CN106467931A - A kind of method of manufacturing technology of lifting bearer ring performance - Google Patents

A kind of method of manufacturing technology of lifting bearer ring performance Download PDF

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Publication number
CN106467931A
CN106467931A CN201610863629.8A CN201610863629A CN106467931A CN 106467931 A CN106467931 A CN 106467931A CN 201610863629 A CN201610863629 A CN 201610863629A CN 106467931 A CN106467931 A CN 106467931A
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Prior art keywords
bearer ring
ring
minutes
isothermal
bearer
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CN201610863629.8A
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CN106467931B (en
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华林
邓松
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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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
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/58—Oils
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/607—Molten salts
    • 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
    • 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
    • C21D2211/002—Bainite
    • 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
    • C21D2211/008—Martensite

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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)
  • Oil, Petroleum & Natural Gas (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The present invention relates to a kind of method of manufacturing technology of lifting bearer ring performance, comprise the following steps：S1, bearing ring billet is carried out on cold ring rolling mill roll forming；S2, the bearer ring of roll forming is heated to 800～900 DEG C of insulations and carries out austenitizing in 10～20 minutes；Then bearer ring is placed in the prequenching carrying out in 150～250 DEG C of nitric acid salt bath 5～10 minutes to process；S3, the bearer ring processing prequenching are heated to 200～300 DEG C of insulations and carry out isothermal hardening in 15～25 minutes, then isothermal processes 5～10 minutes in 50～100 DEG C of quenching oil；S4, by through means of isothermal quenching bearer ring 150～250 DEG C carry out 1～2 hour lonneals process, then air cooling.The present invention passes through quenching, isothermal hardening, tempering process can significantly improve ballistic work and the fracture toughness of bearer ring.

Description

A kind of method of manufacturing technology of lifting bearer ring performance
Technical field
A kind of the present invention relates to machinery manufacturing technology field, more particularly, it relates to manufacture work of lifting bearer ring performance Process.
Background technology
Produce at present after bearer ring generally goes through forging further quenching+temper and carry out polish, this mode manufactures The mechanical performance such as bearing ring parts ballistic work and fracture toughness is relatively low, and bearer ring service life is short.Wang Jianli etc. passes through prequenching Mode forms martensite in the material of bearer ring and bainite heterogeneous structure to improve ballistic work and the fracture toughness of bearer ring.
Content of the invention
The technical problem to be solved in the present invention is, provides a kind of method of manufacturing technology of lifting bearer ring performance, permissible Significantly improve ballistic work and the fracture toughness of bearer ring.
The technical solution adopted for the present invention to solve the technical problems is：A kind of manufacture work of construction lifting bearer ring performance Process, comprises the following steps：
S1, bearing ring billet is carried out on cold ring rolling mill roll forming；
S2, the bearer ring of roll forming is heated to 800～900 DEG C of insulations and carries out austenitizing in 10～20 minutes；Then Bearer ring is placed in the prequenching carrying out in 150～250 DEG C of nitric acid salt bath 5～10 minutes to process；
S3, the bearer ring processing prequenching are heated to 200～300 DEG C of insulations and carry out isothermal hardening in 15～25 minutes, make There are Lower Bainite Transformation, then isothermal processes 5～10 minutes in 50～100 DEG C of quenching oil in bearer ring tissue；
S4, by through means of isothermal quenching bearer ring 150～250 DEG C carry out 1～2 hour lonneals process, Then air cooling.
In such scheme, it is achieved that bearer ring crystal grain is comminuted in described step S1, make material internal produce crystal and lack Fall into and increase Recrystallization nucleation position, reduce crystallite dimension.
In such scheme, described crystal defect is dislocation or substructure.
Implement the method for manufacturing technology of the lifting bearer ring performance of the present invention, have the advantages that：
1st, crystal grain is achieved by roll forming bearer ring comminuted, increased the crystal such as material internal dislocation, substructure Defect, provides substantial amounts of nucleation site for improving dynamic recrystallization homogeneous nucleation, provides for forming tiny martensitic structure Premise；
2nd, dynamic recrystallization forming core quick oil quenching fall are realized by being heated to more than austenitizing temperature and carry out heat treatment Low bearer ring temperature carrys out crystal grain thinning；
3rd, processed by prequenching and realize a certain amount of martensite transfor mation in bearer ring tissue, martensite transfor mation and being rolled into The faults in material such as the dislocation that shape causes are catalyzed the transformation of lower bainite；
4th, Lower Bainite Transformation is carried out by means of isothermal quenching bearer ring and obtains martensite/bainite heterogeneous structure, This structural state significantly improves ballistic work and the fracture toughness of bearer ring.
Brief description
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
The structural representation of the bearer ring of Fig. 1 roll forming of the present invention；
Fig. 2 bearer ring roll forming prequenching flow chart；
Fig. 3 does not have roll forming and direct prequenching lower axle carrier ring fracture microscopic appearance figure；
Fig. 4 roll forming prequenching lower axle carrier ring fracture microscopic appearance figure.
Specific embodiment
In order to be more clearly understood to the technical characteristic of the present invention, purpose and effect, now comparison accompanying drawing describes in detail The specific embodiment of the present invention.
Illustrate to improve bearer ring ballistic work and fracture toughness with GCr15 bearing steel bearer ring roll forming prequenching ignition technique As a example.
The first step：On D56G90CNC machine for rolling ring, roll forming obtains the deep groove ball bearing ring of 30～40% deflections, such as Shown in Fig. 1, bearer ring microstructure is refined by roll forming, increase the crystal defects such as material internal dislocation, substructure to show Write and improve Recrystallization nucleation position, be in subsequent heat treatment, to improve dynamic recrystallization nucleation rate and prequenching formation tiny martensite Tissue is ready；
Second step：The bearer ring of roll forming is heated to 800～900 DEG C of insulations and carries out austenitizing within 10～20 minutes, As shown in Fig. 2 now occurrence dynamics recrystallization softening austenite crystal.Subsequently, bearer ring is placed in 150～250 DEG C of nitric acid The prequenching carrying out in salt bath 5～10 minutes processes (as shown in Figure 2), makes to obtain volume fraction 5 in bearer ring by prequenching More than～15% tiny martensite, increases the substructure such as dislocation in geneva body, is that in bearer ring isothermal hardening, lower bainite turns Become and carry out catalysis preparation.
3rd step：The bearer ring that prequenching is processed is heated to 200～300 DEG C of insulations and carries out isothermal hardening in 15～25 minutes (as shown in Figure 2), makes bearer ring organize and Lower Bainite Transformation occurs, then in 50～100 DEG C of quenching oil isothermal processes 5～ 10 minutes.Bearer ring is made to form martensite and Lower Bainite Duplex Structure in organizing by isothermal hardening.
4th step：Bearer ring through means of isothermal quenching is carried out at the lonneal of 1～2 hour at 150～250 DEG C Reason, then air cooling.
5th step：By materialogy analysis and Experiments of Machanics test, directly do not carry out at prequenching through roll forming The bearer ring that reason obtains is through impact fracture experiment microscopic appearance as shown in figure 3, in figure presents the tear of a large amount of intercrystalline crackings Rib；Roll forming prequenching processes the bearer ring impact fracture pattern obtaining as shown in figure 4, in figure presents many plastic deformations Tiny dimple.
Traditional quenching+tempering process, prequenching+isothermal hardening+tempering (come from king and build sharp research conclusion), roll forming The tempering (prequenching+isothermal hardening+tempering, present invention process method) of quenching of+many temperature obtains the ballistic work of bearer ring and fracture toughness As shown in table 1.As known from Table 1, based on above-mentioned steps, being quenched by bearer ring roll forming+many temperature, (prequenching+isothermal is quenched for tempering Fire+tempering) technique can significantly improve ballistic work and the fracture toughness of bearer ring.
Table 1
Above in conjunction with accompanying drawing, embodiments of the invention are described, but the invention is not limited in above-mentioned concrete Embodiment, above-mentioned specific embodiment is only schematically, rather than restricted, those of ordinary skill in the art Under the enlightenment of the present invention, in the case of without departing from present inventive concept and scope of the claimed protection, also can make a lot Form, these belong within the protection of the present invention.

Claims (3)

1. a kind of method of manufacturing technology of lifting bearer ring performance is it is characterised in that comprise the following steps：
S1, bearing ring billet is carried out on cold ring rolling mill roll forming；
S2, the bearer ring of roll forming is heated to 800～900 DEG C of insulations and carries out austenitizing in 10～20 minutes；Then by axle Carrier ring is placed in the prequenching carrying out in 150～250 DEG C of nitric acid salt bath 5～10 minutes and processes；
S3, the bearer ring processing prequenching are heated to 200～300 DEG C of insulations and carry out isothermal hardening in 15～25 minutes, make bearing Bainite transformation is given birth in ring group hair-weaving, then isothermal processes 5～10 minutes in 50～100 DEG C of quenching oil；
S4, by through means of isothermal quenching bearer ring 150～250 DEG C carry out 1～2 hour lonneals process, then Air cooling.
2. the method for manufacturing technology of lifting bearer ring performance according to claim 1 is it is characterised in that in described step S1 In it is achieved that bearer ring crystal grain is comminuted, make material internal produce crystal defect increase Recrystallization nucleation position, reduce crystal grain chi Very little.
3. the method for manufacturing technology of lifting bearer ring performance according to claim 2 is it is characterised in that described crystal defect For dislocation or substructure.
CN201610863629.8A 2016-09-28 2016-09-28 A kind of method of manufacturing technology promoting bearer ring performance Active CN106467931B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107012306A (en) * 2017-04-18 2017-08-04 武汉理工大学 A kind of deformation heat treatment method of precision machine tool bearing matrix
CN108034888A (en) * 2017-12-13 2018-05-15 张旭峰 A kind of overall forging and stamping railway frog steel alloy and its heat treatment process
CN108060291A (en) * 2017-12-21 2018-05-22 武汉理工大学 It improves cold looping mill rolling bearing ring obdurability and improves the manufacturing method of quenching distortion
CN108342565A (en) * 2018-02-28 2018-07-31 武汉理工大学 A kind of secondary quenching heat treatment process improving quenching deformation for bearing ring
CN108411096A (en) * 2018-02-06 2018-08-17 武汉理工大学 Improve the forming manufacturing method of M50 bearing matrix obdurability and dimensional stability
CN110042217A (en) * 2019-04-17 2019-07-23 燕山大学 Nanometer bainite bearing heat treatment method and its bearing obtained
CN111411203A (en) * 2020-04-15 2020-07-14 沈阳工业大学 Method for obtaining 8Cr4Mo4V steel and optimizing quenching process
CN113416832A (en) * 2021-06-11 2021-09-21 武汉理工大学 High-strength-toughness complex-phase heat treatment method for aeroengine bearing

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JP2005113176A (en) * 2003-10-03 2005-04-28 Nsk Ltd Method for producing bearing race
CN101817141A (en) * 2010-04-22 2010-09-01 江苏迪邦三星轴承有限公司 Processing technique for bearing of megawatt wind power speed increasing gear box
CN102108433A (en) * 2011-04-01 2011-06-29 瓦房店轴承集团有限责任公司 Method for quenching bearing steel
CN102312060A (en) * 2011-09-21 2012-01-11 董吉广 Isothermal quenching method of bearing steel G55SiMoV
CN102505067A (en) * 2011-12-29 2012-06-20 瓦房店轴承集团有限责任公司 Bainite quenching method at variable temperatures of high-carbon-chromium bearing steel
CN104561478A (en) * 2014-12-23 2015-04-29 人本集团有限公司 High-carbon chromium bearing steel GCr15 lower bainite heat treatment technique

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JP2005113176A (en) * 2003-10-03 2005-04-28 Nsk Ltd Method for producing bearing race
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CN102108433A (en) * 2011-04-01 2011-06-29 瓦房店轴承集团有限责任公司 Method for quenching bearing steel
CN102312060A (en) * 2011-09-21 2012-01-11 董吉广 Isothermal quenching method of bearing steel G55SiMoV
CN102505067A (en) * 2011-12-29 2012-06-20 瓦房店轴承集团有限责任公司 Bainite quenching method at variable temperatures of high-carbon-chromium bearing steel
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107012306A (en) * 2017-04-18 2017-08-04 武汉理工大学 A kind of deformation heat treatment method of precision machine tool bearing matrix
CN108034888A (en) * 2017-12-13 2018-05-15 张旭峰 A kind of overall forging and stamping railway frog steel alloy and its heat treatment process
CN108060291A (en) * 2017-12-21 2018-05-22 武汉理工大学 It improves cold looping mill rolling bearing ring obdurability and improves the manufacturing method of quenching distortion
CN108411096A (en) * 2018-02-06 2018-08-17 武汉理工大学 Improve the forming manufacturing method of M50 bearing matrix obdurability and dimensional stability
CN108411096B (en) * 2018-02-06 2019-05-24 武汉理工大学 Improve the forming manufacturing method of M50 bearing matrix obdurability and dimensional stability
CN108342565A (en) * 2018-02-28 2018-07-31 武汉理工大学 A kind of secondary quenching heat treatment process improving quenching deformation for bearing ring
CN110042217A (en) * 2019-04-17 2019-07-23 燕山大学 Nanometer bainite bearing heat treatment method and its bearing obtained
CN111411203A (en) * 2020-04-15 2020-07-14 沈阳工业大学 Method for obtaining 8Cr4Mo4V steel and optimizing quenching process
CN113416832A (en) * 2021-06-11 2021-09-21 武汉理工大学 High-strength-toughness complex-phase heat treatment method for aeroengine bearing
CN113416832B (en) * 2021-06-11 2022-07-08 武汉理工大学 High-strength-toughness complex-phase heat treatment method for aeroengine bearing

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