CN104057255A - Manufacturing process of GCr15 steel precision bearing ring - Google Patents
Manufacturing process of GCr15 steel precision bearing ring Download PDFInfo
- Publication number
- CN104057255A CN104057255A CN201410288649.8A CN201410288649A CN104057255A CN 104057255 A CN104057255 A CN 104057255A CN 201410288649 A CN201410288649 A CN 201410288649A CN 104057255 A CN104057255 A CN 104057255A
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- manufacturing process
- bearing ring
- precision bearing
- gcr15 steel
- steel precision
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- 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
- C21D6/00—Heat treatment of ferrous alloys
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to a heat treatment process of bearing parts, and specifically relates to a manufacturing process of a GCr15 steel precision bearing ring. The manufacturing process comprises the following steps of: blank forging; spheroidizing annealing; mechanical cutting; quenching; cold treatment; low-temperature tempering; coarse grinding; aging; finish grinding; and aging. After the heat treatment process, the GCr15 steel precision bearing ring part has actually measured hardness of 61 to 64RC, an average carbide particle size of about 0.5 mu m, residual austenite of about 2.8%, dimensional stability, and deformation of less than 1 mu m.
Description
Technical field
The present invention relates to bearing parts Technology for Heating Processing, specifically a kind of manufacturing process of GCr15 steel precision bearing ring.
Background technology
Precision bearing when work, bear the alternation contact compression level friction up to 300 ~ 500MPa, and bear the etch etc. of medium.Its failure characteristics is: because excessive wear or stress relaxation lose precision; Because contact fatigue surface produces pit; Because raw material shape and distribution of carbides is bad or the not enough embrittlement of toughness etc.Therefore, precision bearing part requires very high to blank original structure, and should have high strength after heat treatment, good toughness, wearability, corrosion resistance level dimensional stability etc., and the bearing of working in particular surroundings, also needs corrosion-resistant, high temperature resistant, nonmagnetic etc.
GCr15 steel is that a kind of alloy content is less, most widely used high-carbon-chromium bearing steel.Add lonneal through quenching after, there is higher hardness, uniform tissue, good wearability, high contact fatigue property.This steel cold working plasticity is medium, and cutting ability is general, and welding performance is poor, can be large to forming susceptibility of flake formation, there is temper brittleness.
GCr15 is a kind of the most frequently used high-carbon-chromium bearing steel, has higher quenching degree, can obtain high and uniform hardness after heat treatment.Wearability is better than GCr9, and contact fatigue strength is high, has good dimensional stability and corrosion stability, and cold deformation plasticity is medium, and machinability is general, and weldability is poor, and white point is formed to sensitivity, has first kind temper brittleness.
Summary of the invention
The present invention is directed to above-mentioned technical problem provides a kind of manufacturing process of GCr15 steel precision bearing ring.
The present invention adopts following scheme: the manufacturing process of GCr15 steel precision bearing ring, comprises following step:
Step 1, blank forging rolling;
Step 2, spheroidizing;
Step 3, machine cut processing;
Step 4, quenching;
Step 5, cold treatment;
Step 6, lonneal;
Step 7, corase grind;
Step 8, timeliness;
Step 9, fine grinding;
Step 10, timeliness.
Before step 2 spheroidizing, blank is carried out to conditioning treatment: specifically adopt forging rolling immediate quenching to increase temperature temper.
Described quenching adopts grade quench: at the BaCl of abundant deoxidation
2in the salt bath furnace of each 50% mass fraction of Nacl, in 840 ~ 850 DEG C add after heat penetration burns, proceed in 200 DEG C of deep fats, keep 3min after oil cooling.
Described tempering: air cooling keep 2.5 ~ 3.5h in the salt made from earth containing a comparatively high percentage of sodium chloride of 215 ~ 225 DEG C are bathed after.
Described cold treatment: in the medium of liquid CO 2+alcohol, naturally go back up to room temperature after-78 ~-80 DEG C of maintenance 2 ~ 3h and proceed to corase grind operation.
Described timeliness: in the incubator with fan, in 135 DEG C of maintenance 5h, air cooling proceeds to precision grinding process after room temperature.
Timeliness again after fine grinding: 130 ~ 140 DEG C, air cooling after insulation 10h.
Beneficial effect of the present invention:
Through the GCr15 steel precision bearing shaped part measured hardness after this Technology for Heating Processing, between 61 ~ 64RC, carbide particle is approximately 0.5 μ m on average, retained austenite approximately 2.8%, and dimensionally stable, distortion is less than 1 μ m.
Detailed description of the invention
Below in conjunction with specific embodiment, the manufacturing process of GCr15 steel precision bearing ring of the present invention is elaborated.
GCr15 steel precision bearing ring manufacturing process, comprises following step:
Step 1, blank forging rolling;
Step 2, spheroidizing;
Step 3, machine cut processing;
Step 4, quenching;
Step 5, cold treatment;
Step 6, lonneal;
Step 7, corase grind;
Step 8, timeliness;
Step 9, fine grinding;
Step 10, timeliness.
Before step 2 spheroidizing, blank is carried out to conditioning treatment: specifically adopt forging rolling immediate quenching to increase temperature temper.
Described quenching adopts grade quench: at the BaCl of abundant deoxidation
2in the salt bath furnace of each 50% mass fraction of Nacl, in 840 ~ 850 DEG C add after heat penetration burns, proceed in 200 DEG C of deep fats, keep 3min after oil cooling.
Described tempering: air cooling keep 2.5 ~ 3.5h in the salt made from earth containing a comparatively high percentage of sodium chloride of 215 ~ 225 DEG C are bathed after.
Described cold treatment: in the medium of liquid CO 2+alcohol, naturally go back up to room temperature after-78 ~-80 DEG C of maintenance 2 ~ 3h and proceed to corase grind operation.
Described timeliness: in the incubator with fan, in 135 DEG C of maintenance 5h, air cooling proceeds to precision grinding process after room temperature.
Timeliness again after fine grinding: 130 ~ 140 DEG C, air cooling after insulation 10h.
Result: measured hardness is 61HRC, carbide particle is approximately 0.5 μ m on average, retained austenite approximately 2.8%, dimensionally stable, distortion is less than 1 μ m.
Claims (7)
1. a manufacturing process for GCr15 steel precision bearing ring, is characterized in that, comprises following step:
Step 1, blank forging rolling;
Step 2, spheroidizing;
Step 3, machine cut processing;
Step 4, quenching;
Step 5, cold treatment;
Step 6, lonneal;
Step 7, corase grind;
Step 8, timeliness;
Step 9, fine grinding;
Step 10, timeliness.
2. the manufacturing process of GCr15 steel precision bearing ring according to claim 1, is characterized in that, before step 2 spheroidizing, blank is carried out to conditioning treatment: specifically adopt forging rolling immediate quenching to increase temperature temper.
3. the manufacturing process of GCr15 steel precision bearing ring according to claim 1, is characterized in that, described quenching adopts grade quench: at the BaCl of abundant deoxidation
2in the salt bath furnace of each 50% mass fraction of Nacl, in 840 ~ 850 DEG C add after heat penetration burns, proceed in 200 DEG C of deep fats, keep 3min after oil cooling.
4. the manufacturing process of GCr15 steel precision bearing ring according to claim 1, is characterized in that, described tempering: air cooling keep 2.5 ~ 3.5h in the salt made from earth containing a comparatively high percentage of sodium chloride of 215 ~ 225 DEG C are bathed after.
5. the manufacturing process of GCr15 steel precision bearing ring according to claim 1, is characterized in that, described cold treatment: in the medium of liquid CO 2+alcohol, naturally go back up to room temperature and proceed to corase grind operation after-78 ~-80 DEG C of maintenance 2 ~ 3h.
6. the manufacturing process of GCr15 steel precision bearing ring according to claim 1, is characterized in that, described timeliness: in the incubator with fan, in 135 DEG C of maintenance 5h, air cooling proceeds to precision grinding process after room temperature.
7. the manufacturing process of GCr15 steel precision bearing ring according to claim 1, is characterized in that, timeliness again after fine grinding: 130 ~ 140 DEG C, and air cooling after insulation 10h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410288649.8A CN104057255A (en) | 2014-06-26 | 2014-06-26 | Manufacturing process of GCr15 steel precision bearing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410288649.8A CN104057255A (en) | 2014-06-26 | 2014-06-26 | Manufacturing process of GCr15 steel precision bearing ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104057255A true CN104057255A (en) | 2014-09-24 |
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| CN201410288649.8A Withdrawn CN104057255A (en) | 2014-06-26 | 2014-06-26 | Manufacturing process of GCr15 steel precision bearing ring |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353976A (en) * | 2014-10-29 | 2015-02-18 | 江阴尚爵回转驱动制造有限公司 | Slewing bearing machining and heat treatment process |
| CN104985394A (en) * | 2015-06-17 | 2015-10-21 | 沈阳飞机工业（集团）有限公司 | Contour refined machining method for high-strength steel bearing ring |
| CN105196011A (en) * | 2015-09-16 | 2015-12-30 | 贵州群建精密机械有限公司 | Processing method of work gear in low-temperature environment |
| CN105834670A (en) * | 2016-03-28 | 2016-08-10 | 江苏科技大学 | Technological method for preventing delayed cracks of idler wheel |
| CN105964853A (en) * | 2016-06-20 | 2016-09-28 | 安徽省瑞杰锻造有限责任公司 | Free forging process of GCr15 bearing ring |
| CN108842040A (en) * | 2018-06-28 | 2018-11-20 | 张家港中环海陆特锻股份有限公司 | The ring manufacturing process of forged hardening is used using 42CrMo as material |
| CN110468264A (en) * | 2019-09-06 | 2019-11-19 | 西京学院 | A kind of raising fine measuring instrument, die steel dimensional stability treatment process |
| CN112481477A (en) * | 2020-10-28 | 2021-03-12 | 江麓机电集团有限公司 | Heat treatment method of 30CrMnSiA thin steel plate fine punching part |
| CN114480797A (en) * | 2022-01-27 | 2022-05-13 | 石狮市汇星机械有限公司 | Heat treatment process method for producing knitting machine cam by using GCr15 steel |
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| JP2000248313A (en) * | 1999-02-26 | 2000-09-12 | Daido Steel Co Ltd | Spheroidizing heat treatment of steel slab |
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| 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 |
| 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 |
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2014
- 2014-06-26 CN CN201410288649.8A patent/CN104057255A/en not_active Withdrawn
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353976A (en) * | 2014-10-29 | 2015-02-18 | 江阴尚爵回转驱动制造有限公司 | Slewing bearing machining and heat treatment process |
| CN104985394A (en) * | 2015-06-17 | 2015-10-21 | 沈阳飞机工业（集团）有限公司 | Contour refined machining method for high-strength steel bearing ring |
| CN105196011A (en) * | 2015-09-16 | 2015-12-30 | 贵州群建精密机械有限公司 | Processing method of work gear in low-temperature environment |
| CN105196011B (en) * | 2015-09-16 | 2017-09-12 | 贵州群建精密机械有限公司 | A kind of processing method of working gear at low ambient temperatures |
| CN105834670A (en) * | 2016-03-28 | 2016-08-10 | 江苏科技大学 | Technological method for preventing delayed cracks of idler wheel |
| CN105834670B (en) * | 2016-03-28 | 2018-10-23 | 江苏科技大学 | A kind of process preventing idler wheel delayed crack |
| CN105964853A (en) * | 2016-06-20 | 2016-09-28 | 安徽省瑞杰锻造有限责任公司 | Free forging process of GCr15 bearing ring |
| CN105964853B (en) * | 2016-06-20 | 2018-01-23 | 安徽省瑞杰锻造有限责任公司 | The free forging process of GCr15 bearing rings |
| CN108842040A (en) * | 2018-06-28 | 2018-11-20 | 张家港中环海陆特锻股份有限公司 | The ring manufacturing process of forged hardening is used using 42CrMo as material |
| CN110468264A (en) * | 2019-09-06 | 2019-11-19 | 西京学院 | A kind of raising fine measuring instrument, die steel dimensional stability treatment process |
| CN112481477A (en) * | 2020-10-28 | 2021-03-12 | 江麓机电集团有限公司 | Heat treatment method of 30CrMnSiA thin steel plate fine punching part |
| CN114480797A (en) * | 2022-01-27 | 2022-05-13 | 石狮市汇星机械有限公司 | Heat treatment process method for producing knitting machine cam by using GCr15 steel |
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Application publication date: 20140924 |