CN103993154A - Thermal treatment method of alloy steel gear - Google Patents
Thermal treatment method of alloy steel gear Download PDFInfo
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- CN103993154A CN103993154A CN201410250478.XA CN201410250478A CN103993154A CN 103993154 A CN103993154 A CN 103993154A CN 201410250478 A CN201410250478 A CN 201410250478A CN 103993154 A CN103993154 A CN 103993154A
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Abstract
The invention provides a thermal treatment method of an alloy steel gear. The alloy steel gear is subjected to thermal treatment at a controlled atmosphere by using a carbonitriding method, and the thermal treatment process comprises the steps of carbonitriding, quenching and tempering, i.e., the alloy steel gear is placed into a controlled atmosphere device and is treated according to the following steps of: (1) heating by exhaust gases; (2) strong osmotic treatment; (3) diffusion; (4) cooling treatment; (5) temperature balancing treatment; (6) oil quenching treatment; (7) tempering and heating treatment; (8) finally, air cooling to room temperature to obtain the alloy steel gear. The invention provides the carbonitriding controlled atmosphere heat treatment method which is safe, practical, easy to operate and capable of effectively controlling workpiece deformation and improving machining precision according to defects in surface thermal treatment of the traditional 20CrMnTi gear.
Description
technical field:
The present invention relates to a kind of heat-treatment technology method of gear, particularly a kind of heat treating method of steel alloy gear.
background technology:
Gear is one of component of most critical in wheel box actuator, the effect of the load that withstands shocks in transmission process, and also in engaged transmission process, the flank of tooth easily produces tired spot corrosion.Along with wheel box is more and more higher to the requirement such as transmission stability, noise, to the complete processing of gear, particularly thermal treatment process is also had higher requirement.Low-carbon alloy steel 20CrMnTi has good machinability, can obtain high tooth face hardness and there are enough toughness and higher counter-bending fatigue strength in heart portion by surface cementation after processing.High and the long service life of the gear capacity of 20CrMnTi material.But carry out carburizing thermal treatment by traditional at pit gas carburizing furnace, gear inevitably can produce distortion.Although and carburizing treatment can make gear surface obtain high carbon concentration, after quenching and temper, can improve surface hardness, wear resistance and fatigue resistance, but because carburizing is temperature required higher, austenite crystal is thick, residual austenite is more, causes gear wear resistance to reduce, and is out of shape larger.
summary of the invention:
The present invention is to provide a kind of heat treating method of steel alloy gear, it is according to the deficiency in the thermal treatment of existing 20CrMnTi gear surface, a kind of safe and applicable, easy handling are provided, can effectively control workpiece deformation, improve the carbonitriding Atmosphere controlling heat-treatment processing method of its working accuracy.
The heat treating method of a kind of steel alloy gear of the present invention, to adopt carbonitriding under atmospheric condition, heat-treating steel alloy gear, comprise carbonitriding, quenching, tempering process, its be by steel alloy gear after cleaning, drying, be placed in controlled atmosphere device and process as follows:
1) exhaust is heated to 840-860 DEG C, and constant temperature keeps 40-50 min, and controlling the carbon potential in device during this is 0.95-1.05%;
2) ooze by force processing, ooze by force time 300min, control during this in device carbon potential at 0.95-1.05%;
3) diffusion phase, diffusion time, 55-65min, controlled during this in device carbon potential at 0.75-0.85%;
4) cooling is processed, and is cooled to 810-830 DEG C, controls during this in device carbon potential at 0.75-0.85%;
5) samming processing, samming time 55-65min, controls during this in device carbon potential at 0.75-0.85%;
6) oil quenching processing, oil quenching temperature is 100-120 DEG C, controls during this in device carbon potential at 0.75-0.85%;
7) tempering heat treated, tempering is heated to 160-180 DEG C, soaking time 150-180min;
8) last air cooling, to room temperature, obtains product.
The heat treating method of steel alloy gear of the present invention, described controlled atmosphere is the nitrogen-based atmosphere being made into by nitrogen, methyl alcohol, ammonia, propane.
Carbonitriding of the present invention, quenching, tempering process are all to complete in controlled atmosphere generator.
The heat treating method of steel alloy gear of the present invention, described in it, steel alloy gear is low-carbon alloy steel gear; Particularly preferred low-carbon alloy steel 20CrMnTi gear.
Air cooling of the present invention is nature or air-cooled cooling in air.
The present invention is through above-mentioned each step, carbonitriding, quenching Atmosphere controlling heat-treatment to part are completed, because carbonitriding temperature is lower, Grain growth trend is little, after quenching, obtain martensite containing nitrogen, residual austenite and carboritride, crystal grain is tiny, be out of shape little, and the martensite containing nitrogen that gear part after heat treatment obtains and a small amount of nitride wear resistance are better than carburized structure, its core structure is low carbon martensite and ferrite simultaneously, can ensure that workpiece heart portion has higher intensity and impelling strength.Utilize after tested the surface hardness of low-carbon alloy steel gear part prepared by the inventive method can reach HRC58-62, depth of penetration is at 0.8-0.9mm.
Controlled atmosphere of the present invention is the nitrogen-based atmosphere being made in proportion by nitrogen, methyl alcohol, ammonia, propane, and nitrogen has been mainly protection against oxidation effect.
In the present invention, a certain proportion of nitrogen, methyl alcohol, ammonia, propane are passed in controlled atmosphere generator to the at high temperature fission reaction of methyl alcohol, propane, the nitrogen-based atmosphere of the certain carbon potential of formation in stove; Control carbon potential in stove by adjusting gas ratio and intake.
The all process steps such as carbonitriding in the present invention, quenching, tempering are all to complete in controlled atmosphere generator, have the advantages such as safe and applicable, economical and energy saving, technique are easy to operate, constant product quality.
embodiment:below in conjunction with embodiment, the present invention is further described.
Controlled atmosphere device of the present invention is selected controlled atmosphere generator, and first the 20CrMnTi gear part after cleaning, drying is sent in controlled atmosphere generator, exhaust-gas temperature rising to 850 ± 10 DEG C, and insulation 345min, controlling carbon potential in stove is that the last 1% oozed processing; Controlling carbon potential in stove is 0.8% again, 850 ± 10 DEG C of temperature, and insulation 60min carries out DIFFUSION TREATMENT; Then furnace temperature is down to 820 ± 10 DEG C, in stove, carbon-potential control, 0.8%, adopts oil quenching to 110 ± 10 DEG C in stove after insulation 60min; Last tempering is heated to 170 ± 10 DEG C, after insulation 160min through air cooling to room temperature.Gear part surface can reach HRC58-62, depth of penetration 0.8-0.9mm firmly after tested.Controlled atmosphere device of the present invention selects each gas of the controlled atmosphere of its use of controlled atmosphere generator can use prior art gaseous fraction composition.
Controlled atmosphere device of the present invention is by measuring the height of carbon potential in controlled atmosphere generator, adjust the flow of gas by under meter, nitrogen flow is controlled at 80-100ml/min, methyl alcohol flow control is at 30-40ml/min, ammonia flow is controlled at 3-5ml/min, and propane flow is controlled at 30-40ml/min.
Claims (5)
1. the heat treating method of a steel alloy gear, adopt carbonitriding to heat-treat under controlled atmosphere condition steel alloy gear, comprise carbonitriding, quenching, tempering process, it is characterized in that steel alloy gear, after cleaning, drying, being placed in controlled atmosphere device and processing as follows:
1) exhaust is heated to 840-860 DEG C, and constant temperature keeps 40-50 min, and controlling the carbon potential in device during this is 0.95-1.05%;
2) ooze by force processing, ooze by force time 300min, control during this in device carbon potential at 0.95-1.05%;
3) diffusion phase, diffusion time, 55-65min, controlled during this in device carbon potential at 0.75-0.85%;
4) cooling is processed, and is cooled to 810-830 DEG C, controls during this in device carbon potential at 0.75-0.85%;
5) samming processing, samming time 55-65min, controls during this in device carbon potential at 0.75-0.85%;
6) oil quenching processing, oil quenching temperature is 100-120 DEG C, controls during this in device carbon potential at 0.75-0.85%;
7) tempering heat treated, tempering is heated to 160-180 DEG C, soaking time 150-180min;
8) last air cooling, to room temperature, obtains product.
2. according to the heat treating method of steel alloy gear claimed in claim 1, it is characterized in that described controlled atmosphere is the nitrogen-based atmosphere being made into by nitrogen, methyl alcohol, ammonia, propane.
3. according to the heat treating method of steel alloy gear claimed in claim 1, it is characterized in that described carbonitriding, quenching, tempering process are all to complete in controlled atmosphere generator.
4. according to the heat treating method of steel alloy gear claimed in claim 1, it is characterized in that described steel alloy gear is low-carbon alloy steel gear.
5. according to the heat treating method of steel alloy gear claimed in claim 1, it is characterized in that described air cooling is nature or air-cooled cooling in air.
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| CN201410250478.XA CN103993154A (en) | 2014-06-09 | 2014-06-09 | Thermal treatment method of alloy steel gear |
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| CN201410250478.XA CN103993154A (en) | 2014-06-09 | 2014-06-09 | Thermal treatment method of alloy steel gear |
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| CN103993154A true CN103993154A (en) | 2014-08-20 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105002507A (en) * | 2015-02-06 | 2015-10-28 | 襄阳长源东谷实业股份有限公司 | 17CrNiMo6 material gear machining process |
| CN105401119A (en) * | 2015-10-28 | 2016-03-16 | 安徽省三方新材料科技有限公司 | Nitro-carburizing process for hard rock crushing lining plate |
| CN105463366A (en) * | 2014-09-04 | 2016-04-06 | 上海交运汽车精密冲压件有限公司 | Carburization method for automobile gearbox parking pawl |
| CN105969965A (en) * | 2016-04-27 | 2016-09-28 | 杭州高川机电科技有限公司 | Processing technology for maintaining hook, selection arm and brake pad in electronic dobby |
| CN105969946A (en) * | 2016-06-12 | 2016-09-28 | 江苏丰东热处理及表面改性工程技术研究有限公司 | Composite treatment process for impeller head blade |
| CN106222605A (en) * | 2016-08-29 | 2016-12-14 | 盐城圣奥热处理有限公司 | A kind of gear carburizing quenching process |
| CN106637060A (en) * | 2016-10-20 | 2017-05-10 | 洛阳Lyc轴承有限公司 | Carbonitriding heat treatment technique under new atmosphere |
| CN107447186A (en) * | 2017-07-31 | 2017-12-08 | 安徽沃德气门制造有限公司 | A kind of valve surfaces processing method |
| CN109487203A (en) * | 2018-12-31 | 2019-03-19 | 安徽银龙泵阀股份有限公司 | Valve plate surface carbo-nitriding processing method |
| CN111500834A (en) * | 2020-05-27 | 2020-08-07 | 江苏联峰实业有限公司 | Heat treatment process of gear steel for automobile gearbox |
| CN111647843A (en) * | 2020-06-17 | 2020-09-11 | 北华航天工业学院 | Composite heat treatment process for manufacturing hollow brick mold by using plate |
| CN114032493A (en) * | 2021-09-28 | 2022-02-11 | 上海热处理厂有限公司 | Method for modifying high hardness of surface of low-carbon alloy steel |
| CN117625917A (en) * | 2023-12-14 | 2024-03-01 | 扬州市海洋环保设备有限公司 | Wind power shell heat treatment device and process thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4470854A (en) * | 1981-10-01 | 1984-09-11 | Kabushiki Kaisha Komatsu Seisakusho | Surface hardening thermal treatment |
| JP2000008121A (en) * | 1998-06-19 | 2000-01-11 | Nissan Motor Co Ltd | Production of high facial pressure resistant parts and high facial resistant parts |
| EP1516940A1 (en) * | 2003-09-18 | 2005-03-23 | Mahindra & Mahindra Ltd. | Method for producing gears and/or shaft components with superior bending fatigue strength and pitting fatigue life from conventional alloy steel |
| CN101886165A (en) * | 2010-07-02 | 2010-11-17 | 镇江大力液压马达有限责任公司 | Heat treatment process for low-carbon multi-element alloy steel |
| CN102230151A (en) * | 2011-07-20 | 2011-11-02 | 新大洲本田摩托有限公司 | Heat treatment process of metal workpiece |
-
2014
- 2014-06-09 CN CN201410250478.XA patent/CN103993154A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4470854A (en) * | 1981-10-01 | 1984-09-11 | Kabushiki Kaisha Komatsu Seisakusho | Surface hardening thermal treatment |
| JP2000008121A (en) * | 1998-06-19 | 2000-01-11 | Nissan Motor Co Ltd | Production of high facial pressure resistant parts and high facial resistant parts |
| EP1516940A1 (en) * | 2003-09-18 | 2005-03-23 | Mahindra & Mahindra Ltd. | Method for producing gears and/or shaft components with superior bending fatigue strength and pitting fatigue life from conventional alloy steel |
| CN101886165A (en) * | 2010-07-02 | 2010-11-17 | 镇江大力液压马达有限责任公司 | Heat treatment process for low-carbon multi-element alloy steel |
| CN102230151A (en) * | 2011-07-20 | 2011-11-02 | 新大洲本田摩托有限公司 | Heat treatment process of metal workpiece |
Non-Patent Citations (1)
| Title |
|---|
| 张展 等: "《齿轮常用材料与热处理》", 31 March 2013 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105463366B (en) * | 2014-09-04 | 2018-05-15 | 上海交运汽车精密冲压件有限公司 | The method for carburizing of automobile gearbox park pawl |
| CN105463366A (en) * | 2014-09-04 | 2016-04-06 | 上海交运汽车精密冲压件有限公司 | Carburization method for automobile gearbox parking pawl |
| CN105002507A (en) * | 2015-02-06 | 2015-10-28 | 襄阳长源东谷实业股份有限公司 | 17CrNiMo6 material gear machining process |
| CN105401119A (en) * | 2015-10-28 | 2016-03-16 | 安徽省三方新材料科技有限公司 | Nitro-carburizing process for hard rock crushing lining plate |
| CN105969965A (en) * | 2016-04-27 | 2016-09-28 | 杭州高川机电科技有限公司 | Processing technology for maintaining hook, selection arm and brake pad in electronic dobby |
| CN105969946A (en) * | 2016-06-12 | 2016-09-28 | 江苏丰东热处理及表面改性工程技术研究有限公司 | Composite treatment process for impeller head blade |
| CN106222605A (en) * | 2016-08-29 | 2016-12-14 | 盐城圣奥热处理有限公司 | A kind of gear carburizing quenching process |
| CN106637060A (en) * | 2016-10-20 | 2017-05-10 | 洛阳Lyc轴承有限公司 | Carbonitriding heat treatment technique under new atmosphere |
| CN106637060B (en) * | 2016-10-20 | 2019-02-05 | 洛阳Lyc轴承有限公司 | A kind of carbo-nitriding heat-treatment technology method |
| CN107447186A (en) * | 2017-07-31 | 2017-12-08 | 安徽沃德气门制造有限公司 | A kind of valve surfaces processing method |
| CN109487203A (en) * | 2018-12-31 | 2019-03-19 | 安徽银龙泵阀股份有限公司 | Valve plate surface carbo-nitriding processing method |
| CN111500834A (en) * | 2020-05-27 | 2020-08-07 | 江苏联峰实业有限公司 | Heat treatment process of gear steel for automobile gearbox |
| CN111647843A (en) * | 2020-06-17 | 2020-09-11 | 北华航天工业学院 | Composite heat treatment process for manufacturing hollow brick mold by using plate |
| CN114032493A (en) * | 2021-09-28 | 2022-02-11 | 上海热处理厂有限公司 | Method for modifying high hardness of surface of low-carbon alloy steel |
| CN117625917A (en) * | 2023-12-14 | 2024-03-01 | 扬州市海洋环保设备有限公司 | Wind power shell heat treatment device and process thereof |
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