CN102191359B - Wind power steel ball billet hot upsetting technology - Google Patents
Wind power steel ball billet hot upsetting technology Download PDFInfo
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- CN102191359B CN102191359B CN201010178888XA CN201010178888A CN102191359B CN 102191359 B CN102191359 B CN 102191359B CN 201010178888X A CN201010178888X A CN 201010178888XA CN 201010178888 A CN201010178888 A CN 201010178888A CN 102191359 B CN102191359 B CN 102191359B
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- ball
- ball base
- steel ball
- annealing
- technology
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a wind power steel ball billet hot upset forging technology. The technology comprises the following steps: a raw material is rapidly heated through middle frequency induction to 760 DEG C to soften the material, then the heated raw material performs automatic cutting and upsetting to form a ball billet, and the ball billet is finally used to prepare the finished product through ball annealing. The invention has the following advantages: in the technology, the raw material performs high temperature softening, then hot upset forging and forming are performed, finally ball annealing is performed, the hardness of the prepared ball billet is HRB88-94; and the annealing organization is in grade 2-4, the depth of the decarburization layer is less than 0.3mm, and the defects of hot rolling such as loose center and cavities of the ball billet can be overcome.
Description
Technical field
The present invention relates to a kind of manufacture craft of steel ball, be specifically related to a kind of employing thermal treatment process starting material are heated, and then make the technology of steel ball ball base; The steel ball ball base that this technology makes has the good characteristic of stability.
Background technology
At present, the wind-power electricity generation steel ball that domestic urgent need solves is the above big specification special-purpose steel ball of φ 30mm.Because steel ball size is big, if adopt traditional cold-heading molding mode to process the ball base, the one, high to equipment and mould requirement; The 2nd, ball base difficult quality guarantee is easy to generate cracking and other defective.And adopt large ball games hot-roll forming mode commonly used at present to process the ball base; Take place easily again heart portion loose with defective such as hole, have influence on work-ing life of steel ball, defectives such as 3% folded line, hole are arranged through statistics approximately; If starting material have loose situation, the ball base is also inevitable.High life and high reliability that this and wind-power electricity generation require are contrary.
Summary of the invention
Main task of the present invention is to provide a kind of wind-powered electricity generation steel ball ball base hot forging process, specifically be a kind of solution ball base heart portion loose with defective such as hole, reach and do not produce folded line, hole, and make and organize finer and close large-scale wind electricity steel ball ball base hot forging process.
In order to solve above technical problem; A kind of wind-powered electricity generation steel ball ball base hot forging process of the present invention; Said step is following: make material softening after earlier starting material being quickly heated up to 760 ℃ with Medium frequency induction; Then to the starting material after the heating shear automatically, upsetting pressure, form the ball base, carry out Spheroidizing Annealing at last and make finished product.
Further, said annealing process is an isothermal spheroidizing: after at first the ball base being heated to 790～800 ℃, be incubated 3.5 hours; Be cooled to 700～710 ℃ then rapidly; Be incubated 2.5 hours, with below the above-mentioned ball base furnace cooling to 500 ℃, the air cooling of coming out of the stove is to normal temperature again.
The invention has the advantages that: through this technology, earlier starting material are carried out hot mastication, hot then rammer moulding, Spheroidizing Annealing is again guaranteed prepared ball base hardness HRB88～94 at last; 2～4 grades of annealed structures, decarburized layer deepness is less than 0.3mm.Solved the existing ball base of hot rolling heart portion loose with defective such as hole.
Embodiment
This implementation of processes, specific as follows:
The high-carbon-chromium bearing steel that the first selection trade mark is GCr15 is as starting material; Make material softening after then starting material being quickly heated up to 760 ℃ with Medium frequency induction; Starting material after will heating are again sent into the large-scale automatic ball upsetting machine that model is EPMK35; The cutting mechanism of ball upsetting machine will be sheared starting material automatically, become to meet the cylindric segment of process stipulation length according to the trimming of production ball base, and the material after auto-feeder will be sheared is then delivered to rapidly in the upsetting pressure mould of automatic ball upsetting machine and carried out upsetting pressure; Form the ball base, carry out Spheroidizing Annealing at last and make.
Annealing process in this technology is an isothermal spheroidizing: after at first the ball base being heated to 790～800 ℃; Be incubated 3.5 hours, be cooled to 700～710 ℃ then rapidly, be incubated 2.5 hours; With below the above-mentioned ball base furnace cooling to 500 ℃, the air cooling of coming out of the stove is to normal temperature again.Index request after the annealing of ball base can reach following requirement: hardness HRB88～94; 2～4 grades of annealed structures, decarburized layer deepness is less than 0.3mm.
Embodiment 1
Present embodiment adopt the trade mark be the high-carbon-chromium bearing steel of GCr15 as raw material, the steel ball ball base performance that makes through above technology is following:
| Specification | Hardness | Annealed structure | Decarburized depth | Detection of defects |
| Steel ball φ 45.000 | HRB92 | 3 grades | 0.1mm | Do not find heart portion sedimentation and hole |
By last Biao Kede, adopt heat to upset and handle to reach hardness HRB92; Annealed structure is 3 grades, and decarburized layer deepness is 0.1mm, and does not have defectives such as heart portion sedimentation and hole.
Embodiment 2
Present embodiment adopt the trade mark be the high-carbon-chromium bearing steel of GCr15 as raw material, the steel ball ball base performance that makes through above technology is following:
| Specification | Hardness | Annealed structure | Decarburized depth | Detection of defects |
| Steel ball φ 40.000 | HRB92 | 3 grades | 0.1mm | Do not find heart portion sedimentation and hole |
By last Biao Kede: adopt heat to upset and handle to reach hardness HRB92; Annealed structure is 3 grades, and decarburized layer deepness is 0.1mm, and does not have defectives such as heart portion sedimentation and hole.
Embodiment 3
Present embodiment adopt the trade mark be the high-carbon-chromium bearing steel of GCr15 as raw material, the steel ball ball base performance that makes through above technology is following:
| Specification | Hardness | Annealed structure | Decarburized depth | Detection of defects |
| Steel ball φ 50.800 | HRB91 | 3 grades | 0.12mm | Do not find heart portion sedimentation and hole |
Can know by last table: adopt heat to upset and handle to reach hardness HRB91; Annealed structure is 3 grades, and decarburized layer deepness is 0.12mm, and does not have defectives such as heart portion sedimentation and hole.
Claims (1)
1. wind-powered electricity generation steel ball ball base hot forging process; It is characterized in that step is following: make material softening after earlier starting material being quickly heated up to 760 ℃ with Medium frequency induction, then to the starting material after the heating shear automatically, upsetting pressure; Form the ball base, carry out Spheroidizing Annealing at last and make finished product;
Said annealing process is an isothermal spheroidizing: after at first the ball base being heated to 790～800 ℃, be incubated 3.5 hours, be cooled to 700～710 ℃ then rapidly, be incubated 2.5 hours, with below the above-mentioned ball base furnace cooling to 500 ℃, the air cooling of coming out of the stove is to normal temperature again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010178888XA CN102191359B (en) | 2010-05-21 | 2010-05-21 | Wind power steel ball billet hot upsetting technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010178888XA CN102191359B (en) | 2010-05-21 | 2010-05-21 | Wind power steel ball billet hot upsetting technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102191359A CN102191359A (en) | 2011-09-21 |
| CN102191359B true CN102191359B (en) | 2012-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010178888XA Active CN102191359B (en) | 2010-05-21 | 2010-05-21 | Wind power steel ball billet hot upsetting technology |
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| CN (1) | CN102191359B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899475B (en) * | 2012-09-14 | 2014-06-11 | 上海钢球厂 | Steel ball for blower fan |
| CN106636579B (en) * | 2016-12-12 | 2018-07-31 | 常熟市龙腾滚动体制造有限公司 | A kind of production method of wind driven generator yaw pitch variable bearings bearing steel rolling element blank |
| CN109909812A (en) * | 2019-02-28 | 2019-06-21 | 江苏力星通用钢球股份有限公司 | A kind of big ball polishing process of wind-powered electricity generation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85101950A (en) * | 1985-04-01 | 1986-08-27 | 云南轴承厂 | High-carbon high-temperature low-alloy steel deformation carbide annealing process |
| CN101307799A (en) * | 2007-05-18 | 2008-11-19 | 上海钢球厂 | Blast engine steel ball |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005194570A (en) * | 2004-01-06 | 2005-07-21 | Sanyo Special Steel Co Ltd | Ring for high-strength bearing lace using seamless steel tube as material |
| JP2007308739A (en) * | 2006-05-16 | 2007-11-29 | Nsk Ltd | Method for manufacturing rolling bearing, and rolling bearing |
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2010
- 2010-05-21 CN CN201010178888XA patent/CN102191359B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85101950A (en) * | 1985-04-01 | 1986-08-27 | 云南轴承厂 | High-carbon high-temperature low-alloy steel deformation carbide annealing process |
| CN101307799A (en) * | 2007-05-18 | 2008-11-19 | 上海钢球厂 | Blast engine steel ball |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2005-194570A 2005.07.21 |
| JP特开2007-308739A 2007.11.29 |
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| CN102191359A (en) | 2011-09-21 |
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