CN102534133A - Heat treatment process for bearing steel - Google Patents
Heat treatment process for bearing steel Download PDFInfo
- Publication number
- CN102534133A CN102534133A CN2010105900709A CN201010590070A CN102534133A CN 102534133 A CN102534133 A CN 102534133A CN 2010105900709 A CN2010105900709 A CN 2010105900709A CN 201010590070 A CN201010590070 A CN 201010590070A CN 102534133 A CN102534133 A CN 102534133A
- Authority
- CN
- China
- Prior art keywords
- steel
- bearing steel
- isothermal
- treatment process
- heat treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention provides a heat treatment process for a bearing steel. According to the process, the technology measure of combination of quenching temperature increasing and an isothermal treatment is adopted to change the internal organizational structure of the steel so as to comprehensively improve the comprehensive properties of the chromium-containing bearing steel. The experiment results show that: the completely-austenitized chromium-containing bearing steel is subjected to isothermal quenching and tempering pretreatment, the treated carbide has characteristics of fine and uniform property, and dispersed distribution; with the refined austenite grains, the wear resistance of the steel is increased by more than 30%; the cold processing plasticity of the steel is improved, and the cutting property and the welding performance of the steel are substantially improved.
Description
Technical field
The invention belongs to metallic substance heat treatment technics field, particularly a kind of thermal treatment process about the GCr15 bearing steel.
Background technology
In bearing manufacturing field, GCr15 Steel Alloy content is less, has good performance and high hardening capacity, can obtain height after the thermal treatment and uniform hardness, is most widely used a kind of high chromium bearing steel.Commonly used to make ball, bearing ring etc.As make wall thickness 12mm, the bearing housing of the H level of external diameter＜250mm to C level; The steel ball of diameter 25.4-50.8mm; The roller of diameter＜22mm etc.; Also can be used as in addition and bear big load, require other mechanical component and various precision measuringtoll cold-punching moulds of high-wearing feature, high elastic limit, high contact fatigue strength etc.Like the ball screw of lathe, the spout of turbo-jet engine nozzle, plunger, valve, lining etc.
The conventional heat treatment process parameter of GCr15 steel is:
1. common annealing: 790-810 ℃ heating, after stove is chilled to 650 ℃, air cooling-HB170-207
2. isothermal annealing: 790-810 ℃ heating, 710-720 ℃ of isothermal, air cooling-HB207-229
3. normalizing: 900-920 ℃ heating, air cooling-HB270-390
4. high tempering: 650-700 ℃ heating, air cooling-HB229-285
5. quench: 860 ℃ of heating, oil quenching-HRC62-66
6. low-temperaturetempering: 150-170 ℃ tempering, air cooling-HRC61-66
7. carbonitriding: 820-830 ℃ oozed 1.5-3 hour altogether, oil quenching ,-60 ℃ to-70 ℃ sub-zero treatment+150 ℃ extremely+160 ℃ of tempering, air cooling-HRC ≈ 67.
After this steel adopts above-mentioned quenching technology to handle; Though have higher hardness, good wear resistance and anti-fatigue performance, the weak point that exists is that cold working plasticity is general, and cutting ability and welding property are relatively poor; Particularly bigger to forming susceptibility of flake formation, and temper brittleness is arranged.
Summary of the invention
The objective of the invention is the deficiency to above-mentioned prior art, the heat treating regime of GCr15 bearing steel is improved, thereby a kind of thermal treatment process of bearing steel is provided.The present invention changes the internal organizational structure of steel through taking to improve the technical measures that quenching temperature combines with isothermal processes, reaches the purpose of comprehensively putting forward high-chromium bearing steel over-all properties.
The present invention is achieved in that
GCr15 bearing steel austenite quenching temperature is 870 ℃, isothermal in the salt bath, air cooling then.
Said isothermal temperature is 160-240 ℃;
Said isothermal time is 20-60min.
The present invention compares with existing heat treatment technics, has following advantage:
The carbide refinement best results of GCr15 bearing steel isothermal quenching and tempering thermal pretreatment after complete austenitizing, carbide after treatment is tiny, even, the distribution disperse, refinement simultaneously austenite crystal, make the wear resistance of steel improve more than 30%.Eliminate the temper brittleness of steel simultaneously, cold working plasticity improves, and cutting ability and welding property also increase.
Embodiment
Below in conjunction with embodiment the present invention is described in detail:
According to technical scheme provided by the invention the GCr15 bearing steel is heat-treated, the chemical ingredients of sample (weight percent) is: C 0.90, and Mn 0.30, and Si 0.25, and S 0.020, and P 0.025, and Cr 1.50.
Quench air cooling behind the isothermal 20min in 160 ℃ of salt baths after sample is heated to 870 ℃ of austenitizings.Austenite produces thermostabilization, and after the final tempering, remained austenite content increases to 13.2%; Isothermal time extends to 60min, and residual austenite content no longer increases.Carry out deepfreeze behind the marquench immediately, can effectively eliminate residual austenite, make it to drop to below 5%.Behind the sample martensite isothermal 60min, the small portion of residual austenitic transformation is an isothermal martensite, makes wear resistance improve more than 30%.
Experiment showed, after the GCr15 bearing steel is heated to 870 ℃ of complete austenitizings and quench that the salt bath isothermal temperature is 240-160 ℃, through 20-60min different time isothermal.During isothermal 20min, austenite produces thermostabilization, and after the final tempering, remained austenite content increases to some extent; Treat that isothermal time extends to 60min, residual austenite content no longer increases.Carry out deepfreeze behind the marquench immediately, can effectively eliminate residual austenite.What obtain behind sample oil cooling or the air cooling is organized as needle type martensite+lower bainite+residual austenite+remaining carbide.At the isothermal initial stage, bainite transformation is very fast, and lower bainite is grown up with isothermal time, and isothermal is behind certain hour, and the lower bainite velocity of transformation descends, and bainite no longer continues to grow up, and the bainite transformation amount is when 45.0% left and right sides, and the over-all properties of bearing steel is best.The GCr15 bearing steel is after the temper of quenching, and sample fracture mechanism is the fracture of micropore accumulation type, and after austempering was handled, fracture mechanism changed cleavage fracture into.
Claims (3)
1. the thermal treatment process of a bearing steel is characterized in that, the austenite quenching temperature of steel is 870 ℃, isothermal in the salt bath, air cooling then.
2. according to the thermal treatment process of the said a kind of bearing steel of claim 1, it is characterized in that salt temperature is 160-240 ℃.
3. according to the thermal treatment process of the said a kind of bearing steel of claim 1, it is characterized in that isothermal time is 20-60min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105900709A CN102534133A (en) | 2010-12-16 | 2010-12-16 | Heat treatment process for bearing steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105900709A CN102534133A (en) | 2010-12-16 | 2010-12-16 | Heat treatment process for bearing steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102534133A true CN102534133A (en) | 2012-07-04 |
Family
ID=46342154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105900709A Pending CN102534133A (en) | 2010-12-16 | 2010-12-16 | Heat treatment process for bearing steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102534133A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758073A (en) * | 2012-07-18 | 2012-10-31 | 浙江天马轴承股份有限公司 | Heat treatment method of bearing |
| CN103173690A (en) * | 2013-04-16 | 2013-06-26 | 牛加伟 | Wear-resistant bearing steel and heat treatment method thereof |
| CN104117828A (en) * | 2014-07-24 | 2014-10-29 | 成都亨通兆业精密机械有限公司 | Machining technology for GCr15 ring gauge |
| CN106222375A (en) * | 2016-08-31 | 2016-12-14 | 人本集团有限公司 | A kind of Technology for Heating Processing of bearing ring |
| CN107674944A (en) * | 2017-11-19 | 2018-02-09 | 深圳万佳互动科技有限公司 | A kind of hardening and tempering method of splined shaft |
| CN107893556A (en) * | 2017-12-19 | 2018-04-10 | 山东九路泊车设备股份有限公司 | A kind of combined type vertical circulation multi-storied garage chain commutation guide rail and preparation method thereof |
| CN108165722A (en) * | 2017-12-29 | 2018-06-15 | 人本集团有限公司 | GCr15 bearing ring heat treatment process |
| CN112609063A (en) * | 2020-12-07 | 2021-04-06 | 江苏力星通用钢球股份有限公司 | Heat treatment processing technology for high-precision long-life noiseless bearing rolling body |
| CN112941274A (en) * | 2021-01-28 | 2021-06-11 | 西京学院 | Method for improving high-carbon chromium steel strength and toughness and application thereof |
| CN113337694A (en) * | 2021-06-30 | 2021-09-03 | 临清市同兴轴承锻造有限公司 | Spheroidizing annealing heat treatment method for ultrahigh-carbon bearing steel |
| 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 |
-
2010
- 2010-12-16 CN CN2010105900709A patent/CN102534133A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758073B (en) * | 2012-07-18 | 2014-06-25 | 天马轴承集团股份有限公司 | Heat treatment method of bearing |
| CN102758073A (en) * | 2012-07-18 | 2012-10-31 | 浙江天马轴承股份有限公司 | Heat treatment method of bearing |
| CN103173690A (en) * | 2013-04-16 | 2013-06-26 | 牛加伟 | Wear-resistant bearing steel and heat treatment method thereof |
| CN104117828A (en) * | 2014-07-24 | 2014-10-29 | 成都亨通兆业精密机械有限公司 | Machining technology for GCr15 ring gauge |
| CN106222375A (en) * | 2016-08-31 | 2016-12-14 | 人本集团有限公司 | A kind of Technology for Heating Processing of bearing ring |
| CN107674944B (en) * | 2017-11-19 | 2019-01-11 | 连云港江南精工机械有限公司 | A kind of hardening and tempering method of splined shaft |
| CN107674944A (en) * | 2017-11-19 | 2018-02-09 | 深圳万佳互动科技有限公司 | A kind of hardening and tempering method of splined shaft |
| CN107893556A (en) * | 2017-12-19 | 2018-04-10 | 山东九路泊车设备股份有限公司 | A kind of combined type vertical circulation multi-storied garage chain commutation guide rail and preparation method thereof |
| CN108165722A (en) * | 2017-12-29 | 2018-06-15 | 人本集团有限公司 | GCr15 bearing ring heat treatment process |
| CN112609063A (en) * | 2020-12-07 | 2021-04-06 | 江苏力星通用钢球股份有限公司 | Heat treatment processing technology for high-precision long-life noiseless bearing rolling body |
| CN112941274A (en) * | 2021-01-28 | 2021-06-11 | 西京学院 | Method for improving high-carbon chromium steel strength and toughness and application thereof |
| CN112941274B (en) * | 2021-01-28 | 2023-02-28 | 西京学院 | Method for improving high-carbon chromium steel strength and toughness and application thereof |
| 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 |
| CN113337694A (en) * | 2021-06-30 | 2021-09-03 | 临清市同兴轴承锻造有限公司 | Spheroidizing annealing heat treatment method for ultrahigh-carbon bearing steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102534133A (en) | Heat treatment process for bearing steel | |
| CN102534134B (en) | Bainite isothermal quenching thermal treatment process method for medium-carbon bearing steel | |
| CN102758140B (en) | High-carbon microalloying steel ball and production process thereof | |
| CN105039901B (en) | A kind of carbo-nitriding bearing parts and preparation method and the ball bearing with the part | |
| CN103602797A (en) | High-hardness steel cut wire shot heat treatment technology | |
| WO2018107316A1 (en) | Heat treatment method for ultra-high-carbon bearing steel | |
| CN113862561A (en) | Long-life high-carbon bearing steel pipe and preparation method and application thereof | |
| CN106555131B (en) | A kind of Super High Carbon profile shaft holds Heat-Treatment of Steel method | |
| CN104164548B (en) | A kind of thermal treatment process of thick and large section low-carbon low-alloy steel forge piece | |
| CN106011739B (en) | Tappet for internal combustion engine and its manufacturing method with high-wearing feature | |
| CN105714190B (en) | A kind of impact resistance load bearings steel and its heat treatment method | |
| CN102899469B (en) | Heat-treatment method of high-chromium wear-resistant white cast iron Cr28 | |
| CN104451705A (en) | Gear manufacturing process | |
| CN106555132B (en) | A kind of high-carbon-chromium bearing steel Technology for Heating Processing | |
| CN110066909A (en) | A kind of heat treatment process improving GCr15SiMn steel end hardenability hardness | |
| CN109055707A (en) | The heat treatment process of high-carbon-chromium bearing steel part | |
| CN106868258A (en) | A kind of high-carbon chromium steel carbide superfining handling process | |
| CN107904387B (en) | A kind of Gear Shaft Heat Treatment | |
| EP3155134A1 (en) | Method of heat treatment of bearing steel | |
| CN105986088A (en) | Heat treatment process for 1Cr17Ni2 steel | |
| CN108424999B (en) | A kind of heat treatment process of shallow-tank separator driving chain components | |
| CN105525063A (en) | Tempering technology for improving mechanical property of 35 NCD16 steel | |
| KR102074428B1 (en) | Method for Heat Treatment of Cast Iron Cam Shaft mounting in Combustion Engine | |
| CN108203759B (en) | A kind of conditioning treatment method of heavy-duty gear | |
| CN101580893A (en) | Method for high-temperature fast quenching of seamless steel pipes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |