CN103643200A - Composite carburization quenching technology for gear - Google Patents
Composite carburization quenching technology for gear Download PDFInfo
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- CN103643200A CN103643200A CN201310605580.2A CN201310605580A CN103643200A CN 103643200 A CN103643200 A CN 103643200A CN 201310605580 A CN201310605580 A CN 201310605580A CN 103643200 A CN103643200 A CN 103643200A
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Abstract
A disclosed composite carburization quenching technology for a gear comprises the following steps: 1) performing strong carburization; 2) performing diffusion; 3) cooing to 560-580 DEG C, staying at the constant temperature for 1-2 h and cooling; 4) quenching and heating, wherein the first-stage quenching temperature is 865-870 DEG C and the second-stage quenching temperature is 835-845 DEG C; and 5) tempering with a temperature of 260-265 DEG C. The provided composite carburization quenching technology for the gear is reduced in heat processing energy consumption and helps to improve the performances of heavy-duty gears.
Description
Technical field
The present invention relates to the compound carburizing quenching process of gear.
Background technology
Heavy-duty gear surging force is strong, carrying is large, security requirement is high, during use, except having good wear resisting property, also should have higher bending fatigue strength and contact fatigue strength, also will have higher overload-resistant and impact resistance.Traditional carburizing and quenching technique easily produces that stress is large, the defect of coarse grains and fragility, and the production cycle is long, consumes energy high, can not meet the performance requriements of key component.
Summary of the invention
The object of the present invention is to provide the compound carburizing quenching process of a kind of gear, it has reduced thermal treatment energy consumption, has improved the performance of heavy-duty gear.
For achieving the above object, technical scheme of the present invention is the compound carburizing quenching process of a kind of gear of design, comprises the steps:
1) ooze by force, drip methyl alcohol and kerosene, dripping speed is 170～180 droplets/minute, and carbon potential is at 1.25～1.3%cp, and furnace pressure remains on 25～30Pa, keeps 60～65 minutes, and carburized depth reaches 0.03～0.04 millimeter;
2) diffusion, drips methyl alcohol and kerosene, and dripping speed is 165～170 droplets/minute, and carbon potential is at 1.1～1.5%cp, and furnace pressure remains on 25～28Pa, keeps 40～45 minutes, and carburized depth reaches 0.05～0.06 millimeter;
3) cooling, when temperature is down to 560～580 ℃, isothermal holding is cooling after 1～2 hour;
4) quench and heat, the quenching temperature of first stage is 865～870 ℃, and the quenching temperature of subordinate phase is 835～845 ℃;
5) tempering, tempering temperature is 260～265 ℃.
Advantage of the present invention and beneficial effect are: provide a kind of gear compound carburizing quenching process, it has reduced thermal treatment energy consumption, has improved the performance of heavy-duty gear.
The present invention by carburizing, etc. gentleness quench and to combine, not only reduced thermal treatment energy consumption, shortened the process time, optimized energy saving technology, and effectively improved the heat treated all technical of Carburizing in Heavy-duty Gears as fatigue strength, wear resistance, surface hardness, heart portion obdurability.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
The concrete technical scheme of implementing of the present invention is:
Embodiment 1
The compound carburizing quenching process of gear, comprises the steps:
1) ooze by force, drip methyl alcohol and kerosene, dripping speed is 170 droplets/minute, and carbon potential is at 1.25cp, and furnace pressure remains on 25Pa, keeps 60 minutes, and carburized depth reaches 0.03 millimeter;
2) diffusion, drips methyl alcohol and kerosene, and dripping speed is 165 droplets/minute, and carbon potential is at 1.1%cp, and furnace pressure remains on 25Pa, keeps 40 minutes, and carburized depth reaches 0.05 millimeter;
3) cooling, when temperature is down to 560 ℃, isothermal holding is cooling after 1 hour;
4) quench and heat, the quenching temperature of first stage is 865 ℃, and the quenching temperature of subordinate phase is 835 ℃;
5) tempering, tempering temperature is 260 ℃.
Embodiment 2
The compound carburizing quenching process of gear, comprises the steps:
1) ooze by force, drip methyl alcohol and kerosene, dripping speed is 176 droplets/minute, and carbon potential is at 1.28%cp, and furnace pressure remains on 27Pa, keeps 63 minutes, and carburized depth reaches 0.035 millimeter;
2) diffusion, drips methyl alcohol and kerosene, and dripping speed is 168 droplets/minute, and carbon potential is at 1.3%cp, and furnace pressure remains on 26Pa, keeps 44 minutes, and carburized depth reaches 0.054 millimeter;
3) cooling, when temperature is down to 570 ℃, isothermal holding is cooling after 1.5 hours;
4) quench and heat, the quenching temperature of first stage is 866 ℃, and the quenching temperature of subordinate phase is 838 ℃;
5) tempering, tempering temperature is 262 ℃.
Embodiment 3
The compound carburizing quenching process of gear, comprises the steps:
1) ooze by force, drip methyl alcohol and kerosene, dripping speed is 180 droplets/minute, and carbon potential is at 1.3%cp, and furnace pressure remains on 30Pa, keeps 65 minutes, and carburized depth reaches 0.04 millimeter;
2) diffusion, drips methyl alcohol and kerosene, and dripping speed is 170 droplets/minute, and carbon potential is at 1.5%cp, and furnace pressure remains on 28Pa, keeps 45 minutes, and carburized depth reaches 0.06 millimeter;
3) cooling, when temperature is down to 580 ℃, isothermal holding is cooling after 2 hours;
4) quench and heat, the quenching temperature of first stage is 870 ℃, and the quenching temperature of subordinate phase is 845 ℃;
5) tempering, tempering temperature is 265 ℃.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (1)
1. the compound carburizing quenching process of gear, is characterized in that, comprises the steps:
1) ooze by force, drip methyl alcohol and kerosene, dripping speed is 170～180 droplets/minute, and carbon potential is at 1.25～1.3%cp, and furnace pressure remains on 25～30Pa, keeps 60～65 minutes, and carburized depth reaches 0.03～0.04 millimeter;
2) diffusion, drips methyl alcohol and kerosene, and dripping speed is 165～170 droplets/minute, and carbon potential is at 1.1～1.5%cp, and furnace pressure remains on 25～28Pa, keeps 40～45 minutes, and carburized depth reaches 0.05～0.06 millimeter;
3) cooling, when temperature is down to 560～580 ℃, isothermal holding is cooling after 1～2 hour;
4) quench and heat, the quenching temperature of first stage is 865～870 ℃, and the quenching temperature of subordinate phase is 835～845 ℃;
5) tempering, tempering temperature is 260～265 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310605580.2A CN103643200A (en) | 2013-11-26 | 2013-11-26 | Composite carburization quenching technology for gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310605580.2A CN103643200A (en) | 2013-11-26 | 2013-11-26 | Composite carburization quenching technology for gear |
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| Publication Number | Publication Date |
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| CN103643200A true CN103643200A (en) | 2014-03-19 |
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| CN201310605580.2A Pending CN103643200A (en) | 2013-11-26 | 2013-11-26 | Composite carburization quenching technology for gear |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128773A (en) * | 2014-07-24 | 2014-11-05 | 成都亨通兆业精密机械有限公司 | Gear production process beneficial to improving production efficiency |
| CN107177724A (en) * | 2016-03-09 | 2017-09-19 | 天津建筑机械厂 | Heavy load carburized parts composite heating quenching technical |
| CN111468910A (en) * | 2020-05-29 | 2020-07-31 | 全椒县众联机械有限公司 | Antirust processing technology of cylindrical gear |
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| CN1421541A (en) * | 2001-11-29 | 2003-06-04 | Ntn株式会社 | Bearing parts, Heat treatment method of bearing parts and rolling bearing |
| JP2005048270A (en) * | 2003-07-31 | 2005-02-24 | Kobe Steel Ltd | Method of producing surface hardened component, and surface hardened component |
| CN101265582A (en) * | 2008-04-30 | 2008-09-17 | 上海热处理厂有限公司 | 20CrMnMo energy-saving carburizing composite heat treating process |
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| CN102373400A (en) * | 2011-10-25 | 2012-03-14 | 哈尔滨汇隆汽车箱桥有限公司 | Heat treatment method of spiral bevel gear of cargo truck on double-row rare earth carburization equipment |
| CN102392260A (en) * | 2011-10-11 | 2012-03-28 | 天津市祥威传动设备有限公司 | Carburizing direct quenching process for large-scale wind power gear/gear shaft |
| CN102703909A (en) * | 2012-05-24 | 2012-10-03 | 浙江吉利汽车研究院有限公司杭州分公司 | Combined carburizing and quenching process for improving gear performance |
| CN102912283A (en) * | 2012-10-15 | 2013-02-06 | 常州市新城光大热处理有限公司 | High-temperature variable-carbon potential quick carburizing treatment process for gear parts |
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2013
- 2013-11-26 CN CN201310605580.2A patent/CN103643200A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1421541A (en) * | 2001-11-29 | 2003-06-04 | Ntn株式会社 | Bearing parts, Heat treatment method of bearing parts and rolling bearing |
| JP2005048270A (en) * | 2003-07-31 | 2005-02-24 | Kobe Steel Ltd | Method of producing surface hardened component, and surface hardened component |
| CN101265582A (en) * | 2008-04-30 | 2008-09-17 | 上海热处理厂有限公司 | 20CrMnMo energy-saving carburizing composite heat treating process |
| CN101984139A (en) * | 2010-11-30 | 2011-03-09 | 江苏丰东热技术股份有限公司 | Carburizing method for wind power gear used for wind power generation |
| CN102191364A (en) * | 2011-05-25 | 2011-09-21 | 浙江浦江齿轮有限公司 | Carburizing and quenching process for gear made of alloy steel |
| CN102392260A (en) * | 2011-10-11 | 2012-03-28 | 天津市祥威传动设备有限公司 | Carburizing direct quenching process for large-scale wind power gear/gear shaft |
| CN102373400A (en) * | 2011-10-25 | 2012-03-14 | 哈尔滨汇隆汽车箱桥有限公司 | Heat treatment method of spiral bevel gear of cargo truck on double-row rare earth carburization equipment |
| CN102703909A (en) * | 2012-05-24 | 2012-10-03 | 浙江吉利汽车研究院有限公司杭州分公司 | Combined carburizing and quenching process for improving gear performance |
| CN102912283A (en) * | 2012-10-15 | 2013-02-06 | 常州市新城光大热处理有限公司 | High-temperature variable-carbon potential quick carburizing treatment process for gear parts |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128773A (en) * | 2014-07-24 | 2014-11-05 | 成都亨通兆业精密机械有限公司 | Gear production process beneficial to improving production efficiency |
| CN107177724A (en) * | 2016-03-09 | 2017-09-19 | 天津建筑机械厂 | Heavy load carburized parts composite heating quenching technical |
| CN111468910A (en) * | 2020-05-29 | 2020-07-31 | 全椒县众联机械有限公司 | Antirust processing technology of cylindrical gear |
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Application publication date: 20140319 |