiment 3 | 1260 | 13 | 379 |
| Embodiment 4 | 1244 | 12 | 374 |
| Embodiment 5 | 1257 | 11 | 376 |
| Embodiment 6 | 1248 | 12 | 374 |
| Comparative example | 1086 | 13 | 302 |
| Heat-treated rail standard requirements | ≥1180 | ≥10 | 340-400 |
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (7)
1. a kind of heat-treatment of rail device, it is characterised in that: including heat treatment mechanism, water supply mechanism, gas supply mechanism, main frame and
For placing the rail placement mechanism of rail；
The heat treatment mechanism includes pressure stabilizing bellows, the pressure stabilizing bellows by small ventilation duct respectively with upper bellows, lower bellows, a left side
Bellows, the connection of right bellows, the upper bellows, left bellows, are equipped with first jet on right bellows at lower bellows；First spray of upper bellows
Mouth is placed in the surface of rail, and the first jet of lower bellows is placed in the underface of rail, and the first jet of upper bellows, lower bellows
The central axes of first jet be overlapped with the central axes of rail；The first jet of left bellows, right bellows first jet symmetrically set
It sets in the two sides of rail；
The water supply mechanism, gas supply mechanism are connect with pressure stabilizing bellows respectively；The rail placement mechanism is placed in main frame；
The water supply mechanism includes sequentially connected water tank, water pump, water main, high-temperature atomizing nozzle, the high-temperature atomizing nozzle
It is placed in pressure stabilizing bellows；Water pressure gauge, hydraulic control valve are equipped on water main；
The gas supply mechanism includes sequentially connected air compressor, main ventilation pipe, and the main ventilation pipe is connected to pressure stabilizing bellows；
Main control valve is equipped in main ventilation pipe；
The upper bellows are connect by rubber hose with upcast ventilation pipe, lower bellows pass through rubber hose connect with lower air conduit, left bellows
It is connect by rubber hose with left air hose, right bellows are connect by rubber hose with right air hose, the upcast ventilation pipe, lower air conduit, a left side
Air hose, right air hose are connected to small ventilation duct；Be in the wind pipe, lower air conduit, Zuo Fengguan, be equipped with partial pressure table, sub-control on right air hose
Valve processed；
The diameter of the high-temperature atomizing nozzle is 1-3mm；It include multiple nozzles on the first jet, adjacent nozzle center line
Spacing is 10-30mm, and the diameter of nozzle is 5-8mm.
2. heat-treatment of rail device according to claim 1, it is characterised in that: be equipped in the main frame upper support bar and
Lower support bar；Left bellows are fixed on upper support bar by screw rod, nut；Right bellows are fixed on lower support by screw rod, nut
On bar.
3. heat-treatment of rail device according to claim 2, it is characterised in that: the rail placement mechanism includes objective table
Frame, the carrier platform are placed on lower support bar.
4. heat-treatment of rail device according to claim 3, it is characterised in that: the upper support bar is equipped with for testing
Infrared radiation thermometer in the middle part of rail tread.
5. heat-treatment of rail device according to claim 3, it is characterised in that: set on the upper support bar and lower support bar
There is horizontal concrete chute, by adjusting nut, makes the mobile 20-40mm of left bellows, right bellows.
6. heat-treatment of rail device according to claim 1, it is characterised in that: the first jet of left bellows, right bellows
The circular arc of first jet face rail head of rail, and the center line and rail head of the first jet of the first jet of left bellows, right bellows
The vertical range of plane is 10-16mm.
7. a kind of method for carrying out heat-treatment of rail using heat-treatment of rail device as claimed in any one of claims 1 to 6, special
Sign is to include the following steps:
By the fixation position of adjusting nut, the first jet of left and right bellows is adjusted at a distance from Rail Surface；
By adjusting main control valve, make wind pressure 20-40KPa in pressure stabilizing bellows；Divide control valve by adjusting, makes left bellows, the right side
Wind pressure is 15-30KPa in bellows, and wind pressure is 15-30KPa in upper bellows, and wind pressure is 15-30KPa in lower bellows；
Rail in austenitic state is placed in carrier platform, the temperature of infrared radiation thermometer measurement rail tread is utilized
Value opens air compressor and/or water pump after rail is air-cooled to 850-650 DEG C, by adjusting hydraulic control valve, main control
Valve divides control valve, realizes that spraying, spray wind perhaps sprays wind Discrete control compressed air or steam fog by spraying and exists by first jet
Rail Surface forms uniform and stable coolant flow field, when rail tread temperature reaches 150-350 DEG C, closing air compressor,
Water pump, rail are air-cooled to room temperature, and the rail in austenitic state is changed into rapidly Fine pearlite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710448497.7A CN107130098B (en) | 2017-06-14 | 2017-06-14 | Heat-treatment of rail device and heat treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710448497.7A CN107130098B (en) | 2017-06-14 | 2017-06-14 | Heat-treatment of rail device and heat treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107130098A CN107130098A (en) | 2017-09-05 |
| CN107130098B true CN107130098B (en) | 2019-07-12 |
Family
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| CN107400764B (en) * | 2017-09-19 | 2023-03-31 | 辽宁科技大学 | Whole air-cooled quenching experimental apparatus of rail |
| CN108384934A (en) * | 2018-03-14 | 2018-08-10 | 盐城圣奥热处理有限公司 | A kind of glowing furnace used for metal thermal treatment |
| CN108342563A (en) * | 2018-05-18 | 2018-07-31 | 中冶南方武汉钢铁设计研究院有限公司 | A kind of rail heat treatment machine of adaptive more specification rail |
| CN108342552A (en) * | 2018-05-18 | 2018-07-31 | 中冶南方武汉钢铁设计研究院有限公司 | A kind of rail burning optimization on line device and technique |
| CN112375877B (en) * | 2020-11-26 | 2022-05-27 | 辽宁科技大学 | Hundred-meter steel rail circulating continuous integral air-jet quenching experimental device |
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