CN106282520A - A kind of torsion-bar spring thermomechanical treatment process - Google Patents

A kind of torsion-bar spring thermomechanical treatment process Download PDF

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Publication number
CN106282520A
CN106282520A CN201610634448.8A CN201610634448A CN106282520A CN 106282520 A CN106282520 A CN 106282520A CN 201610634448 A CN201610634448 A CN 201610634448A CN 106282520 A CN106282520 A CN 106282520A
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torsion
bar spring
quenching
bar
heating
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CN106282520B (en
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周朝伟
周丽肖
朱勇
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ZHEJIANG MASITE AUTOMOBILE PARTS Co Ltd
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ZHEJIANG MASITE AUTOMOBILE PARTS Co Ltd
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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
    • C21D9/02—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for springs
    • 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
    • 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
    • C21D1/34—Methods of heating
    • C21D1/42—Induction heating
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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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)
  • Springs (AREA)

Abstract

The invention discloses a kind of torsion-bar spring thermomechanical treatment process, pass sequentially through blank-making technology, induction heating technology, quenching straightening technology, tempering process and post processing and obtain torsion-bar spring finished product.One torsion-bar spring thermomechanical treatment process of the present invention, the mode using induction heating technology to combine with multistation quenching straightening technology carries out heat treatment and the correction of torsion-bar spring, capture a difficult problem for quenching distortion bending during torsion-bar spring manufactures, torsion-bar spring is under the effect of quenching straightener mechanical rotational force, reach the purpose of limit quenching limit alignment, radial beat eccentricity≤the 0.6mm of torsion bar after alignment, ratio can reach >=the good effect of 95%, for having uniformly, the phase transition temperature of the globular carbide of tiny distribution, it is made without insulation, crystal grain can be kept not grow up, crystal grain now is tiny, uniformly, etc. shaft-like, serve the effect pining down torsion-bar spring distortion, thus ensure that torsion-bar spring obtains less distortion, there is under the effect of mechanical force good elasticity simultaneously.

Description

A kind of torsion-bar spring thermomechanical treatment process
[technical field]
The present invention relates to the technical field of torsion-bar spring heat treatment, particularly to a kind of torsion-bar spring thermomechanical treatment work Skill.
[background technology]
Torsion-bar spring, as a kind of flexible member, is widely used in the suspension of Hyundai Motor, at car, lorry and more Wild automobile there is employing.Compared with leaf spring, torsion-bar spring has a series of advantages: torsion-bar spring unit mass energy content Height, thus car mass can be reduced, material can be saved again；It is fixed on vehicle frame due to torsion-bar spring again, the other end and suspension Control arm connects, and reaches cushioning effect by the torsional moment of torsion bar, is conducive to improving vehicle running smoothness；Before being applied to When driving the front suspension of automobile, torsion-bar spring can be longitudinally arranged, for the swinging half-axle slot milling of front driving axle.But torsion bar bullet Spring is relatively tight to Materials And Process Requirement, and manufacture difficulty is big and cost is of a relatively high.
Torsion-bar spring is subject to the moment energy storage axial workpiece of unidirectional load, combines production technology choosing according to the height of carrying With required steel grade.General manufacturing process route: blank → forging is thick → annealing → end processing → quenching → be tempered → correct → Bead → strong torsion process → surface spraying → inspection → antirust treatment → packaging.Affecting torsion-bar spring factors of limit life is material And heat treatment, these two aspects is domestic and the most all also has a certain distance, and especially on heat treatment, quenching distortion and correction are to turn round Two hang-ups in the manufacture of bar spring, in order to capture a difficult problem for quenching distortion bending, it is necessary to proposes a kind of torsion-bar spring deformation Technology for Heating Processing.
[summary of the invention]
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, it is provided that a kind of torsion-bar spring thermomechanical treatment work Skill, it aims to solve the problem that in prior art that in torsion-bar spring production process, quenching distortion and correction process difficulty are big, torsion-bar spring Thermal treatment quality is low, causes the technical problem that service life is shorter.
For achieving the above object, the present invention proposes a kind of torsion-bar spring thermomechanical treatment process, includes successively walking as follows Rapid:
A) blank-making technology: select the torsion bar material after modifier treatment to cut off by process stipulation length, use end heating arrangement Torsion bar material being heated to 950～l000 DEG C, uses upsetter jumping-up to process, after jumping-up, the end annealing furnace of torsion bar material enters Row heating slow cooling, annealing furnace initial temperature is 900～l000 DEG C, and cooling rate is 100～200 DEG C/h, finally obtains torsion bar bullet Spring blank；
B) induction heating technology: torsion-bar spring blank prepared for step a) is placed on step-by-step movement feed arrangement, passes through Step-by-step movement feed arrangement is automatically fed in the V-groove of through heating rotary apparatus, hoisting mechanism risen by torsion-bar spring blank Double V-shaped top position on through heating rotary apparatus, presss from both sides by the V-type at through heating rotary apparatus two ends is top Tightly, wherein the V-type of one end is top is rotated by frequency conversion motor, and another V-type is top senses the longitudinal direction that adjustment two V-types are top Length, torsion-bar spring blank rotary is moved on to sense the lower section of heater and enters by the transmitting device being made up of screw mandrel guide rail and servomotor Row rotary inductive through heating, then by screw mandrel module rapid decrease and by feed mechanism by torsion-bar spring blank send into quenching First station in straightener carries out the alignment that quenches；
C) quenching straightening technology: the torsion-bar spring blank after step b) sensing through heating processes enters quenching alignment Machine, quenching straightener is provided with five stations, each station is provided with roll, and each roll is provided with several profilings Groove, torsion-bar spring blank enters the roll inner chamber on quenching first station of straightener, and with torsion-bar spring blank shape kissing After the most rapidly screw in oil-quenching tank inner edge quenching limit alignment, carry out phase transformation surpass flow process；
D) tempering process: the torsion-bar spring blank after step c) processes carries out temper, finally by the material after cooling Material carries out shot peening strengthening；
E) post processing: torsion-bar spring blank is after tempering, bead, to torsion-bar spring blank before surface spraying is processed Apply one and carry out strong torsion process more than the moment of torsion of elastic pole root, make surface stress be more than yield limit, but less than strength degree, Section metallic produce plastic deformation and improve the elastic limit of torsion-bar spring, strong torsion process after carry out successively surface spraying, inspection, Antirust treatment, it is packaged to be torsion-bar spring finished product.
As preferably, the torsion bar material in described step a) uses original structure at the 60Si of 2～3 grades2Mn spring steel Make.
As preferably, the rotary speed of the described frequency conversion motor in step b) is 60～200r/min, described sensing During the heating of heater, temperature reaches by controlling current ratio, and the depth of penetration is adjusted than the size of resistance according to permeability Whole, on the premise of ensureing to add thermal break-through, the heating-up temperature of sensing heater is 850～900 DEG C, heat time heating time 15～20s/ Root, electrical heating power is 150～200KW, and frequency is 8KHz.
As preferably, the described through heating rotary apparatus in step b) is horizontal with quenching straightener.
As preferably, at work, three stations carry out rolling press quenching to described step c) quenching straightener, and the 4th Individual station is room when rapid discharge torsion-bar spring blank, and the 5th station is awaited orders feeding, accepts next cycle of operation.
As preferably, the roll arranged on each station in described step c) is separately mounted to the roll on corresponding station On support, roller bracket being provided with the profiling circular groove for active quenching oil mobility, described roller bracket is by rotating Spring controls the size of pressure.
As preferably, described quenching oil is loaded in oil-quenching tank, and described quenching oil uses inorganic water preparation quenching oil.
As preferably, the roll (31) in described step c) is made up of topping roll and bottom roll, and topping roll does floating pressure Power rotates, and bottom roll is the fixing rotating roller supported.
As preferably, the described temperature in step d) is 500～600 DEG C, and temperature retention time is 2～3h.
Beneficial effects of the present invention: compared with prior art, a kind of torsion-bar spring thermomechanical treatment work that the present invention provides Skill, the mode using induction heating technology to combine with multistation quenching straightening technology carries out heat treatment and the school of torsion-bar spring Just, capturing a difficult problem for quenching distortion bending during torsion-bar spring manufactures, torsion-bar spring is in the effect of quenching straightener mechanical rotational force Under, reach the purpose of limit quenching limit alignment, the radial beat eccentricity≤0.6mm of torsion bar after alignment, ratio can reach >=95% Good effect, for having the phase transition temperature of the globular carbide of distribution uniform, tiny, it is made without insulation, the most permissible Keep crystal grain do not grow up, crystal grain now be tiny, uniform, etc. shaft-like, serve pin down torsion-bar spring distortion effect, from And ensure that torsion-bar spring obtains less distortion, there is under the effect of mechanical force good elasticity simultaneously.
Inventive feature and advantage will combine accompanying drawing by embodiment and be described in detail.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the embodiment of the present invention a kind of torsion-bar spring thermomechanical treatment process device therefor；
Fig. 2 is the structural representation of through heating rotary apparatus in the embodiment of the present invention.
In figure: 1-through heating rotary apparatus, 11-V type are top, 12-frequency conversion motor, 13-sense heater, 2-feeder Structure, 3-quench straightener, 31-roll, 32-topping roll, 33-bottom roll.
[detailed description of the invention]
For making the object, technical solutions and advantages of the present invention of greater clarity, below by accompanying drawing and embodiment, right The present invention is further elaborated.However, it should be understood that specific embodiment described herein is only in order to explain this Bright, it is not limited to the scope of the present invention.Additionally, in the following description, eliminate the description to known features and technology, with Avoid unnecessarily obscuring idea of the invention.
Refering to Fig. 1 and Fig. 2, the embodiment of the present invention provides a kind of torsion-bar spring thermomechanical treatment process, includes as follows successively Step:
A) blank-making technology: select the torsion bar material after modifier treatment to cut off by process stipulation length, use end heating arrangement Torsion bar material being heated to 950～l000 DEG C, uses upsetter jumping-up to process, after jumping-up, the end annealing furnace of torsion bar material enters Row heating slow cooling, annealing furnace initial temperature is 900～l000 DEG C, and cooling rate is 100～200 DEG C/h, finally obtains torsion bar bullet Spring blank.
Wherein, torsion bar material uses original structure at the 60Si of 2～3 grades2Mn spring steel is made.
B) induction heating technology: torsion-bar spring blank prepared for step a) is placed on step-by-step movement feed arrangement, passes through Step-by-step movement feed arrangement is automatically fed in the V-groove of through heating rotary apparatus 1, hoisting mechanism risen by torsion-bar spring blank Double V-shaped top position on through heating rotary apparatus 1, is carried out by the V-type top 11 at through heating rotary apparatus 1 two ends Clamping, wherein the V-type of one end top 11 is rotated by frequency conversion motor 12, and another V-type top 11 can sense adjustment two V-type tops The longitudinal length of point 11, torsion-bar spring blank rotary is moved on to sensing heating by the transmitting device being made up of screw mandrel guide rail and servomotor The lower section of device 13 carries out rotary inductive through heating, then by screw mandrel module rapid decrease and by feed mechanism 2 by torsion bar bullet Spring blank is sent in first station in quenching straightener 3 and is carried out the alignment that quenches.
Wherein, the rotary speed of frequency conversion motor 12 is 60～200r/min, the temperature during heating of described sensing heater 13 Spending and reached by control current ratio, the depth of penetration adjusts than the size of resistance according to permeability, adds thermal break-through in guarantee On the premise of, sensing heater 13 heating-up temperature be 850～900 DEG C, heat time heating time 15～20s/ root, electrical heating power is 150～200KW, frequency is 8KHz.
In embodiments of the present invention, for the work that preferably matches, through heating rotary apparatus 1 and quenching straightener 3 It is horizontal.
Because of 60Si2The original structure of Mn spring steel is at 2～3 grades, and it is by globular pearlite group tiny, equally distributed Become, adapt to the induction heating technology in quick high-temp, the firing rate when once sensing through heating is the fastest, ferrite from Cementite structural transformation is that the temperature of austenite is the highest, i.e. perlitic transformation is that the temperature range of austenite is the highest, and The time formed is the shortest, and crystal grain is the thinnest, and this is highly beneficial for the heating of torsion bar, can improve torsion bar simultaneously Obdurability and useful life longevity.
For torsion bar, owing to the profile of torsion bar is different elongated shape rod members excessive for R, two end is respectively gradually Burst at the seams spline, and its hardness and metallographic structure must reach technology requirement, particularly spline and differ greatly with body of rod sectional area, therefore adopts Having great difficulty with once sensing through heating, the longitudinal length of the sensing heater 13 in the embodiment of the present invention is adjustable, Therefore, in heating process, sensing heater 13 is identical with the length of torsion-bar spring, can make the torsion bar energy of whole different profiles Enough homogeneous heating, will not make again underheat or the spline position overheated structure of centre bore appearance when heating at torsion-bar spring two ends, There is the preferable suitability.
C) quenching straightening technology: the torsion-bar spring blank after step b) sensing through heating processes enters quenching straightener 3, quenching straightener 3 is provided with five stations, each station is provided with roll 31, each roll 31 is provided with several and imitates Shape groove, torsion-bar spring blank enters roll 31 inner chamber on quenching 3 first stations of straightener, and with torsion-bar spring blank shape Screw in the most rapidly the quenching limit alignment of oil-quenching tank inner edge after kissing, carry out phase transformation and surpass flow process.
In embodiments of the present invention, five stations on quenching straightener 3 rotate around same axle center.
Further, at work, three stations carry out rolling press quenching quenching straightener 3, and the 4th station is fast Being room during speed discharge torsion-bar spring blank, the 5th station is awaited orders feeding, accepts next cycle of operation, each station is arranged Roll 31 be separately mounted on the roller bracket on corresponding station, roller bracket is provided with for active quenching oil mobility Profiling circular groove, described roller bracket controls the size of pressure by rotating spring, thus reaches to adjust torsion bar and radially jump The purpose of momentum size.
Wherein, quenching oil is loaded in oil-quenching tank, and described quenching oil uses inorganic water preparation quenching oil.Inorganic water preparation quenches Having broken through on high-carbon spring steel, after quenching, indices meets concerned countries standard, and inorganic water preparation can reduce quenching oil and disappear Consumption, reduces the generation of oil smoke, improves production environment and reduces environmental pollution, and inorganic water preparation can thoroughly solve on rolling pressure quenches technique Certainly oil smoke and the danger caught fire.
Further, roll 31 is made up of topping roll 32 and bottom roll 33, topping roll 32 do floating pressure rotate, under roll Roller 33 is the fixing rotating roller supported.
D) tempering process: the torsion-bar spring blank after step c) processes carries out temper, finally by the material after cooling Material carries out shot peening strengthening.
Wherein, temperature is 500～600 DEG C, and temperature retention time is 2～3h.
Torsion-bar spring clamping rolling quenching is that a kind of hardening heat at austenitizing gradually decreases to martensite transfor mation eventually Thermomechanical treatment during some continuous cooling transformation, belongs to continuous deformation quenching, can be with refined carbides, because carbide is only Should be able to be at crystal boundary and fault location forming core, the sequencing of nucleation site: ferrite → austenite phase boundary → crystal boundary → little angle Degree crystal boundary contact → low-angle boundary → indivedual dislocations.The deformation of austenite, particularly within the temperature range of carbide precipitate Deformation, and when degree of deformation reaches to a certain degree, can cause substantial amounts of low-angle boundary and dislocation at austenite crystal intragranular, thus carbon The forming core of compound is not only on crystal boundary, and also can produce in a large number in crystal boundary, so it is tiny, uniformly, more for generating carbide The distribution dissipated, serves the effect pining down torsion bar distortion, thus ensures that torsion bar obtains less distortion, makes quenching hardness uniform, Quenching stress is little, thus improves inherent quality and the yield of torsion bar heat treatment.
E) post processing: torsion-bar spring blank is after tempering, bead, to torsion-bar spring blank before surface spraying is processed Apply one and carry out strong torsion process more than the moment of torsion of elastic pole root, make surface stress be more than yield limit, but less than strength degree, Section metallic produce plastic deformation and improve the elastic limit of torsion-bar spring, strong torsion process after carry out successively surface spraying, inspection, Antirust treatment, it is packaged to be torsion-bar spring finished product.
One torsion-bar spring thermomechanical treatment process of the present invention, uses induction heating technology and multistation quenching straightening technology The mode combined carries out heat treatment and the correction of torsion-bar spring, captures a difficult problem for quenching distortion bending during torsion-bar spring manufactures, Torsion-bar spring, under the effect of quenching straightener mechanical rotational force, reaches the purpose of limit quenching limit alignment, the footpath of torsion bar after alignment To jerk value≤0.6mm, ratio can reach >=the good effect of 95%, for having the globular carbide of distribution uniform, tiny Phase transition temperature, it be made without insulation, crystal grain so can be kept not grow up, crystal grain now is tiny, uniform, isometry Shape, serve the effect pining down torsion-bar spring distortion, thus ensure that torsion-bar spring obtains less distortion, simultaneously in mechanical force Effect under there is good elasticity.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention Any amendment, equivalent or the improvement etc. made within god and principle, should be included within the scope of the present invention.

Claims (9)

1. a torsion-bar spring thermomechanical treatment process, it is characterised in that: in turn include the following steps:
A) blank-making technology: select the torsion bar material after modifier treatment to cut off by process stipulation length, will turn round with end heating arrangement Bar material is heated to 950～l000 DEG C, uses upsetter jumping-up to process, and after jumping-up, the end annealing furnace of torsion bar material adds Hot slow cooling, annealing furnace initial temperature is 900～l000 DEG C, and cooling rate is 100～200 DEG C/h, finally obtains torsion-bar spring base Material；
B) induction heating technology: torsion-bar spring blank prepared for step a) is placed on step-by-step movement feed arrangement, passes through stepping Formula feed arrangement is automatically fed in the V-groove of through heating rotary apparatus (1), hoisting mechanism risen to by torsion-bar spring blank Double V-shaped top position on through heating rotary apparatus (1), by the V-type at through heating rotary apparatus (1) two ends top (11) Being clamped, wherein the V-type of one end top (11) is rotated by frequency conversion motor (12), and another V-type top (11) can sense Adjusting the longitudinal length of two V-types top (11), the transmitting device being made up of screw mandrel guide rail and servomotor is by torsion-bar spring blank The lower section transferring to sense heater (13) carries out rotary inductive through heating, then by screw mandrel module rapid decrease and by upper Torsion-bar spring blank is sent into and is carried out the alignment that quenches in first station in quenching straightener (3) by material mechanism (2)；
C) quenching straightening technology: the torsion-bar spring blank after step b) sensing through heating processes enters quenching straightener (3), Being provided with five stations in quenching straightener (3), each station is provided with roll (31), each roll (31) is provided with some Individual imitation-shaped groove, torsion-bar spring blank enters roll (31) inner chamber on quenching (3) first stations of straightener, and same torsion-bar spring Screw in the most rapidly the quenching limit alignment of oil-quenching tank inner edge after blank shape kissing, carry out phase transformation and surpass flow process；
D) tempering process: the torsion-bar spring blank after step c) processes carries out temper, is finally entered by the material after cooling Row shot peening strengthening；
E) post processing: torsion-bar spring blank, after tempering, bead, is applied before surface spraying is processed by torsion-bar spring blank One carries out strong torsion process more than the moment of torsion of elastic pole root, makes surface stress be more than yield limit, but less than strength degree, section Metal produces plastic deformation and improves the elastic limit of torsion-bar spring, and strong torsion carries out surface spraying, inspection, antirust successively after processing Process, be packaged to be torsion-bar spring finished product.
2. a kind of torsion-bar spring thermomechanical treatment process as claimed in claim 1, it is characterised in that: in described step a) Torsion bar material uses original structure at the 60Si of 2～3 grades2Mn spring steel is made.
3. a kind of torsion-bar spring thermomechanical treatment process as claimed in claim 1, it is characterised in that: in described step b) The rotary speed of frequency conversion motor (12) is 60～200r/min, and during the heating of described sensing heater (13), temperature is by controlling Current ratio reaches, and the depth of penetration adjusts than the size of resistance according to permeability, on the premise of ensureing to add thermal break-through, and sense The heating-up temperature answering heater (13) is 850～900 DEG C, heat time heating time 15～20s/ root, electrical heating power is 150～200KW, Frequency is 8KHz.
4. a kind of torsion-bar spring thermomechanical treatment process as claimed in claim 1, it is characterised in that: in described step b) Through heating rotary apparatus (1) is horizontal with quenching straightener (3).
5. a kind of torsion-bar spring thermomechanical treatment process as claimed in claim 1, it is characterised in that: described step c) quenching At work, three stations carry out rolling press quenching straightener (3), and the 4th station is when rapid discharge torsion-bar spring blank Being room, the 5th station is awaited orders feeding, accepts next cycle of operation.
6. a kind of torsion-bar spring thermomechanical treatment process as claimed in claim 1, it is characterised in that: every in described step c) The roll (31) arranged on individual station is separately mounted on the roller bracket on corresponding station, roller bracket is provided with for living The profiling circular groove of network quenching oil mobility, described roller bracket controls the size of pressure by rotating spring.
7. a kind of torsion-bar spring thermomechanical treatment process as claimed in claim 6, it is characterised in that: described quenching oil is loaded on In oil-quenching tank, described quenching oil uses inorganic water preparation quenching oil.
8. a kind of torsion-bar spring thermomechanical treatment process as claimed in claim 1, it is characterised in that: in described step c) Roll (31) is made up of topping roll (32) and bottom roll (33), and topping roll (32) does floating pressure and rotates, and bottom roll (33) is solid The fixed rotating roller supported.
9. a kind of torsion-bar spring thermomechanical treatment process as claimed in claim 1, it is characterised in that: in described step d) Temperature is 500～600 DEG C, and temperature retention time is 2～3h.
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CN106939370A (en) * 2017-03-04 2017-07-11 重集团常州华冶轧辊有限公司 A kind of straightening process of high-alloy steel roll
CN107120374A (en) * 2017-03-23 2017-09-01 南京工程学院 A kind of automobile-used torsion-bar spring and its manufacture method
CN107541590A (en) * 2017-10-27 2018-01-05 北京卡特刘科技有限公司 A kind of heat treatment method for alloy spring steel
CN113275414A (en) * 2021-05-08 2021-08-20 德州普利森机床有限公司 Surface quenching and automatic straightening process and device for large-diameter long-specification boring rod
EP3888842A4 (en) * 2018-11-30 2022-01-26 Posco Method for manuacturing torsion beam
CN114606373A (en) * 2022-03-17 2022-06-10 常州三众弹性技术有限公司 Plate spring pressure quenching device and pressure quenching method, and plate spring
CN114653869A (en) * 2022-03-23 2022-06-24 北京少仕科技有限公司 Manufacturing process of torsion shaft
CN114669699A (en) * 2022-03-23 2022-06-28 北京少仕科技有限公司 Torsion shaft manufacturing method
CN114990297A (en) * 2022-06-01 2022-09-02 江苏凯骏机械有限公司 Anti-clamping deformation transfer device for suspension torsion bar quenching process and use method
US12036600B2 (en) 2018-11-30 2024-07-16 Posco Co., Ltd Method for manufacturing torsion beam

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CN106939370A (en) * 2017-03-04 2017-07-11 重集团常州华冶轧辊有限公司 A kind of straightening process of high-alloy steel roll
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