CN103643241A - Gear carburization quenching technology - Google Patents
Gear carburization quenching technology Download PDFInfo
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- CN103643241A CN103643241A CN201310605530.4A CN201310605530A CN103643241A CN 103643241 A CN103643241 A CN 103643241A CN 201310605530 A CN201310605530 A CN 201310605530A CN 103643241 A CN103643241 A CN 103643241A
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Abstract
A disclosed gear carburization quenching technology comprises the following steps: 1) carburizing with a temperature of 830-840 DEG C; 2) performing pre-cooling on a gear to 730-740 DEG C and keeping the temperature for 2-3 h; 3) performing primary quenching, immersing the gear into quenching oil, keeping the temperature at 110-120 DEG C, and stirring the quenching oil; 4) cleaning the gear with gasoline; 5) performing high tempering, heating the gear to 720-730 DEG C, keeping the temperature for 2-3 h, performing high tempering within 1 hour after primary quenching; 6) performing preheating on the gear to 730-740 DEG C, and keeping the temperature for 2-3 h; 7) performing secondary quenching, immersing the gear into quenching oil, keeping the temperature at 125-130 DEG C, and stirring the quenching oil; 8) cleaning the gear with gasoline; and 9) performing low tempering, heating the gear to 160-170 DEG C, keeping the temperature for 2-3 h, and performing low tempering within 1 hour of the secondary quenching. The provided gear carburization quenching technology helps to reduce the residual austenite content and the non-martensite layer thickness on the gear surface.
Description
Technical field
The present invention relates to gear carburizing quenching process.
Background technology
Existing carburizing quenching process is commonly used as after carburizing precooling, direct quenching, but in the rear infiltration layer that quenches, remained austenite content is higher, and especially for essential coarse-grained steel, surface easily forms carbide network, and surface hardness is difficult to reach technical requirements.Also having a kind of carburizing quenching process is primary quenching after the cold sky of carburizing, and performance makes moderate progress, but is still difficult to meet technical requirements for the higher key components and parts of mechanical property requirements.Conventionally adopt roll flute after carburizing and quenching, but roll flute can change into pressure by stress for this reason, unfavorable to the mechanical property of workpiece; Or carry out shot peening strengthening, but this stress decays in high speed rotating heat-dissipating, affects its mechanical property.
Summary of the invention
The object of the present invention is to provide a kind of gear carburizing quenching process, gear surface residual austenite content and non-martensite layer thickness are reduced.
For achieving the above object, technical scheme of the present invention is a kind of gear carburizing quenching process of design, comprises the steps:
1) carburizing, carburizing temperature is 830-840 ℃;
2) precooling, is chilled to 730-740 ℃ in advance by gear, insulation 2-3 hour;
3) primary quenching, by gear dip quench oil, temperature remains on 110-120 ℃, and stirs quenching oil;
4) clean, with gasoline, gear is cleaned;
5) high tempering, is heated to 720-730 ℃ by gear, and is incubated 2-3 hour, and high tempering carries out within an hour after primary quenching;
6) preheating, is preheated to 730-740 ℃ by gear, insulation 2-3 hour;
7) secondary quenching, by gear dip quench oil, temperature remains on 125-130 ℃, and stirs quenching oil;
8) clean, with gasoline, gear is cleaned;
9) low-temperaturetempering, is heated to 160-170 ℃ by gear, and is incubated 2-3 hour, and high tempering carries out within an hour after secondary quenching.
Advantage of the present invention and beneficial effect are: a kind of gear carburizing quenching process is provided, gear surface residual austenite content and non-martensite layer thickness are reduced.
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
A gear carburizing quenching process, comprises the steps:
1) carburizing, carburizing temperature is 840 ℃;
2) precooling, is chilled to 740 ℃ in advance by gear, is incubated 3 hours;
3) primary quenching, by gear dip quench oil, temperature remains on 120 ℃, and stirs quenching oil;
4) clean, with gasoline, gear is cleaned;
5) high tempering, is heated to 730 ℃ by gear, and is incubated 3 hours, and high tempering carries out within an hour after primary quenching;
6) preheating, is preheated to 740 ℃ by gear, is incubated 3 hours;
7) secondary quenching, by gear dip quench oil, temperature remains on 130 ℃, and stirs quenching oil;
8) clean, with gasoline, gear is cleaned;
9) low-temperaturetempering, is heated to 170 ℃ by gear, and is incubated 3 hours, and high tempering carries out within an hour after secondary quenching.
Embodiment 2
A gear carburizing quenching process, comprises the steps:
1) carburizing, carburizing temperature is 830 ℃;
2) precooling, is chilled to 730 ℃ in advance by gear, is incubated 2 hours;
3) primary quenching, by gear dip quench oil, temperature remains on 110 ℃, and stirs quenching oil;
4) clean, with gasoline, gear is cleaned;
5) high tempering, is heated to 720 ℃ by gear, and is incubated 2 hours, and high tempering carries out within an hour after primary quenching;
6) preheating, is preheated to 730 ℃ by gear, is incubated 2 hours;
7) secondary quenching, by gear dip quench oil, temperature remains on 125 ℃, and stirs quenching oil;
8) clean, with gasoline, gear is cleaned;
9) low-temperaturetempering, is heated to 160 ℃ by gear, and is incubated 2 hours, and high tempering carries out within an hour after secondary quenching.
Embodiment 3
A gear carburizing quenching process, comprises the steps:
1) carburizing, carburizing temperature is 833 ℃;
2) precooling, is chilled to 736 ℃ in advance by gear, is incubated 2.5 hours;
3) primary quenching, by gear dip quench oil, temperature remains on 118 ℃, and stirs quenching oil;
4) clean, with gasoline, gear is cleaned;
5) high tempering, is heated to 725 ℃ by gear, and is incubated 2.5 hours, and high tempering carries out within an hour after primary quenching;
6) preheating, is preheated to 737 ℃ by gear, is incubated 2.5 hours;
7) secondary quenching, by gear dip quench oil, temperature remains on 127 ℃, and stirs quenching oil;
8) clean, with gasoline, gear is cleaned;
9) low-temperaturetempering, is heated to 162 ℃ by gear, and is incubated 2.5 hours, and high tempering carries out within an hour after secondary quenching.
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. gear carburizing quenching process, is characterized in that, comprises the steps:
1) carburizing, carburizing temperature is 830-840 ℃;
2) precooling, is chilled to 730-740 ℃ in advance by gear, insulation 2-3 hour;
3) primary quenching, by gear dip quench oil, temperature remains on 110-120 ℃, and stirs quenching oil;
4) clean, with gasoline, gear is cleaned;
5) high tempering, is heated to 720-730 ℃ by gear, and is incubated 2-3 hour, and high tempering carries out within an hour after primary quenching;
6) preheating, is preheated to 730-740 ℃ by gear, insulation 2-3 hour;
7) secondary quenching, by gear dip quench oil, temperature remains on 125-130 ℃, and stirs quenching oil;
8) clean, with gasoline, gear is cleaned;
9) low-temperaturetempering, is heated to 160-170 ℃ by gear, and is incubated 2-3 hour, and high tempering carries out within an hour after secondary quenching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310605530.4A CN103643241A (en) | 2013-11-26 | 2013-11-26 | Gear carburization quenching technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310605530.4A CN103643241A (en) | 2013-11-26 | 2013-11-26 | Gear carburization quenching technology |
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| CN103643241A true CN103643241A (en) | 2014-03-19 |
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| CN201310605530.4A Pending CN103643241A (en) | 2013-11-26 | 2013-11-26 | Gear carburization quenching technology |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104404226A (en) * | 2014-12-27 | 2015-03-11 | 王文姣 | Thermal treatment method for gear |
| CN104451438A (en) * | 2014-12-27 | 2015-03-25 | 王文姣 | Production method of high-strength gear |
| CN104805271A (en) * | 2015-04-28 | 2015-07-29 | 柳州科尔特锻造机械有限公司 | Heat treatment process for automobile gears |
| CN104805266A (en) * | 2015-04-28 | 2015-07-29 | 柳州科尔特锻造机械有限公司 | Carburizing and quenching process for heavy-load gears |
| CN104831291A (en) * | 2015-05-11 | 2015-08-12 | 吴芳吉 | Carburization process for automobile hub |
| CN104831022A (en) * | 2015-05-11 | 2015-08-12 | 吴芳吉 | Gear carburizing process |
| CN104894573A (en) * | 2015-05-11 | 2015-09-09 | 柳州金盾机械有限公司 | Method for carburizing and quenching of cylindrical gear |
| CN105219927A (en) * | 2014-08-14 | 2016-01-06 | 苏州优金金属成型科技有限公司 | A kind of automobile overlikon spiral bevel gear forging process |
| CN105238911A (en) * | 2015-11-16 | 2016-01-13 | 南车戚墅堰机车车辆工艺研究所有限公司 | Steel grain refining heat treatment method for heavy-load locomotive gear |
| CN108179250A (en) * | 2017-12-29 | 2018-06-19 | 重庆全茂合渝科技有限公司 | A kind of high intensity chain wheel of motorcycle quenching technical |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605378A (en) * | 2012-01-13 | 2012-07-25 | 浙江吉利汽车研究院有限公司 | Carburizing and quenching method |
-
2013
- 2013-11-26 CN CN201310605530.4A patent/CN103643241A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605378A (en) * | 2012-01-13 | 2012-07-25 | 浙江吉利汽车研究院有限公司 | Carburizing and quenching method |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105219927A (en) * | 2014-08-14 | 2016-01-06 | 苏州优金金属成型科技有限公司 | A kind of automobile overlikon spiral bevel gear forging process |
| CN104404226A (en) * | 2014-12-27 | 2015-03-11 | 王文姣 | Thermal treatment method for gear |
| CN104451438A (en) * | 2014-12-27 | 2015-03-25 | 王文姣 | Production method of high-strength gear |
| CN104404226B (en) * | 2014-12-27 | 2016-04-20 | 北京金恒博远冶金技术发展有限公司 | A kind of heat treating method of gear |
| CN104805271A (en) * | 2015-04-28 | 2015-07-29 | 柳州科尔特锻造机械有限公司 | Heat treatment process for automobile gears |
| CN104805266A (en) * | 2015-04-28 | 2015-07-29 | 柳州科尔特锻造机械有限公司 | Carburizing and quenching process for heavy-load gears |
| CN104831291A (en) * | 2015-05-11 | 2015-08-12 | 吴芳吉 | Carburization process for automobile hub |
| CN104831022A (en) * | 2015-05-11 | 2015-08-12 | 吴芳吉 | Gear carburizing process |
| CN104894573A (en) * | 2015-05-11 | 2015-09-09 | 柳州金盾机械有限公司 | Method for carburizing and quenching of cylindrical gear |
| CN105238911A (en) * | 2015-11-16 | 2016-01-13 | 南车戚墅堰机车车辆工艺研究所有限公司 | Steel grain refining heat treatment method for heavy-load locomotive gear |
| CN108179250A (en) * | 2017-12-29 | 2018-06-19 | 重庆全茂合渝科技有限公司 | A kind of high intensity chain wheel of motorcycle quenching technical |
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Application publication date: 20140319 |