CN108060291A - It improves cold looping mill rolling bearing ring obdurability and improves the manufacturing method of quenching distortion - Google Patents
It improves cold looping mill rolling bearing ring obdurability and improves the manufacturing method of quenching distortion Download PDFInfo
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- CN108060291A CN108060291A CN201711394897.0A CN201711394897A CN108060291A CN 108060291 A CN108060291 A CN 108060291A CN 201711394897 A CN201711394897 A CN 201711394897A CN 108060291 A CN108060291 A CN 108060291A
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- bearing ring
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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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
-
- 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
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
-
- 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
- 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)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Rolling Contact Bearings (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of cold looping mill rolling bearing ring obdurability of raising and improve the manufacturing method of quenching distortion, comprise the following steps：S1, cold rolling loop forming：Roll forming is carried out to bearing ring ring billet using cold rolling ring technique；S2, the bearing ring of roll forming is first slowly heated to certain temperature recrystallizes, and keep the temperature a period of time, to eliminate cold rolling residual stress；Bearing ring is quickly heated up into certain temperature again and carries out austenitizing；Then bearing ring is subjected to prequenching processing and kept the temperature, local low-carbon area is made to form lath martensite；Bearing ring is heated to certain temperature again and is kept the temperature, carries out bainite transformation；Finally bearing ring is cooled to room temperature.The present invention causes ferrite matrix and globular carbide to change using cold rolling plasticity, matches prequenching and bainitic transformation heat treatment process, the microstructure of controlled material, so as to greatly improve the obdurability of bearing ring product qualified rate, material and fatigue life.
Description
Technical field
The invention belongs to machinery manufacturing technology fields, and in particular to a kind of to improve cold looping mill rolling bearing ring obdurability and improve
The manufacturing method of quenching distortion.
Background technology
For bearing as the Grand Equipments key components and parts such as high-speed railway, precision machine tool, wind-driven generator, technical merit is straight
Connect the development level for determining entire equipment manufacture entirety.Bearing includes lasso (comprising inner ring and outer ring), rolling element and guarantor
Three big component of frame is held, wherein, the weight and manufacture cost of lasso account for the 60~70% of entire bearing products, and it is most important to belong to bearing
Building block, service life of bearing depends on the microstructure state of bearing ring.
Using GCr15 bearing steels as the bearing ring of main material, traditional manufacturing process includes turning shaping and martensite
It quenches tempering.Lasso is shaped using the method for turnery processing, chipping allowance is big, and stock utilization is low；On the other hand, conventional martensitic
The heterogeneous structure being made of tempered martensite, retained austenite and carbide is obtained after quenching and tempering treatment, it is this with tempering
Although the microstructure based on martensite can meet the performance requirement of plain bearing, for needing more complicated, high
The precision bearing run under the military services working condition such as speed, prior heat treatment process have been unable to meet its service demand.In addition, bearing
Lasso is shaping and is introducing a large amount of internal stress in heat treatment process, and prior heat treatment method can not effectively eliminate residual stress,
Bearing ring is led to problems such as to be deformed overproof, high rejection rate increases manufacturing cost.
The content of the invention
It is an object of the invention to provide a kind of cold looping mill rolling bearing ring obdurability of raising and improve the manufacture of quenching distortion
Method, it is shaped by precise cold looping mill rolling is combined with prequenching heat treatment method, causes ferrite matrix using cold rolling plasticity
Change with globular carbide, match prequenching and bainitic transformation heat treatment process, the microstructure of controlled material, so as to significantly
Improve bearing ring product qualified rate, the obdurability of material and fatigue life.
The technical solution adopted by the present invention to solve the technical problems is：
It is a kind of to improve cold looping mill rolling bearing ring obdurability and improve the manufacturing method of quenching distortion, comprise the following steps：
S1, cold rolling loop forming：First according to bearing ring size and rolling than design bearing ring ring billet size, then using heat
Forging blank-making technology prepares bearing ring ring billet, then carries out roll forming to bearing ring ring billet using cold rolling ring technique；
S2, prequenching heat treatment：
When S201, the bearing ring of roll forming first being slowly heated to certain temperature recrystallize, and keeping the temperature one section
Between, to eliminate cold rolling residual stress；
S202, bearing ring is quickly heated up into certain temperature progress austenitizing again；
S203 and then bearing ring prequenching processing and keep the temperature, local low-carbon area is made to form lath martensite；
S204, bearing ring is heated to certain temperature again and is kept the temperature, carry out bainite transformation；
S205, finally bearing ring is cooled to room temperature.
By above-mentioned technical proposal, in step S1, cold rolling ratio is 1.15~1.4.
By above-mentioned technical proposal, in step S201, the bearing ring of roll forming is with the heating rate of 100~150 DEG C/h
It is slowly heated to 500~700 DEG C.
By above-mentioned technical proposal, in step S202, bearing ring is quickly heated up to the heating rate of 10~20 DEG C/min
840~860 DEG C.
By above-mentioned technical proposal, in step S203, the prequenching treatment temperature of bearing ring is 160~220 DEG C.
By above-mentioned technical proposal, in step S204, bearing ring is heated to 240~280 DEG C of progress bainite transformations.
By above-mentioned technical proposal, in step S205, last bearing ring oil cooling to room temperature.
The beneficial effect comprise that：The present invention first passes through bearing matrix deformation state control cold roll forming, a side
Face, basis material experience cold rolling plastic deformation generate dislocation and cause globular carbide local deformation, are austenitization stage
Forming core provides condition, achievees the purpose that refine original austenite grain and promotes globular carbide dissolving, and then causes the reduction of Ms
(30-50 DEG C can be reduced, in case subsequently obtaining lath martensite), meanwhile, in conjunction with recrystallization annealing process, eliminate cold-rolling deformation
Residual stress reduces the deformation of bearing ring heat-treatment quenching；On the other hand, using in the austenitization of globular carbide
Accelerate dissolving, make basis material local part uneven, by prequenching heat treatment process, local low-carbon area is made to form toughness more
High lath martensite finally with reference to bainitic transformation, forms martensite-bainite microstructure in microstructure.
The present invention shapes Proper Match prequenching heat treatment process by the cold looping mill rolling of bearing matrix, to control globular carbide
Quantity, martensite and bainite volume fraction simultaneously control residual stress state, improve bearing ring obdurability and improve quenching change
Shape；Using prequenching and bainitic transformation heat treatment process, favourable tissue change that cold looping mill rolling forming belt comes and again is made full use of
Recrystallization annealing temperature processing, reduces quenching deformation for bearing ring and the Microstructure Performance of controlled material, is closed so as to greatly improve finished product
The fatigue life of lattice rate, the obdurability of material and bearing ring.In addition, the present invention is based on conventional bearing matrix manufacturing process,
Easy to implement, time and energy consumption are small, are easy to reduce quenching deformation for bearing ring, rate of reducing the number of rejects and seconds.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the invention will be further described, in attached drawing：
Fig. 1 is the process flow chart that the present invention is implemented.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
As shown in Figure 1, a kind of improve cold looping mill rolling bearing ring obdurability and improve the manufacturing method of quenching distortion, including with
Lower step：
S1, cold rolling loop forming：First according to bearing ring size and rolling than design bearing ring ring billet size, then using heat
Forging blank-making technology prepares bearing ring ring billet, then carries out roll forming to bearing ring ring billet using cold rolling ring technique；
S2, prequenching heat treatment：
When S201, the bearing ring of roll forming first being slowly heated to certain temperature recrystallize, and keeping the temperature one section
Between, to eliminate the residual stress of cold-rolled process introducing；
S202, bearing ring is quickly heated up into certain temperature progress austenitizing again；
S203 and then bearing ring prequenching processing and keep the temperature, local low-carbon area is made to form lath martensite；
S204, bearing ring is heated to certain temperature again and is kept the temperature, carry out bainite transformation；
S205, finally bearing ring is cooled to room temperature.
In a preferred embodiment of the invention, in step S1, cold rolling ratio is 1.15~1.4.Internal diameter rolls as follows than setting：With
On the basis of the internal diameter of lasso, product internal diameter size d1To determine blank internal diameter size d0, then cold rolling compares k=d1/d0.It is cut with rectangle
Face ring product is object, since the axial deformation of ring rolling process can be ignored, designs the height H of blank0With forging
Height H it is equal, i.e. H0=H；According to equivalent cold rolling ratio and product internal diameter size d1To determine blank internal diameter size d0=d1/k；
It is assumed that product outer diameter is V, according to constancy of volume principle, the outer diameter of blank is：
In a preferred embodiment of the invention, in step S201, the bearing ring of roll forming is with 100~150 DEG C/h's
Heating rate is slowly heated to 500~700 DEG C, keeps the temperature 30 minutes, eliminates residual stress.
In a preferred embodiment of the invention, in step S202, bearing ring is fast with the heating rate of 10~20 DEG C/min
Speed is heated to 840~860 DEG C, keeps the temperature 30 minutes.
In a preferred embodiment of the invention, in step S203, the prequenching treatment temperature of bearing ring is 160~220
DEG C, keep the temperature 10 minutes.
In a preferred embodiment of the invention, in step S204, bearing ring is heated to 240~280 DEG C of progress bainites
Transformation, heat preservation are air-cooled to room temperature after 30 minutes.
In a preferred embodiment of the invention, in step S205, last bearing ring oil cooling to room temperature.
By taking GCr15 bearing steel bars as an example, the present invention comprises the following steps：
S1, GCr15 bearing steels bar is carried out to the forging of high speed pier with after spheroidizing, hot place is obtained than 1.3 cold rollings according to rolling
Bearing ring before reason；
S2, lasso is slowly heated to 550 DEG C with the heating rate of 100~150 DEG C/h, and keeps the temperature 30 minutes；
3) using prequenching and bainitic transformation technique, cold rolling bearing ring is heated to 850 DEG C first, keeps the temperature 20 points
Clock then carries out martensite prequenching at 210 DEG C, keeps the temperature 10 minutes, generating portion martensite；Then 30min is kept the temperature at 260 DEG C
Bainite transformation is carried out, after being cooled to room temperature, martensite-bainite dual phase structure is formed in final bearing ring.
It quenches the bearing ring by above-mentioned cold looping mill rolling shaping-prequenching heat treatment method and the acquisition of prior heat treatment method
The results are shown in Table 1 for fiery deformation comparison.
Circularity and depth of parallelism comparison under 1 different heat treatment technique of table
| Heat treatment process | Roundness of external circle/silk | The depth of parallelism/silk |
| Prior heat treatment | 30~40 | 5~6 |
| The application | 5~16 | 1~3 |
Hardness and toughness comparative result are as shown in table 2.
Hardness and Toughness comparison under 2 different heat treatment technique of table
It was found from upper table comparison：The present invention significantly carries under the premise of ensureing that hardness and prior heat treatment process are comparable
Bearing ring parts quenching distortion, impact flexibility and fracture toughness have been risen, fatigue life of the bearing under service condition is made significantly to carry
Height, so as to illustrate that this method makes bearing ring parts obtain more excellent combination of strength and toughness, the rate that can not only reduce the number of rejects and seconds and
It disclosure satisfy that the more harsh service demand of bearing.
The present invention can efficiently use the high density position that ferrite matrix introduces in the cold looping mill rolling forming process of GCr15 bearing steels
Mistake is eliminated residual stress and refinement original austenite grain by recrystallization annealing, is shaped using cold looping mill rolling and promote globular carbide
Dissolving causes the reduction of Ms temperature, matches prequenching heat treatment and bainitic transformation technique, improve quenching deformation for bearing ring and
The Microstructure Performance of controlled material, so as to greatly improve the tired longevity of the obdurability of product qualified rate, material and bearing ring
Life.
It should be appreciated that for those of ordinary skills, can be improved or converted 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 improve cold looping mill rolling bearing ring obdurability and improve the manufacturing method of quenching distortion, which is characterized in that including with
Lower step：
S1, cold rolling loop forming：First according to bearing ring size and rolling than design bearing ring ring billet size, then using hot forging system
Base technique prepares bearing ring ring billet, then carries out roll forming to bearing ring ring billet using cold rolling ring technique；
S2, prequenching heat treatment：
S201, the bearing ring of roll forming is first slowly heated to certain temperature recrystallizes, and keep the temperature a period of time, with
Eliminate cold rolling residual stress；
S202, bearing ring is quickly heated up into certain temperature progress austenitizing again；
S203 and then bearing ring prequenching processing and keep the temperature, local low-carbon area is made to form lath martensite；
S204, bearing ring is heated to certain temperature again and is kept the temperature, carry out bainite transformation；
S205, finally bearing ring is cooled to room temperature.
2. according to claim 1 improve cold looping mill rolling bearing ring obdurability and improve the manufacturing method of quenching distortion,
It is characterized in that, in step S1, cold rolling ratio is 1.15~1.4.
3. according to claim 1 improve cold looping mill rolling bearing ring obdurability and improve the manufacturing method of quenching distortion,
It being characterized in that, in step S201, the bearing ring of roll forming is slowly heated to 500 with the heating rate of 100~150 DEG C/h~
700℃。
4. according to claim 1 improve cold looping mill rolling bearing ring obdurability and improve the manufacturing method of quenching distortion,
It is characterized in that, in step S202, bearing ring quickly heats up to 840~860 DEG C with the heating rate of 10~20 DEG C/min.
5. according to claim 1 improve cold looping mill rolling bearing ring obdurability and improve the manufacturing method of quenching distortion,
It is characterized in that, in step S203, the prequenching treatment temperature of bearing ring is 160~220 DEG C.
6. according to claim 1 improve cold looping mill rolling bearing ring obdurability and improve the manufacturing method of quenching distortion,
It is characterized in that, in step S204, bearing ring is heated to 240~280 DEG C of progress bainite transformations.
7. according to claim 1 improve cold looping mill rolling bearing ring obdurability and improve the manufacturing method of quenching distortion,
It is characterized in that, in step S205, last bearing ring oil cooling to room temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711394897.0A CN108060291A (en) | 2017-12-21 | 2017-12-21 | It improves cold looping mill rolling bearing ring obdurability and improves the manufacturing method of quenching distortion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711394897.0A CN108060291A (en) | 2017-12-21 | 2017-12-21 | It improves cold looping mill rolling bearing ring obdurability and improves the manufacturing method of quenching distortion |
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| CN108060291A true CN108060291A (en) | 2018-05-22 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950175A (en) * | 2018-08-15 | 2018-12-07 | 武汉理工大学 | A kind of pulsed current annealing method of cold rolling bearing ring microdefect reparation |
| CN109797274A (en) * | 2019-01-31 | 2019-05-24 | 武汉理工大学 | A kind of compound deformation spheronization process of high-carbon chromium steel bearing ring Wen-heat |
| CN110331272A (en) * | 2019-07-31 | 2019-10-15 | 武汉理工大学 | A kind of deformation and fades change coordinated regulation method of the high tough tissue of bearing assembly |
| CN110484694A (en) * | 2019-07-31 | 2019-11-22 | 武汉理工大学 | A kind of deformation and fades change coordinated regulation method of bearing matrix fine grained texture |
| CN110484707A (en) * | 2019-07-31 | 2019-11-22 | 武汉理工大学 | A kind of deformation and fades change collaboration thinning method of bearing collar path crystal grain |
| CN110628998A (en) * | 2019-07-31 | 2019-12-31 | 武汉理工大学 | Precise bearing assembly structure stabilization deformation phase change cooperative regulation and control method |
| CN111961811A (en) * | 2020-09-04 | 2020-11-20 | 燕山大学 | Method for preparing impact-resistant steel part by using phase change speed difference |
| CN112853079A (en) * | 2020-12-31 | 2021-05-28 | 无锡派克新材料科技股份有限公司 | Large-diameter thin-wall high-cylinder ultrahigh-strength steel D406A ring forging forming method |
| CN113061710A (en) * | 2021-02-25 | 2021-07-02 | 克莱斯克斯轴承(北京)有限公司 | Bearing anti-seismic heat treatment process |
| CN114606374A (en) * | 2022-03-10 | 2022-06-10 | 西北工业大学 | Method for refining carbide of inner C-shaped high-temperature bearing ring |
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| CN106467931A (en) * | 2016-09-28 | 2017-03-01 | 武汉理工大学 | A kind of method of manufacturing technology of lifting bearer ring performance |
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| CN107201524A (en) * | 2017-05-22 | 2017-09-26 | 中信戴卡股份有限公司 | The reinforcing of spinning roller surface laser shapes method |
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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 |
| CN104087862A (en) * | 2014-07-10 | 2014-10-08 | 太原重工股份有限公司 | Alloy composition, semi-autogenous mill lining plate and manufacturing method of lining plate |
| CN106467931A (en) * | 2016-09-28 | 2017-03-01 | 武汉理工大学 | A kind of method of manufacturing technology of lifting bearer ring performance |
| 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 |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950175B (en) * | 2018-08-15 | 2020-01-31 | 武汉理工大学 | pulse current processing method for repairing micro defects of cold-rolled bearing ring |
| CN108950175A (en) * | 2018-08-15 | 2018-12-07 | 武汉理工大学 | A kind of pulsed current annealing method of cold rolling bearing ring microdefect reparation |
| CN109797274A (en) * | 2019-01-31 | 2019-05-24 | 武汉理工大学 | A kind of compound deformation spheronization process of high-carbon chromium steel bearing ring Wen-heat |
| CN109797274B (en) * | 2019-01-31 | 2020-08-04 | 武汉理工大学 | Temperature-thermal composite deformation spheroidizing method for high-carbon chromium steel bearing ring |
| CN110628998B (en) * | 2019-07-31 | 2020-09-01 | 武汉理工大学 | Precise bearing assembly structure stabilization deformation phase change cooperative regulation and control method |
| CN110628998A (en) * | 2019-07-31 | 2019-12-31 | 武汉理工大学 | Precise bearing assembly structure stabilization deformation phase change cooperative regulation and control method |
| CN110484707A (en) * | 2019-07-31 | 2019-11-22 | 武汉理工大学 | A kind of deformation and fades change collaboration thinning method of bearing collar path crystal grain |
| CN110484694A (en) * | 2019-07-31 | 2019-11-22 | 武汉理工大学 | A kind of deformation and fades change coordinated regulation method of bearing matrix fine grained texture |
| CN110331272A (en) * | 2019-07-31 | 2019-10-15 | 武汉理工大学 | A kind of deformation and fades change coordinated regulation method of the high tough tissue of bearing assembly |
| CN111961811A (en) * | 2020-09-04 | 2020-11-20 | 燕山大学 | Method for preparing impact-resistant steel part by using phase change speed difference |
| CN111961811B (en) * | 2020-09-04 | 2022-05-24 | 燕山大学 | Method for preparing impact-resistant steel part by using phase change speed difference |
| CN112853079A (en) * | 2020-12-31 | 2021-05-28 | 无锡派克新材料科技股份有限公司 | Large-diameter thin-wall high-cylinder ultrahigh-strength steel D406A ring forging forming method |
| CN112853079B (en) * | 2020-12-31 | 2024-02-13 | 无锡派克新材料科技股份有限公司 | Forming method of large-diameter thin-wall high-cylinder type ultra-high strength steel D406A ring forging |
| CN113061710A (en) * | 2021-02-25 | 2021-07-02 | 克莱斯克斯轴承(北京)有限公司 | Bearing anti-seismic heat treatment process |
| CN114606374A (en) * | 2022-03-10 | 2022-06-10 | 西北工业大学 | Method for refining carbide of inner C-shaped high-temperature bearing ring |
| CN114606374B (en) * | 2022-03-10 | 2023-01-24 | 西北工业大学 | Method for refining carbide of inner C-shaped high-temperature bearing ring |
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Application publication date: 20180522 |