CN103484619A - Heat treatment method of GCr15 bearing steel - Google Patents
Heat treatment method of GCr15 bearing steel Download PDFInfo
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- CN103484619A CN103484619A CN201310443735.7A CN201310443735A CN103484619A CN 103484619 A CN103484619 A CN 103484619A CN 201310443735 A CN201310443735 A CN 201310443735A CN 103484619 A CN103484619 A CN 103484619A
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Abstract
The invention provides a heat treatment method of GCr15 bearing steel. The heat treatment method of the GCr15 bearing steel comprises the following steps: (1) heating the GCr15 bearing steel to 1100-1110 DEG C, cooling the GCr15 bearing steel to 600-620 DEG C in a furnace, and preserving heat for 3-4 hours; heating the GCr15 bearing steel again to 820-830 DEG C, and preserving heat for 20-30min; cooling the GCr15 bearing steel to below 500 DEG C in the furnace, discharging the GCr15 bearing steel and performing air cooling; (2) heating the GCr15 bearing steel to 810-820 DEG C, preserving heat for 40-50min, and quenching; and (3) cooling the GCr15 bearing steel to 200-210 DEG C, and performing low temperature tempering treatment. The GCr15 bearing steel prepared by the heat treatment method can ensure high size stability of a bearing, thereby prolonging the service life of the bearing.
Description
Technical field
The invention belongs to the heat treatment technics field, be specifically related to a kind of heat treating method of GCr15 bearing steel.
Background technology
The GCr15 steel is the less high-carbon-chromium bearing steel of a kind of alloy content, and have height after quenching adds tempering hardness, good wear resistance, high contact fatigue property are widely used in each class bearing uniformly because of it.
After the GCr15 steel is forged by normal technological specification, usually also need to carry out follow-up thermal treatment.In general, thermal treatment comprises pre-treatment and processes eventually; Conventional pretreatment technology is Spheroidizing Annealing, and whole treatment process is quenching, low-temperaturetempering.Common Gcr15 steel ball annealing technique is 780-810 ℃ of heating 2-3h, 710-730 ℃ of isothermal 4-5h, and stove is chilled to below 650 ℃ the air cooling of coming out of the stove, after whole treatment process parameter is 820-840 ℃ of oil quenching, 150-200 ℃ of low-temperaturetempering.Still, in the complete processing of traditional bearing, in the modifier treatment operation, the blank bar can produce quenching crack in irregular shape usually, and some quenching cracks even run through whole blank bar.In addition, the complete processing of traditional bearing also easily produces residual austenite, makes bearing easily occur that residual austenite is to martensitic transformation in using operational process, causes the bearing volumetric expansion and forms internal stress, thereby the size that bearing occurs is unstable, cause the lifetime of bearing.
Summary of the invention
The invention provides a kind of heat treating method of GCr15 bearing steel, the work-ing life that is conducive to improve the dimensional stability of bearing and extends bearing.
The invention provides a kind of heat treating method of GCr15 bearing steel, step is as follows:
1), first the GCr15 steel is heated to 1100-1110 ℃, then in stove, be cooled to 600-620 ℃ of insulation 3-4 hour; Afterwards the GCr15 steel is warming up to again to 820-830 ℃ of insulation 20-30min; Then be cooled to below 500 ℃ the air cooling of coming out of the stove in stove;
2), be heated to 810-820 ℃, insulation 40-50min, quenching;
Carry out the low-temperaturetempering processing while 3), being cooled to 200-210 ℃.
Preferably, in step (1), first the GCr15 steel is heated to 1110 ℃, then in stove, is cooled to 610 ℃ of insulations 3 hours; Afterwards the GCr15 steel is warming up to again to 820 ℃ of insulation 25min; Then be cooled to below 500 ℃ the air cooling of coming out of the stove in stove.
Preferably, the medium quenched described in step (2) is quenching oil, and the temperature of described quenching is 50-60 ℃.
The temperature of preferably, quenching described in step (2) is 55 ℃.
Preferably, in step (2), be heated to 815 ℃, insulation 45min.
Carry out the low-temperaturetempering processing while preferably, in step (3), being cooled to 205 ℃.
Preferably, in step (3), the time of tempering is 1-2 hour.
Preferably, in step (3), the time of tempering is 1.5 hours.
Apply the GCr15 bearing steel that method of the present invention obtains, the good stability of the dimension of bearing, thus extended work-ing life of bearing.
Embodiment
embodiment 1
The heat treating method of a kind of GCr15 bearing steel of the present invention, step is as follows:
1), first the GCr15 steel is heated to 1110 ℃, then in stove, be cooled to 610 ℃ of insulations 3 hours; Afterwards the GCr15 steel is warming up to again to 820 ℃ of insulation 25min; Then be cooled to below 500 ℃ the air cooling of coming out of the stove in stove;
2), be heated to 815 ℃, insulation 45min, quench with quenching oil, the quenching oil temperature is 55 ℃;
3), carry out the low-temperaturetempering processing while being cooled to 205 ℃, tempering time is 1.5 hours.
embodiment 2
The heat treating method of a kind of GCr15 bearing steel of the present invention, step is as follows:
1), first the GCr15 steel is heated to 1100 ℃, then in stove, be cooled to 610 ℃ of insulations 3 hours; Afterwards the GCr15 steel is warming up to again to 820 ℃ of insulation 20min; Then be cooled to below 500 ℃ the air cooling of coming out of the stove in stove;
2), be heated to 810 ℃, insulation 45min, quench with quenching oil, the quenching oil temperature is 50 ℃;
3), carry out the low-temperaturetempering processing while being cooled to 205 ℃, tempering time is 2 hours.
embodiment 3
The heat treating method of a kind of GCr15 bearing steel of the present invention, step is as follows:
1), first the GCr15 steel is heated to 1100 ℃, then in stove, be cooled to 620 ℃ of insulations 3 hours; Afterwards the GCr15 steel is warming up to again to 830 ℃ of insulation 20min; Then be cooled to below 500 ℃ the air cooling of coming out of the stove in stove;
2), be heated to 810 ℃, insulation 45min, quench with quenching oil, the quenching oil temperature is 55 ℃;
3), carry out the low-temperaturetempering processing while being cooled to 205 ℃, tempering time is 1 hour.
embodiment 4
The heat treating method of a kind of GCr15 bearing steel of the present invention, step is as follows:
1), first the GCr15 steel is heated to 1105 ℃, then in stove, be cooled to 620 ℃ of insulations 3 hours; Afterwards the GCr15 steel is warming up to again to 830 ℃ of insulation 30min; Then be cooled to below 500 ℃ the air cooling of coming out of the stove in stove;
2), be heated to 810 ℃, insulation 50min, quench with quenching oil, the quenching oil temperature is 57 ℃;
3), carry out the low-temperaturetempering processing while being cooled to 200 ℃, tempering time is 1 hour.
embodiment 5
The heat treating method of a kind of GCr15 bearing steel of the present invention, step is as follows:
1), first the GCr15 steel is heated to 1105 ℃, then in stove, be cooled to 620 ℃ of insulations 3.5 hours; Afterwards the GCr15 steel is warming up to again to 820 ℃ of insulation 30min; Then be cooled to below 500 ℃ the air cooling of coming out of the stove in stove;
2), be heated to 820 ℃, insulation 50min, quench with quenching oil, the quenching oil temperature is 55 ℃;
3), carry out the low-temperaturetempering processing while being cooled to 205 ℃, tempering time is 1 hour.
embodiment 6
The heat treating method of a kind of GCr15 bearing steel of the present invention, step is as follows:
1), first the GCr15 steel is heated to 1105 ℃, then in stove, be cooled to 605 ℃ of insulations 3.5 hours; Afterwards the GCr15 steel is warming up to again to 830 ℃ of insulation 30min; Then be cooled to below 500 ℃ the air cooling of coming out of the stove in stove;
2), be heated to 820 ℃, insulation 50min, quench with quenching oil, the quenching oil temperature is 60 ℃;
3), carry out the low-temperaturetempering processing while being cooled to 205 ℃, tempering time is 1 hour.
embodiment 7
The heat treating method of a kind of GCr15 bearing steel of the present invention, step is as follows:
1), first the GCr15 steel is heated to 1100 ℃, then in stove, be cooled to 605 ℃ of insulations 3.5 hours; Afterwards the GCr15 steel is warming up to again to 825 ℃ of insulation 30min; Then be cooled to below 500 ℃ the air cooling of coming out of the stove in stove;
2), be heated to 820 ℃, insulation 50min, quench with quenching oil, the quenching oil temperature is 52 ℃;
3), carry out the low-temperaturetempering processing while being cooled to 203 ℃, tempering time is 2 hours.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment, the present invention is had been described in detail, for a person skilled in the art, its technical scheme that still can put down in writing aforementioned each embodiment is modified, or part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. the heat treating method of a GCr15 bearing steel, step is as follows:
(1), first the GCr15 steel is heated to 1100-1110 ℃, then in stove, be cooled to 600-620 ℃ of insulation 3-4 hour; Afterwards the GCr15 steel is warming up to again to 820-830 ℃ of insulation 20-30min; Then be cooled to below 500 ℃ the air cooling of coming out of the stove in stove;
(2), be heated to 810-820 ℃, insulation 40-50min, quenching;
(3) carry out the low-temperaturetempering processing while, being cooled to 200-210 ℃.
2. heat treating method according to claim 1, is characterized in that: in step (1), first the GCr15 steel is heated to 1110 ℃, then in stove, is cooled to 610 ℃ of insulations 3 hours; Afterwards the GCr15 steel is warming up to again to 820 ℃ of insulation 25min; Then be cooled to below 500 ℃ the air cooling of coming out of the stove in stove.
3. heat treating method according to claim 1 is characterized in that: the medium quenched described in step (2) is quenching oil, and the temperature of described quenching is 50-60 ℃.
4. heat treating method according to claim 3 is characterized in that: the temperature of quenching described in step (2) is 55 ℃.
5. heat treating method according to claim 1, is characterized in that: be heated to 815 ℃ in step (2), insulation 45min.
6. heat treating method according to claim 1, is characterized in that: carry out the low-temperaturetempering processing while in step (3), being cooled to 205 ℃.
7. heat treating method according to claim 1 is characterized in that: in step (3), the time of tempering is 1-2 hour.
8. heat treating method according to claim 7 is characterized in that: in step (3), the time of tempering is 1.5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310443735.7A CN103484619A (en) | 2013-09-26 | 2013-09-26 | Heat treatment method of GCr15 bearing steel |
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| CN201310443735.7A CN103484619A (en) | 2013-09-26 | 2013-09-26 | Heat treatment method of GCr15 bearing steel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104117825A (en) * | 2014-07-24 | 2014-10-29 | 成都亨通兆业精密机械有限公司 | Method for manufacturing ring gauge with GCr15 as base material |
| CN111270122A (en) * | 2019-12-25 | 2020-06-12 | 邢台德龙机械轧辊有限公司 | Manufacturing method of niobium microalloyed cold roll and niobium microalloyed cold roll |
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| JP2006144055A (en) * | 2004-11-17 | 2006-06-08 | Nsk Ltd | Method for heat-treating steel, method for manufacturing component in unit for supporting ball, and unit for supporting ball |
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| CN102758068A (en) * | 2012-07-27 | 2012-10-31 | 浙江吉利汽车研究院有限公司杭州分公司 | Heat treatment method of GCr15 steel |
| CN102864292A (en) * | 2011-07-06 | 2013-01-09 | 上海热处理厂有限公司 | Heat treatment process for strengthening and toughening GCr15 knife roller |
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2013
- 2013-09-26 CN CN201310443735.7A patent/CN103484619A/en active Pending
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| JP2006144055A (en) * | 2004-11-17 | 2006-06-08 | Nsk Ltd | Method for heat-treating steel, method for manufacturing component in unit for supporting ball, and unit for supporting ball |
| CN101748248A (en) * | 2008-12-17 | 2010-06-23 | 上海人本集团有限公司 | Surface refining process for high-carbon chromium (GCr15) bearing after carbonitriding treatment |
| CN101798657A (en) * | 2010-04-01 | 2010-08-11 | 戚正风 | Micro-alloy chemical die steel and thermal treatment method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104117825A (en) * | 2014-07-24 | 2014-10-29 | 成都亨通兆业精密机械有限公司 | Method for manufacturing ring gauge with GCr15 as base material |
| CN111270122A (en) * | 2019-12-25 | 2020-06-12 | 邢台德龙机械轧辊有限公司 | Manufacturing method of niobium microalloyed cold roll and niobium microalloyed cold roll |
| CN111270122B (en) * | 2019-12-25 | 2021-11-02 | 邢台德龙机械轧辊有限公司 | Manufacturing method of niobium microalloyed cold roll and niobium microalloyed cold roll |
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