CN104328250A - Heat treatment process of bearing steel - Google Patents
Heat treatment process of bearing steel Download PDFInfo
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- CN104328250A CN104328250A CN201410695963.8A CN201410695963A CN104328250A CN 104328250 A CN104328250 A CN 104328250A CN 201410695963 A CN201410695963 A CN 201410695963A CN 104328250 A CN104328250 A CN 104328250A
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Abstract
The invention discloses a heat treatment process of bearing steel. The heat treatment process comprises the following steps: normalizing, annealing, preheating, quenching, tempering, carrying out freezing treatment and aging treatment, carrying out heat preservation and grinding. Due to the process method, the treated workpiece has the advantages of high surface hardness, good wear resistance and high accuracy.
Description
Technical field
The present invention be more particularly directed to a kind of bearing steel thermal treatment process.
Background technology
In prior art, when to the gauge block thermal treatment of bearing steel, usually adopt first modifier treatment, then carry out nitrogencase hardening technique, in use easily there is phenomena of dimensional variation in the gauge block after process, precise decreasing, and measuring error is large.
Summary of the invention
In order to solve problems of the prior art, the invention provides a kind of thermal treatment process of bearing steel.
Technical scheme of the present invention is: a kind of bearing steel thermal treatment process, comprises the steps:
(1) normalizing treatment: steel are heated to temperature 350 DEG C ~ 500 DEG C in stove, is incubated 1 hour, naturally cooling in atmosphere;
(2) anneal: steel are heated to temperature 400 DEG C ~ 500 DEG C in stove, is incubated 1 hour;
(3) preheating: be placed in process furnace by the workpiece through Spheroidizing Annealing process, preheats 30 ~ 35 minutes at 400 DEG C ~ 700 DEG C temperature;
(4) quench: the workpiece after above-mentioned preheating is placed in thermohaline liquid furnace, be incubated 18 ~ 22 minutes at 840 DEG C ~ 850 DEG C temperature after, workpiece taken out, cools in quench rapidly solar oil or No. 10 machine oil, take out when workpiece temperature is down to 200 DEG C, rinse well with water;
(3) tempering: it is 150 DEG C ~ 170 DEG C that workpiece is heated to temperature in stove, is incubated 4 hours;
(4) freezing treatment: the workpiece after quench treatment was put into refrigerated tank in time in 30 minutes, is incubated 2 ~ 4 hours at-75 DEG C ~-80 DEG C temperature;
(5) ageing treatment: after the workpiece corase grind after freezing, be placed in oil oven insulation can, be incubated 35 ~ 36 hours at 110 DEG C ~ 120 DEG C temperature after, take out slow cooling;
(6) be incubated, grind: after the workpiece fine grinding after ageing treatment, then put into oil oven insulation can, be incubated 7.5 ~ 8 hours at 110 DEG C ~ 120 DEG C temperature after, proceed to grinding step.
Beneficial effect of the present invention: adopt above processing method, the workpiece surface hardness after process is high, wear resisting property good, precision is high.
Embodiment
Embodiment provided by the invention is described in further detail:
A kind of bearing steel thermal treatment process, comprises the steps:
(1) normalizing treatment: steel are heated to temperature 350 DEG C ~ 500 DEG C in stove, is incubated 1 hour, naturally cooling in atmosphere;
(2) anneal: steel are heated to temperature 400 DEG C ~ 500 DEG C in stove, is incubated 1 hour;
(3) preheating: be placed in process furnace by the workpiece through Spheroidizing Annealing process, preheats 30 ~ 35 minutes at 400 DEG C ~ 700 DEG C temperature;
(4) quench: the workpiece after above-mentioned preheating is placed in thermohaline liquid furnace, be incubated 18 ~ 22 minutes at 840 DEG C ~ 850 DEG C temperature after, workpiece taken out, cools in quench rapidly solar oil or No. 10 machine oil, take out when workpiece temperature is down to 200 DEG C, rinse well with water;
(3) tempering: it is 150 DEG C ~ 170 DEG C that workpiece is heated to temperature in stove, is incubated 4 hours;
(4) freezing treatment: the workpiece after quench treatment was put into refrigerated tank in time in 30 minutes, is incubated 2 ~ 4 hours at-75 DEG C ~-80 DEG C temperature;
(5) ageing treatment: after the workpiece corase grind after freezing, be placed in oil oven insulation can, be incubated 35 ~ 36 hours at 110 DEG C ~ 120 DEG C temperature after, take out slow cooling;
(6) be incubated, grind: after the workpiece fine grinding after ageing treatment, then put into oil oven insulation can, be incubated 7.5 ~ 8 hours at 110 DEG C ~ 120 DEG C temperature after, proceed to grinding step.
In this description, the present invention is described with reference to its specific embodiment.But, still can make various amendment and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification sheets is regarded in an illustrative, rather than a restrictive.
Claims (1)
1. a bearing steel thermal treatment process, is characterized in that, comprises the steps:
(1) normalizing treatment: steel are heated to temperature 350 DEG C ~ 500 DEG C in stove, is incubated 1 hour, naturally cooling in atmosphere;
(2) anneal: steel are heated to temperature 400 DEG C ~ 500 DEG C in stove, is incubated 1 hour;
(3) preheating: be placed in process furnace by the workpiece through Spheroidizing Annealing process, preheats 30 ~ 35 minutes at 400 DEG C ~ 700 DEG C temperature;
(4) quench: the workpiece after above-mentioned preheating is placed in thermohaline liquid furnace, be incubated 18 ~ 22 minutes at 840 DEG C ~ 850 DEG C temperature after, workpiece taken out, cools in quench rapidly solar oil or No. 10 machine oil, take out when workpiece temperature is down to 200 DEG C, rinse well with water;
(3) tempering: it is 150 DEG C ~ 170 DEG C that workpiece is heated to temperature in stove, is incubated 4 hours;
(4) freezing treatment: the workpiece after quench treatment was put into refrigerated tank in time in 30 minutes, is incubated 2 ~ 4 hours at-75 DEG C ~-80 DEG C temperature;
(5) ageing treatment: after the workpiece corase grind after freezing, be placed in oil oven insulation can, be incubated 35 ~ 36 hours at 110 DEG C ~ 120 DEG C temperature after, take out slow cooling;
(6) be incubated, grind: after the workpiece fine grinding after ageing treatment, then put into oil oven insulation can, be incubated 7.5 ~ 8 hours at 110 DEG C ~ 120 DEG C temperature after, proceed to grinding step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410695963.8A CN104328250A (en) | 2014-11-27 | 2014-11-27 | Heat treatment process of bearing steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410695963.8A CN104328250A (en) | 2014-11-27 | 2014-11-27 | Heat treatment process of bearing steel |
Publications (1)
| Publication Number | Publication Date |
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| CN104328250A true CN104328250A (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410695963.8A Pending CN104328250A (en) | 2014-11-27 | 2014-11-27 | Heat treatment process of bearing steel |
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| CN (1) | CN104328250A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106435106A (en) * | 2016-12-02 | 2017-02-22 | 机械科学研究总院青岛分院 | Bearing steel heat treatment technology |
| CN107419076A (en) * | 2017-07-26 | 2017-12-01 | 繁昌县华特机械制造有限公司 | A kind of mould steel heat treatment process |
| WO2018103079A1 (en) * | 2016-12-09 | 2018-06-14 | 机械科学研究总院青岛分院有限公司 | Heat treatment process for increasing resilience of bearing steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3567435A (en) * | 1966-11-24 | 1971-03-02 | Ugine Kuhlmann | High strength steel containing chromium and sulfur |
| KR100206353B1 (en) * | 1996-06-05 | 1999-07-01 | 전선기 | Method of high purity carbonization bearing steel and the same product |
| CN101724742A (en) * | 2008-10-22 | 2010-06-09 | 洛阳轴研科技股份有限公司 | Heat treatment process of notch ductile steel bearing balls |
| CN101724786A (en) * | 2008-10-22 | 2010-06-09 | 洛阳轴研科技股份有限公司 | Bearing steel and technology for heating processing |
| CN103215427A (en) * | 2013-05-03 | 2013-07-24 | 衡阳风顺车桥有限公司 | Heat treatment process of gauge block made of bearing steel |
| CN104099454A (en) * | 2014-07-28 | 2014-10-15 | 新昌县南明街道锦泰机械厂 | Heat treatment process of novel bearing steel |
-
2014
- 2014-11-27 CN CN201410695963.8A patent/CN104328250A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3567435A (en) * | 1966-11-24 | 1971-03-02 | Ugine Kuhlmann | High strength steel containing chromium and sulfur |
| KR100206353B1 (en) * | 1996-06-05 | 1999-07-01 | 전선기 | Method of high purity carbonization bearing steel and the same product |
| CN101724742A (en) * | 2008-10-22 | 2010-06-09 | 洛阳轴研科技股份有限公司 | Heat treatment process of notch ductile steel bearing balls |
| CN101724786A (en) * | 2008-10-22 | 2010-06-09 | 洛阳轴研科技股份有限公司 | Bearing steel and technology for heating processing |
| CN103215427A (en) * | 2013-05-03 | 2013-07-24 | 衡阳风顺车桥有限公司 | Heat treatment process of gauge block made of bearing steel |
| CN104099454A (en) * | 2014-07-28 | 2014-10-15 | 新昌县南明街道锦泰机械厂 | Heat treatment process of novel bearing steel |
Non-Patent Citations (1)
| Title |
|---|
| 唐孝杰: "淬火新工艺与预备热处理", 《金属热处理》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106435106A (en) * | 2016-12-02 | 2017-02-22 | 机械科学研究总院青岛分院 | Bearing steel heat treatment technology |
| WO2018103079A1 (en) * | 2016-12-09 | 2018-06-14 | 机械科学研究总院青岛分院有限公司 | Heat treatment process for increasing resilience of bearing steel |
| CN107419076A (en) * | 2017-07-26 | 2017-12-01 | 繁昌县华特机械制造有限公司 | A kind of mould steel heat treatment process |
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Application publication date: 20150204 |
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