CN104404534A - Heat treatment process for bearing ring cold extrusion mould - Google Patents
Heat treatment process for bearing ring cold extrusion mould Download PDFInfo
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- CN104404534A CN104404534A CN201410712703.7A CN201410712703A CN104404534A CN 104404534 A CN104404534 A CN 104404534A CN 201410712703 A CN201410712703 A CN 201410712703A CN 104404534 A CN104404534 A CN 104404534A
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Abstract
The invention relates to a heat treatment process for a bearing ring cold extrusion mould. The heat treatment process is characterized by comprising the following steps: 1) forging: upsetting a steel billet for 6-10 times, drawing and forging, wherein the total forging ratio is 3; 2) annealing; 3) quenching; 4) tempering twice; 5) performing salt bath nitriding surface treatment. The heat treatment process for the bearing ring cold extrusion mould is reasonable in process design; by the heat treatment process, mechanical properties of a steel material are effectively improved, the steel material has an average using frequency about 10000 times, the service life of the mould is prolonged, and the production cost of a bearing is reduced.
Description
Technical field
The present invention relates to a kind of mould processing technology, especially relate to a kind of bearing ring cold extrusion die thermal treatment process.
Background technology
W6Mo5Cr4V2 rapid tool steel has high rigidity, high-wearing feature, high thermohardening, high-hardenability and enough plasticity and toughness, and have good casting, forging, weldering and machining property, thus it occupies and consequence in tool steel, be widely used in manufacturing high-strength toughness cold working mould, some bearing ring cold extrusion dies also adopt this kind of steel manufacture.Bearing ring cold extrusion die frequently bears the effect of the large stress such as compression, impact, friction at work, easily there is the phenomenons such as cracking, wearing and tearing in mould, wherein common with Cracking Failure phenomenon, thus make mould invalidation, the average access times of bearing ring cold extrusion die are at about 5000 ~ 6000 times, work-ing life is shorter, thus increases the production cost of bearing.
Summary of the invention
The applicant, for above-mentioned problem, is studied improvement, provides a kind of bearing ring cold extrusion die thermal treatment process, appropriate design thermal treatment process flow process, effective mechanical property improving steel, extends the mold use life-span, reduces the production cost of bearing.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of bearing ring cold extrusion die thermal treatment process, comprises the following steps:
1) forge, carry out 6 ~ 10 jumping-ups, pullings to W6M o5Cr4V2 steel billet material and forge, Forge Heating temperature 1100 ~ 1150 ° of C, initial forging temperature 1080 ~ 1130 ° of C, final forging temperature 800 ~ 900 ° of C, total forging ratio is 3;
2) anneal, be heated to 900 ° of C, be incubated 1 ~ 3 hour; Stove is chilled to 700 ~ 750 ° of C, is incubated 2 ~ 3 hours; Stove cooling rate rate≤40 ° C/hour, to come out of the stove air cooling lower than 500 ° of C;
3) quench, 800 ~ 850 ° of C preheatings, are incubated 15 ~ 20 seconds/millimeter; Be heated to 1100 ~ 1150 ° of C, be incubated 10 ~ 15 seconds/millimeter; Stove is chilled to 660 ° of C, is incubated 8 ~ 10 seconds/millimeter; To come out of the stove air cooling lower than 500 ° of C;
4) tempering 2 times, tempering temperature 350 ° of C, air cooling 2 ~ 3 hours; Temper number 64HRC;
5) salt bath nitriding surface treatment, temperature 520 ~ 580 ° of C, 20 ~ 30 hours air coolings, nitriding depth 0. 2 ~ 0. 3 millimeters.
Further:
Comprise the following steps:
1) forge, carry out 8 jumping-ups, pullings to W6M o5Cr4V2 steel billet material and forge, Forge Heating temperature 1130 ° of C, initial forging temperature 1100 ° of C, final forging temperature 850 ° of C, total forging ratio is 3;
2) anneal, be heated to 900 ° of C, be incubated 2 hours; Stove is chilled to 730 ° of C, is incubated 3 hours; Stove cooling rate rate≤40 ° C/hour, to come out of the stove air cooling lower than 500 ° of C;
3) quench, 820 ° of C preheatings, are incubated 18 seconds/millimeter; Be heated to 1120 ° of C, be incubated 12 seconds/millimeter; Stove is chilled to 660 ° of C, is incubated 10 seconds/millimeter; To come out of the stove air cooling lower than 500 ° of C;
4) tempering 2 times, tempering temperature 320 ~ 380 ° of C, air cooling 2 ~ 3 hours; Temper number 64HRC;
5) salt bath nitriding surface treatment, temperature 550 ° of C, 25 hours air coolings, nitriding depth 0. 2 ~ 0. 3 millimeters.
Technique effect of the present invention is:
A kind of bearing ring cold extrusion die thermal treatment process disclosed by the invention, thermal treatment process flow scheme design is reasonable, effectively improves the mechanical property of steel, and average access times, at about 10000 times, extend the mold use life-span, reduce the production cost of bearing.
Embodiment
Below the specific embodiment of the present invention is described in further detail.
Embodiment 1,
Comprise the following steps:
1) forge, carry out 8 jumping-ups, pullings to W6M o5Cr4V2 steel billet material and forge, Forge Heating temperature 1130 ° of C, initial forging temperature 1100 ° of C, final forging temperature 850 ° of C, total forging ratio is 3;
2) anneal, be heated to 900 ° of C, be incubated 2 hours; Stove is chilled to 730 ° of C, is incubated 3 hours; Stove cooling rate rate≤40 ° C/hour, to come out of the stove air cooling lower than 500 ° of C;
3) quench, 820 ° of C preheatings, are incubated 18 seconds/millimeter; Be heated to 1120 ° of C, be incubated 12 seconds/millimeter; Stove is chilled to 660 ° of C, is incubated 10 seconds/millimeter; To come out of the stove air cooling lower than 500 ° of C;
4) tempering 2 times, tempering temperature 350 ° of C, air cooling 2 ~ 3 hours; Temper number 64HRC;
5) salt bath nitriding surface treatment, temperature 550 ° of C, 25 hours air coolings, nitriding depth 0. 2 ~ 0. 3 millimeters.
Embodiment 2,
Comprise the following steps:
1) forge, carry out 6 jumping-ups, pullings to W6M o5Cr4V2 steel billet material and forge, Forge Heating temperature 1150 ° of C, initial forging temperature 1130 ° of C, final forging temperature 900 ° of C, total forging ratio is 3;
2) anneal, be heated to 900 ° of C, be incubated 3 hours; Stove is chilled to 700C, is incubated 3 hours; Stove cooling rate rate≤40 ° C/hour, to come out of the stove air cooling lower than 500 ° of C;
3) quench, 850 ° of C preheatings, are incubated 20 seconds/millimeter; Be heated to 1150 ° of C, be incubated 15 seconds/millimeter; Stove is chilled to 660 ° of C, is incubated 10 seconds/millimeter; To come out of the stove air cooling lower than 500 ° of C;
4) tempering 2 times, tempering temperature 380 ° of C, air cooling 3 hours; Temper number 64HRC;
5) salt bath nitriding surface treatment, temperature 580 ° of C, 30 hours air coolings, nitriding depth 0. 2 ~ 0. 3 millimeters.
Claims (2)
1. a bearing ring cold extrusion die thermal treatment process, is characterized in that comprising the following steps:
1) forge, carry out 6 ~ 10 jumping-ups, pullings to W6M o5Cr4V2 steel billet material and forge, Forge Heating temperature 1100 ~ 1150 ° of C, initial forging temperature 1080 ~ 1130 ° of C, final forging temperature 800 ~ 900 ° of C, total forging ratio is 3;
2) anneal, be heated to 900 ° of C, be incubated 1 ~ 3 hour; Stove is chilled to 700 ~ 750 ° of C, is incubated 2 ~ 3 hours; Stove cooling rate rate≤40 ° C/hour, to come out of the stove air cooling lower than 500 ° of C;
3) quench, 800 ~ 850 ° of C preheatings, are incubated 15 ~ 20 seconds/millimeter; Be heated to 1100 ~ 1150 ° of C, be incubated 10 ~ 15 seconds/millimeter; Stove is chilled to 660 ° of C, is incubated 8 ~ 10 seconds/millimeter; To come out of the stove air cooling lower than 500 ° of C;
4) tempering 2 times, tempering temperature 350 ° of C, air cooling 2 ~ 3 hours; Temper number 64HRC;
5) salt bath nitriding surface treatment, temperature 520 ~ 580 ° of C, 20 ~ 30 hours air coolings, nitriding depth 0. 2 ~ 0. 3 millimeters.
2., according to bearing ring cold extrusion die thermal treatment process according to claim 1, it is characterized in that comprising the following steps:
1) forge, carry out 8 jumping-ups, pullings to W6M o5Cr4V2 steel billet material and forge, Forge Heating temperature 1130 ° of C, initial forging temperature 1100 ° of C, final forging temperature 850 ° of C, total forging ratio is 3;
2) anneal, be heated to 900 ° of C, be incubated 2 hours; Stove is chilled to 730 ° of C, is incubated 3 hours; Stove cooling rate rate≤40 ° C/hour, to come out of the stove air cooling lower than 500 ° of C;
3) quench, 820 ° of C preheatings, are incubated 18 seconds/millimeter; Be heated to 1120 ° of C, be incubated 12 seconds/millimeter; Stove is chilled to 660 ° of C, is incubated 10 seconds/millimeter; To come out of the stove air cooling lower than 500 ° of C;
4) tempering 2 times, tempering temperature 320 ~ 380 ° of C, air cooling 2 ~ 3 hours; Temper number 64HRC;
5) salt bath nitriding surface treatment, temperature 550 ° of C, 25 hours air coolings, nitriding depth 0. 2 ~ 0. 3 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712703.7A CN104404534A (en) | 2014-12-02 | 2014-12-02 | Heat treatment process for bearing ring cold extrusion mould |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410712703.7A CN104404534A (en) | 2014-12-02 | 2014-12-02 | Heat treatment process for bearing ring cold extrusion mould |
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| CN104404534A true CN104404534A (en) | 2015-03-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364433A (en) * | 2015-11-27 | 2016-03-02 | 昆山惠众机电有限公司 | Hot-working die production technology |
| CN105886730A (en) * | 2016-04-28 | 2016-08-24 | 太仓市沪太热处理厂 | Heat treatment technology of precise complicated mold |
| CN106001379A (en) * | 2016-05-23 | 2016-10-12 | 辽宁银捷装备科技股份有限公司 | Forging process for bearing rings made of M50 steel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745780A (en) * | 2008-12-10 | 2010-06-23 | 上海工程技术大学 | Method for manufacturing large-wire-diameter steel wire feed chute plates |
-
2014
- 2014-12-02 CN CN201410712703.7A patent/CN104404534A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745780A (en) * | 2008-12-10 | 2010-06-23 | 上海工程技术大学 | Method for manufacturing large-wire-diameter steel wire feed chute plates |
Non-Patent Citations (1)
| Title |
|---|
| 刘静安: "4Cr5MoV1Si(H13)热作模具钢的工艺性能和热处理特定", 《重庆汽车摩托车、焊接、涂装学术研讨会文集》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364433A (en) * | 2015-11-27 | 2016-03-02 | 昆山惠众机电有限公司 | Hot-working die production technology |
| CN105886730A (en) * | 2016-04-28 | 2016-08-24 | 太仓市沪太热处理厂 | Heat treatment technology of precise complicated mold |
| CN106001379A (en) * | 2016-05-23 | 2016-10-12 | 辽宁银捷装备科技股份有限公司 | Forging process for bearing rings made of M50 steel |
| CN106001379B (en) * | 2016-05-23 | 2019-02-22 | 辽宁银捷装备科技股份有限公司 | M50 steel bearings lasso process for forging |
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Application publication date: 20150311 |