CN101724786A - Bearing steel and technology for heating processing - Google Patents
Bearing steel and technology for heating processing Download PDFInfo
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- CN101724786A CN101724786A CN200810230524A CN200810230524A CN101724786A CN 101724786 A CN101724786 A CN 101724786A CN 200810230524 A CN200810230524 A CN 200810230524A CN 200810230524 A CN200810230524 A CN 200810230524A CN 101724786 A CN101724786 A CN 101724786A
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Abstract
The invention discloses a novel bearing steel and a technology for heating processing, wherein the bearing steel comprises chemical composition (by weight percent): 0.70-0.80% of C, 0.55-0.65% of Si, 1.00-1.10% of Mn, 0.50-0.65% of Cr, not more than 0.10% of Mo, not more than 0.025% of P, not more than 0.025% of S, not more than 0.30% of Ni, not more than 0.25% of Cu, not more than 0.50% of Ni+Cu as well as balance Fe and unavoidable impurities. The technology for heating processing of the bearing steel comprises steel heating processing technique and semi-finished product heating processing technique after mechanical processing of workpieces. The invention can improve the processing accuracy of steel, impact toughness and fatigue life.
Description
Technical field
The invention belongs to the technical field of Metallic Materials and Heat Treatment, especially a kind of novel bearing steel and thermal treatment process.
Background technology
High-carbon-chromium bearing steel GCr15 (1.0-C, 1.5-Cr), be that various countries use maximum bearing steel kinds over more than 100 year, major cause is that it has characteristics such as rolling contact fatigue excellent property, hardness height and wear resistance are good, but there is a certain amount of thick eutectic carbides in the crystal structure of GCr15 steel, often cause its rolling fatigue life and obdurability significantly to reduce, handle, carry out hot-work again after making the eutectic carbides solid solution so need to carry out long-time high temperature diffusion annealing to this steel.The continuous casting GCr15 bearing steel of China's production at present is owing to be subjected to the restriction of production unit, the high temperature diffusion annealing time is not enough far away, so the banded carbide of bearing steel is reaching the standard grade at the GB/T18254 standard-required all often, even severe overweight, seriously restricting work-ing life and the reliability of using this steel manufacturing bearing.
Summary of the invention
The purpose of this invention is to provide a kind of novel bearing steel and thermal treatment process, can improve working accuracy, impelling strength and the fatigue lifetime of steel.
Technical scheme of the present invention is:
Described a kind of novel bearing steel, this bearing steel chemical constitution is (weight percentage): C:0.70～0.80%, Si:0.55～0.65%, Mn:1.00～1.10%, Cr:0.50～0.65%, Mo ≯ 0.10%, P ≯ 0.025%, S ≯ 0.025%, Ni ≯ 0.30%, Cu ≯ 0.25%, Ni+Cu ≯ 0.50%, all the other are Fe and unavoidable impurities.
Described a kind of novel bearing Heat Treatment Of Steel technology is as follows:
1) steel heat treatment process:
Normalizing treatment: steel are heated to temperature when being 870～880 ℃ in stove, insulation 1h, the steel fan cooling in air of coming out of the stove;
Anneal: steel are heated in stove and are incubated 1h when temperature is 700～710 ℃, reheat is incubated 3h when temperature is 760～770 ℃, and then cool to the temperature time insulation 4h that is 680～690 ℃, and when being cooled to 550～600 ℃ with the speed of 30 ℃/h at last, furnace cooling;
2) work in-process thermal treatment process after the workpiece mechanical workout:
Quench treatment: workpiece is heated to temperature when being 790～800 ℃ in stove, and insulation 45～60min, workpiece come out of the stove the back at oil quenching;
Temper: workpiece is heated to temperature when being 150～160 ℃ in stove, insulation 4h.
Advantage of the present invention:
1, approaching with the carbide particle size of GCr15 bearing steel, but carbide strip obviously improves.
2, hardening capacity is better than the GCr15 bearing steel, and the effective thickness of GCr15 bearing steel through hardening is 12mm, and this novel bearing steel can reach 15mm, and its major cause is to have increased due to the alloying element contents such as Si, Mn.
3, carbon content is lower than the GCr15 bearing steel, and after the tempering of quenching, metallographic structure middle plate strip martensite quantity is more, and good toughness is so impelling strength is greatly improved.The average impact value of GCr15 bearing steel is 42J/Cm
2, the average impact value of this novel bearing steel is 56J/Cm
2, to compare with the GCr15 bearing steel, impelling strength improves more than 33%.
4, contact fatigue life is a little more than the GCr15 bearing steel, the rated life time L of GCr15 bearing steel and this novel bearing steel
10Be respectively 0.4595 * 10
7With 0.4888 * 10
7, median life L
50Be respectively 1.2363 * 10
7With 1.4950 * 10
7, compare L with the GCr15 bearing steel
10Improve 6%, L
50Improve 21%.
5, reduce the content of chromium, reduce production costs.
Bearing steel of the present invention be solve the high-carbon-chromium bearing steel distribution of carbides inhomogeneous, save chromium resource and take to reduce the content of carbon and chromium and the remodeling bearing steel developed, and the supporting with it thermal treatment process of research.Bearing steel carbon content of the present invention is reduced to 0.70～0.80%, chromium content is reduced to 0.50～0.65%, carbide segregation is reduced, improve the serious banded carbide that occurs in the production of China GCr15 bearing steel greatly, reduce production costs, make steel obtain tiny and uniform Spheroidizing Annealing tissue, thereby improve the working accuracy and the work-ing life of bearing.
Embodiment
The present invention is further described by the following embodiment.
Embodiment 1
1, bearing steel chemical constitution of the present invention is (weight percentage): C:0.70%, Si:0.55%, Mn:1.00%, Cr:0.50%, Mo:0.01%, P:0.008%, S:0.004%, Ni:0.01%, Cu:0.02%, Ni+Cu:0.03%, all the other are Fe and unavoidable impurities.
2, steel (before the workpiece mechanical workout) thermal treatment process:
Normalizing treatment: steel are heated to temperature when being 870 ℃ in stove, insulation 1h, the steel fan cooling in air of coming out of the stove.
Anneal: steel are heated to the temperature time insulation 1h that is 700 ℃ in stove, and reheat is insulation 3h when temperature is 760 ℃, and then cool to and be incubated 4h when temperature is 680 ℃, when being cooled to 550 ℃ with the speed of 30 ℃/h at last, and furnace cooling.
3, work in-process thermal treatment process after the workpiece mechanical workout:
Quench treatment: workpiece is heated to temperature when being 790 ℃ in stove, and insulation 45～50min, workpiece come out of the stove the back at oil quenching.
Temper: workpiece is heated to temperature when being 150 ℃ in stove, insulation 4h.
Embodiment 2
1, the chemical constitution of another embodiment of bearing steel of the present invention is (weight percentage): C:0.75%, Si:0.60%, Mn:1.05%, Cr:0.60%, Mo:0.01%, P:0.012%, S:0.005%, Ni:0.06%, Cu:0.01%, Ni+Cu:0.07%, all the other are Fe and unavoidable impurities.
2, steel (before the workpiece mechanical workout) thermal treatment process:
Normalizing treatment: steel are heated to temperature when being 875 ℃ in stove, insulation 1h, the steel fan cooling in air of coming out of the stove.
Anneal: steel are heated to the temperature time insulation 1h that is 705 ℃ in stove, and reheat is insulation 3h when temperature is 765 ℃, and then cool to and be incubated 4h when temperature is 685 ℃, when being cooled to 580 ℃ with the speed of 30 ℃/h at last, and furnace cooling.
3, work in-process thermal treatment process after the workpiece mechanical workout:
Quench treatment: workpiece is heated to temperature when being 795 ℃ in stove, and insulation 05～55min, workpiece come out of the stove the back at oil quenching.
Temper: workpiece is heated to temperature when being 155 ℃ in stove, insulation 4h.
Embodiment 3
1, the chemical constitution of another embodiment of bearing steel of the present invention is (weight percentage): C:0.80%, Si:0.65%, Mn:1.10%, Cr:0.65%, Mo:0.01%, P:0.020%, S:0.015%, Ni:0.08%, Cu:0.01%, Ni+Cu:0.09%, all the other are Fe and unavoidable impurities.
2, steel (before the workpiece mechanical workout) thermal treatment process:
Normalizing treatment: steel are heated to temperature when being 880 ℃ in stove, insulation 1h, the steel fan cooling in air of coming out of the stove.
Anneal: steel are heated to the temperature time insulation 1h that is 710 ℃ in stove, and reheat is insulation 3h when temperature is 770 ℃, and then cool to and be incubated 4h when temperature is 690 ℃, when being cooled to 600 ℃ with the speed of 30 ℃/h at last, and furnace cooling.
3, work in-process thermal treatment process after the workpiece mechanical workout:
Quench treatment: workpiece is heated to temperature when being 800 ℃ in stove, and insulation 55～60min, workpiece come out of the stove the back at oil quenching.
Temper: workpiece is heated to temperature when being 160 ℃ in stove, insulation 4h.
Claims (2)
1. novel bearing steel, it is characterized in that: this bearing steel chemical constitution is (weight percentage): C:0.70～0.80%, Si:0.55～0.65%, Mn:1.00～1.10%, Cr:0.50～0.65%, Mo ≯ 0.10%, P ≯ 0.025%, S ≯ 0.025%, Ni ≯ 0.30%, Cu ≯ 0.25%, Ni+Cu ≯ 0.50%, all the other are Fe and unavoidable impurities.
2. a kind of novel bearing Heat Treatment Of Steel technology according to claim 1 is characterized in that:
1) steel heat treatment process:
Normalizing treatment: steel are heated to temperature when being 870～880 ℃ in stove, insulation 1h, the steel fan cooling in air of coming out of the stove;
Anneal: steel are heated in stove and are incubated 1h when temperature is 700～710 ℃, reheat is incubated 3h when temperature is 760～770 ℃, and then cool to the temperature time insulation 4h that is 680～690 ℃, and when being cooled to 550～600 ℃ with the speed of 30 ℃/h at last, furnace cooling;
2) work in-process thermal treatment process after the workpiece mechanical workout:
Quench treatment: workpiece is heated to temperature when being 790～800 ℃ in stove, and insulation 45～60min, workpiece come out of the stove the back at oil quenching;
Temper: workpiece is heated to temperature when being 150～160 ℃ in stove, insulation 4h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810230524A CN101724786A (en) | 2008-10-22 | 2008-10-22 | Bearing steel and technology for heating processing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810230524A CN101724786A (en) | 2008-10-22 | 2008-10-22 | Bearing steel and technology for heating processing |
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| Publication Number | Publication Date |
|---|---|
| CN101724786A true CN101724786A (en) | 2010-06-09 |
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| CN200810230524A Pending CN101724786A (en) | 2008-10-22 | 2008-10-22 | Bearing steel and technology for heating processing |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876858A (en) * | 2012-09-20 | 2013-01-16 | 洛阳鼎辉特钢制品股份有限公司 | Spheroidizing annealing process of GCr15 ball bearing steels based on severe-convection protective gas |
| CN104328250A (en) * | 2014-11-27 | 2015-02-04 | 王俐帧 | Heat treatment process of bearing steel |
| 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 |
| CN106521310A (en) * | 2016-10-27 | 2017-03-22 | 马钢(集团)控股有限公司 | Steel used for quartering hammer piston rods, and thermal treatment method thereof |
| CN107400769A (en) * | 2017-07-25 | 2017-11-28 | 合肥欧仕嘉机电设备有限公司 | A kind of bearing steel heat treatment process |
| CN107433429A (en) * | 2017-09-19 | 2017-12-05 | 芜湖金智王机械设备有限公司 | The processing method of high-precision bearing lasso |
| CN107904387A (en) * | 2017-11-19 | 2018-04-13 | 深圳万佳互动科技有限公司 | A kind of Gear Shaft Heat Treatment |
| CN108103292A (en) * | 2017-12-29 | 2018-06-01 | 苏州欧鹏自动化设备有限公司 | A kind of leading screw heat treatment process |
| CN110643790A (en) * | 2019-10-31 | 2020-01-03 | 武汉理工大学 | Heat treatment process for bearing steel with high dimensional stability |
| CN114875215A (en) * | 2022-05-11 | 2022-08-09 | 温州为尚机械有限公司 | Grain size heat treatment method for high-carbon chromium bearing steel |
| CN114990428A (en) * | 2022-05-07 | 2022-09-02 | 清华大学 | Cr-Mo-Co-W high-temperature bearing steel and preparation method thereof |
| WO2024169713A1 (en) * | 2023-02-17 | 2024-08-22 | 宝山钢铁股份有限公司 | Bearing steel for vehicle hub and manufacturing method for bearing steel |
-
2008
- 2008-10-22 CN CN200810230524A patent/CN101724786A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876858A (en) * | 2012-09-20 | 2013-01-16 | 洛阳鼎辉特钢制品股份有限公司 | Spheroidizing annealing process of GCr15 ball bearing steels based on severe-convection protective gas |
| CN104328250A (en) * | 2014-11-27 | 2015-02-04 | 王俐帧 | Heat treatment process of bearing steel |
| 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 |
| CN106521310A (en) * | 2016-10-27 | 2017-03-22 | 马钢(集团)控股有限公司 | Steel used for quartering hammer piston rods, and thermal treatment method thereof |
| CN107400769A (en) * | 2017-07-25 | 2017-11-28 | 合肥欧仕嘉机电设备有限公司 | A kind of bearing steel heat treatment process |
| CN107433429A (en) * | 2017-09-19 | 2017-12-05 | 芜湖金智王机械设备有限公司 | The processing method of high-precision bearing lasso |
| CN107904387A (en) * | 2017-11-19 | 2018-04-13 | 深圳万佳互动科技有限公司 | A kind of Gear Shaft Heat Treatment |
| CN108103292A (en) * | 2017-12-29 | 2018-06-01 | 苏州欧鹏自动化设备有限公司 | A kind of leading screw heat treatment process |
| CN110643790A (en) * | 2019-10-31 | 2020-01-03 | 武汉理工大学 | Heat treatment process for bearing steel with high dimensional stability |
| CN114990428A (en) * | 2022-05-07 | 2022-09-02 | 清华大学 | Cr-Mo-Co-W high-temperature bearing steel and preparation method thereof |
| CN114875215A (en) * | 2022-05-11 | 2022-08-09 | 温州为尚机械有限公司 | Grain size heat treatment method for high-carbon chromium bearing steel |
| WO2024169713A1 (en) * | 2023-02-17 | 2024-08-22 | 宝山钢铁股份有限公司 | Bearing steel for vehicle hub and manufacturing method for bearing steel |
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Application publication date: 20100609 |