CN102534159A - Process for thermally treating automotive supporting axle case body - Google Patents
Process for thermally treating automotive supporting axle case body Download PDFInfo
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- CN102534159A CN102534159A CN2011104330100A CN201110433010A CN102534159A CN 102534159 A CN102534159 A CN 102534159A CN 2011104330100 A CN2011104330100 A CN 2011104330100A CN 201110433010 A CN201110433010 A CN 201110433010A CN 102534159 A CN102534159 A CN 102534159A
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- Prior art keywords
- axle housing
- cooling
- case body
- quenching
- axle case
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Abstract
The invention discloses a process for thermally treating an automotive supporting axle case body, which comprises the following steps: (1) quenching: placing the supporting axle case body in a heat treatment furnace, heating to 890-900 DEG C, and keeping for 90 minutes; taking out the supporting axle case body from the heat treatment furnace, placing into a quenching cooling groove, and quenching the supporting axle case body under the following conditions: a quenching temperature of 850-870 DEG C, a cooling time of longer than or equal to 3 minutes and 10% NaCl aqueous solution of a temperature lower than or equal to 35 DEG C as a cooling medium, wherein a stirring device is started before the axle case body is placed into the cooling groove, so as to enable the cooling medium to move vigorously in the groove; and (2) tempering: placing the supporting axle case body into the heat treatment furnace, heating to 400-410 DEG C, and keeping for 3 hours; taking out the axle case body from the heat treatment furnace into a tempering cooling groove for cooling, wherein the cooling medium is water. Because 10% NaCl aqueous solution has a better cooling effect than the cooling effect of water, and can stop bubble aggregation on the surface of the axle case body while quenching cooling in an axle tube, the quenching soft spot is avoided.
Description
Technical field
The invention belongs to automobile component heat treatment technics field, be specifically related to the thermal treatment process that a kind of automobile that improves the strength of materials supports axle housing.
Background technology
The supporting bridge axle housing generally adopts low-carbon low-alloy steel as the axle housing material; This material belongs to mid-strength material; This toughness of material and weldableness are good; But because domestic road conditions are complicated, the overload phenomenon is serious, situation such as axle housing flexural deformation, fracture in use appear in the axle housing of this material easily.Later stage has occurred axle housing is carried out the technology that Q-tempering is handled; But because soft steel is difficult for quenching; Occur the quenching soft spots easily, and the supporting bridge axle housing belongs to the major axis large-mass workpiece and is not easy more to quench to get angry, therefore the low phenomenon of supporting bridge axle housing ubiquity spindle nose neck bearing platform place's hardness on the market now; The dangerous position that belongs to stress concentration here, vehicle bridge is running into fracture easily under the excessive situation of overload or moment impact load.
Summary of the invention
Deficiency to the prior art existence; Technical problem to be solved by this invention is; Provide a kind of and handle, and improve the automobile support axle housing thermal treatment process that the quench cooled system realizes promoting axle housing supporting capacity (bending strength and quiet rigidity) and avoids axletree quenching soft spots to produce through the supporting bridge axle housing being carried out Q-tempering.
For solving the problems of the technologies described above, the technical scheme that the present invention taked is: a kind of automobile supports the axle housing thermal treatment process, and it comprises the following steps:
(1), quench:
A, the supporting bridge axle housing is put into heat treatment furnace be heated to 890 ℃～900 ℃, be incubated 90 minutes;
B, the supporting bridge axle housing is taken out in heat treatment furnace, put into quenching tank, the supporting bridge axle housing is carried out quench treatment.850 ℃～870 ℃ of quenching temperatures, cooling time>=3 minute, heat-eliminating medium is the 10%NaCl aqueous solution, solution temperature≤35 ℃.Before axle housing is gone into cooling tank, start whipping appts, make heat-eliminating medium vigorous exercise in groove;
(2), tempering:
A, the supporting bridge axle housing is put into heat treatment furnace, be heated to 400 ℃～410 ℃, be incubated 3 hours;
B, axle housing is taken out from heat treatment furnace, put into the cooling of tempering cooling tank.Heat-eliminating medium is a water.
Above-mentioned automobile supports the axle housing thermal treatment process, and said quenching temperature is 860 ℃, and be 5 minutes cooling time.
Above-mentioned automobile supports the axle housing thermal treatment process, and said tempering Heating temperature is 405 ℃, is incubated 3 hours.
The advantage that automobile of the present invention supports the thermal treatment process of axle housing is:
1, improves the hardness of central siphon.Former central siphon hardness is about 160～190HB, can reach 24～28HRC after the thermal treatment, get the pulling force sample from central siphon and detect, its ys by 590MPa about, be increased to 660～690MPa.Promoted the performance of material.
2, because the cooling performance of the 10%NaCl aqueous solution is better than water, and it can stop the gathering of axle housing open bubble when the central siphon quench cooled, avoids the soft spots that quenches.Owing in cooling tank, used the whisking appliance cooling system; Make the speed of relative movement between heat-eliminating medium and the axle housing increase; Water in the whole cooling tank all begins to circulate; Therefore the mobile medium is very fast takes away the heat on the axle housing, has avoided axle housing because the bad low phenomenon of quenching hardness that causes of local heat-eliminating medium flowability.Through detecting, the hardness at axle housing neck bearing platform place can reach 21～25HRC.
Embodiment
Below in conjunction with specific embodiment the present invention is explained further details;
Embodiment 1:
A kind of automobile supports the axle housing thermal treatment process, and it comprises the following steps:
(1), quench:
A, the supporting bridge axle housing is put into heat treatment furnace be heated to 890 ℃, be incubated 90 minutes;
B, the supporting bridge axle housing is taken out in heat treatment furnace, put into quenching tank, the supporting bridge axle housing is carried out quench treatment.850 ℃ of quenching temperatures, 3 minutes cooling times, heat-eliminating medium is the 10%NaCl aqueous solution, 25 ℃ of solution temperatures.Before axle housing is gone into cooling tank, start whipping appts, make heat-eliminating medium vigorous exercise in groove;
(2), tempering:
A, the supporting bridge axle housing is put into heat treatment furnace, be heated to 400 ℃, be incubated 3 hours;
B, axle housing is taken out from heat treatment furnace, put into the cooling of tempering cooling tank.Heat-eliminating medium is a water.
Embodiment 2:
A kind of automobile supports the axle housing thermal treatment process, and it comprises the following steps:
(1), quench:
A, the supporting bridge axle housing is put into heat treatment furnace be heated to 895 ℃, be incubated 90 minutes;
B, the supporting bridge axle housing is taken out in heat treatment furnace, put into quenching tank, the supporting bridge axle housing is carried out quench treatment.860 ℃ of quenching temperatures, 5 minutes cooling times, heat-eliminating medium is the 10%NaCl aqueous solution, 30 ℃ of solution temperatures.Before axle housing is gone into cooling tank, start whipping appts, make heat-eliminating medium vigorous exercise in groove;
(2), tempering:
A, the supporting bridge axle housing is put into heat treatment furnace, be heated to 405 ℃, be incubated 3 hours;
B, axle housing is taken out from heat treatment furnace, put into the cooling of tempering cooling tank.Heat-eliminating medium is a water.
Embodiment 3:
A kind of automobile supports the axle housing thermal treatment process, and it comprises the following steps:
(1), quench:
A, the supporting bridge axle housing is put into heat treatment furnace be heated to 900 ℃, be incubated 90 minutes;
B, the supporting bridge axle housing is taken out in heat treatment furnace, put into quenching tank, the supporting bridge axle housing is carried out quench treatment.870 ℃ of quenching temperatures, 8 minutes cooling times, heat-eliminating medium is the 10%NaCl aqueous solution, 35 ℃ of solution temperatures.Before axle housing is gone into cooling tank, start whipping appts, make heat-eliminating medium vigorous exercise in groove;
(2), tempering:
A, the supporting bridge axle housing is put into heat treatment furnace, be heated to 410 ℃, be incubated 3 hours;
B, axle housing is taken out from heat treatment furnace, put into the cooling of tempering cooling tank.Heat-eliminating medium is a water.
Certainly, above-mentioned explanation is not to be limitation of the present invention, and the present invention also is not limited to above-mentioned giving an example; Those skilled in the art; In essential scope of the present invention, the variation of making, remodeling, interpolation or replacement all should belong to protection scope of the present invention.
Claims (3)
1. an automobile supports the axle housing thermal treatment process, and it comprises the following steps:
(1), quench:
A, the supporting bridge axle housing is put into heat treatment furnace be heated to 890 ℃～900 ℃, be incubated 90 minutes;
B, the supporting bridge axle housing is taken out in heat treatment furnace, put into quenching tank, the supporting bridge axle housing is carried out quench treatment.850 ℃～870 ℃ of quenching temperatures, cooling time>=3 minute, heat-eliminating medium is the 10%NaCl aqueous solution, solution temperature≤35 ℃.Before axle housing is gone into cooling tank, start whipping appts, make heat-eliminating medium vigorous exercise in groove;
(2), tempering:
A, the supporting bridge axle housing is put into heat treatment furnace, be heated to 400 ℃～410 ℃, be incubated 3 hours;
B, axle housing is taken out from heat treatment furnace, put into the cooling of tempering cooling tank.Heat-eliminating medium is a water.
2. automobile according to claim 1 supports the axle housing thermal treatment process, and it is characterized in that: said quenching temperature is 860 ℃, and be 5 minutes cooling time.
3. automobile according to claim 1 supports the axle housing thermal treatment process, and it is characterized in that: said tempering Heating temperature is 405 ℃, is incubated 3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104330100A CN102534159A (en) | 2011-12-14 | 2011-12-14 | Process for thermally treating automotive supporting axle case body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104330100A CN102534159A (en) | 2011-12-14 | 2011-12-14 | Process for thermally treating automotive supporting axle case body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102534159A true CN102534159A (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2011104330100A Pending CN102534159A (en) | 2011-12-14 | 2011-12-14 | Process for thermally treating automotive supporting axle case body |
Country Status (1)
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| CN (1) | CN102534159A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667612A (en) * | 2013-12-05 | 2014-03-26 | 湖南中联重科车桥有限公司 | Axle housing heat treatment method and axle housing making method |
| CN103740897A (en) * | 2013-12-21 | 2014-04-23 | 青特集团有限公司 | Incomplete quenching process of semitrailer axles |
| CN113174474A (en) * | 2021-05-26 | 2021-07-27 | 上海煜志科技有限公司 | Salt bath heat treatment furnace and control method thereof |
| CN114354680A (en) * | 2021-12-08 | 2022-04-15 | 东风汽车集团股份有限公司 | PAG quenching medium cooling performance analysis method |
| CN115386692A (en) * | 2022-09-26 | 2022-11-25 | 中国第一汽车股份有限公司 | Heat treatment method for improving hardness of low alloy steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4843906A (en) * | 1986-12-24 | 1989-07-04 | Isuzu Motors Limited | Rear axlecase and methods of manufacturing thereof |
| CN101275179A (en) * | 2007-03-27 | 2008-10-01 | 陕西汽车集团有限责任公司 | Heat treatment process for automobile drive axle housing |
| CN101423888A (en) * | 2008-10-31 | 2009-05-06 | 青特集团有限公司 | Whole heat treatment process of integral car axle |
| CN101805824A (en) * | 2010-03-23 | 2010-08-18 | 中信重工机械股份有限公司 | Interrupted quenching thermal treatment method of 42CrMo4 roller shaft |
-
2011
- 2011-12-14 CN CN2011104330100A patent/CN102534159A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4843906A (en) * | 1986-12-24 | 1989-07-04 | Isuzu Motors Limited | Rear axlecase and methods of manufacturing thereof |
| CN101275179A (en) * | 2007-03-27 | 2008-10-01 | 陕西汽车集团有限责任公司 | Heat treatment process for automobile drive axle housing |
| CN101423888A (en) * | 2008-10-31 | 2009-05-06 | 青特集团有限公司 | Whole heat treatment process of integral car axle |
| CN101805824A (en) * | 2010-03-23 | 2010-08-18 | 中信重工机械股份有限公司 | Interrupted quenching thermal treatment method of 42CrMo4 roller shaft |
Non-Patent Citations (1)
| Title |
|---|
| 刘卫国: "斯太尔13t级后桥壳强度分析及改进方案探讨", 《陕西汽车》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667612A (en) * | 2013-12-05 | 2014-03-26 | 湖南中联重科车桥有限公司 | Axle housing heat treatment method and axle housing making method |
| CN103667612B (en) * | 2013-12-05 | 2016-02-10 | 湖南中联重科车桥有限公司 | The method of thermal treatment axle housing and the method for manufacture axle housing |
| CN103740897A (en) * | 2013-12-21 | 2014-04-23 | 青特集团有限公司 | Incomplete quenching process of semitrailer axles |
| CN113174474A (en) * | 2021-05-26 | 2021-07-27 | 上海煜志科技有限公司 | Salt bath heat treatment furnace and control method thereof |
| CN114354680A (en) * | 2021-12-08 | 2022-04-15 | 东风汽车集团股份有限公司 | PAG quenching medium cooling performance analysis method |
| CN115386692A (en) * | 2022-09-26 | 2022-11-25 | 中国第一汽车股份有限公司 | Heat treatment method for improving hardness of low alloy steel |
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Application publication date: 20120704 |