CN112342358A - Heat treatment method for automobile part machining - Google Patents
Heat treatment method for automobile part machining Download PDFInfo
- Publication number
- CN112342358A CN112342358A CN202011135819.0A CN202011135819A CN112342358A CN 112342358 A CN112342358 A CN 112342358A CN 202011135819 A CN202011135819 A CN 202011135819A CN 112342358 A CN112342358 A CN 112342358A
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- China
- Prior art keywords
- heat treatment
- workpiece
- temperature
- quenching
- treatment furnace
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention provides a heat treatment method for processing automobile parts, which comprises the following steps: cleaning the workpiece, clamping the workpiece, starting a heat treatment furnace to carry out heat treatment on the workpiece, introducing ammonia gas, and then carrying out quenching and tempering on the workpiece twice. According to the invention, the workpiece is subjected to nitriding heat treatment in the ammonia gas atmosphere, and the surface of the workpiece is nitrided, so that the surface hardness of the workpiece is obviously improved, and the wear resistance, corrosion resistance and fatigue resistance of the workpiece are improved; the invention is provided with two quenching and tempering processes, the two quenching processes can obviously enhance the internal hardness of the workpiece, and the tempering process can eliminate the stress generated by quenching.
Description
Technical Field
The invention relates to the technical field of heat treatment of automobile parts, in particular to a heat treatment method for processing the automobile parts.
Background
In the production process of automobile parts, heat treatment of workpieces usually requires multiple processes, such as heating, quenching, tempering, cooling, and the like. The key parts of the automobile, such as hub bearings, universal joints and other parts, have high mechanical requirements on mechanical strength, surface hardness, fatigue resistance and the like, and the comprehensive use performance of the parts is directly influenced by the heat treatment process. The existing domestic surface heat treatment process is old and does not achieve the characteristics of large processing difficulty and high requirement of automobile key parts. Therefore, the research on a novel heat treatment mode has great significance for improving the service performance of the product.
Disclosure of Invention
The invention aims to provide a heat treatment method for processing automobile parts, which overcomes the problems or at least partially solves the problems so as to solve the technical problem of heat treatment of the automobile parts.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a heat treatment method for processing automobile parts, which comprises the following steps:
(8) cleaning the workpiece, removing oil stains on the surface, and naturally drying in a ventilated and dustless environment;
(9) clamping the workpieces, fixing the workpieces by using a clamp, and preventing the workpieces from being contacted with each other;
(10) starting the heat treatment furnace, controlling the temperature to be T1, feeding the clamped workpiece into the heat treatment furnace, starting an ammonia valve, controlling the discharge of ammonia gas, and continuing for a period of time until the air is emptied;
(11) raising the temperature in the heat treatment furnace to T2, and preserving the heat for 5-6 hours;
(12) turning off the power supply of the heat treatment furnace, standing and cooling to T3, then turning on the heat treatment furnace to keep the temperature, turning off the ammonia valve, and keeping the temperature for 5-6 hours;
(13) turning off the power supply of the heat treatment furnace, taking out the workpiece, and quenching the workpiece;
(14) putting the work into the treatment furnace again, tempering the workpiece, setting the tempering temperature to be T4, and preserving heat for 1-2 hours;
(15) and taking out the work, quenching again, cleaning the work piece after quenching, and naturally drying.
As a further aspect of the present invention, in the step (3), the temperature of T1 is set to be 150 ℃ to 200 ℃.
As a further aspect of the present invention, in the step (4), the temperature of T2 is set to 800-900 ℃.
As a further aspect of the present invention, in the step (5), the temperature of T3 is set to 400-500 ℃.
As a further aspect of the present invention, in the step (7), the temperature of T4 is set to 350-450 ℃.
In a further embodiment of the present invention, in the step (6), cooling water is used as a medium for the first quenching; in the step (8), the medium for the secondary quenching is oil.
The invention provides a heat treatment method for processing automobile parts, which has the beneficial effects that: according to the invention, the workpiece is subjected to nitriding heat treatment in the ammonia gas atmosphere, and the surface of the workpiece is nitrided, so that the surface hardness of the workpiece is obviously improved, and the wear resistance, corrosion resistance and fatigue resistance of the workpiece are improved; the invention is provided with two quenching and tempering processes, the two quenching processes can obviously enhance the internal hardness of the workpiece, and the tempering process can eliminate the stress generated by quenching.
Detailed Description
The first embodiment is as follows:
a heat treatment method for automobile part processing comprises the following steps:
(1) cleaning the workpiece, removing oil stains on the surface, and naturally drying in a ventilated and dustless environment;
(2) clamping the workpieces, fixing the workpieces by using a clamp, and preventing the workpieces from being contacted with each other;
(3) starting the heat treatment furnace, controlling the temperature at 150 ℃, feeding the clamped workpiece into the heat treatment furnace, starting an ammonia valve, controlling the discharge of ammonia gas, and continuing for a period of time until the air is emptied;
(4) raising the temperature in the heat treatment furnace to 800 ℃, and preserving the heat for 5-6 hours;
(5) turning off the power supply of the heat treatment furnace, standing and cooling to 400 ℃, then turning on the heat treatment furnace again to keep the temperature, turning off the ammonia valve, and preserving the heat for 5-6 hours;
(6) turning off the power supply of the heat treatment furnace, taking out the workpiece, and quenching the workpiece by adopting water;
(7) putting the work into the treatment furnace again, tempering the workpiece, setting the tempering temperature to be 350 ℃, and preserving heat for 1-2 hours;
(8) and taking out the work, carrying out oil quenching again, cleaning the work piece after quenching, and naturally drying.
Example two:
a heat treatment method for automobile part processing comprises the following steps:
(1) cleaning the workpiece, removing oil stains on the surface, and naturally drying in a ventilated and dustless environment;
(2) clamping the workpieces, fixing the workpieces by using a clamp, and preventing the workpieces from being contacted with each other;
(3) starting a heat treatment furnace, controlling the temperature to be 200 ℃, feeding the clamped workpiece into the heat treatment furnace, starting an ammonia valve, controlling the discharge of ammonia gas, and continuing for a period of time until the air is emptied;
(4) raising the temperature in the heat treatment furnace to 900 ℃, and preserving the heat for 5-6 hours;
(5) turning off the power supply of the heat treatment furnace, standing and cooling to 500 ℃, then turning on the heat treatment furnace again to keep the temperature, turning off the ammonia valve, and preserving the heat for 5-6 hours;
(6) turning off the power supply of the heat treatment furnace, taking out the workpiece, and quenching the workpiece by adopting water;
(7) putting the work into the treatment furnace again, tempering the workpiece, setting the tempering temperature to be 450 ℃, and preserving heat for 1-2 hours;
(8) and taking out the work, carrying out oil quenching again, cleaning the work piece after quenching, and naturally drying.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (6)
1. A heat treatment method for automobile part processing comprises the following steps:
(1) cleaning the workpiece, removing oil stains on the surface, and naturally drying in a ventilated and dustless environment;
(2) clamping the workpieces, fixing the workpieces by using a clamp, and preventing the workpieces from being contacted with each other;
(3) starting the heat treatment furnace, controlling the temperature to be T1, feeding the clamped workpiece into the heat treatment furnace, starting an ammonia valve, controlling the discharge of ammonia gas, and continuing for a period of time until the air is emptied;
(4) raising the temperature in the heat treatment furnace to T2, and preserving the heat for 5-6 hours;
(5) turning off the power supply of the heat treatment furnace, standing and cooling to T3, then turning on the heat treatment furnace to keep the temperature, turning off the ammonia valve, and keeping the temperature for 5-6 hours;
(6) turning off the power supply of the heat treatment furnace, taking out the workpiece, and quenching the workpiece;
(7) putting the work into the treatment furnace again, tempering the workpiece, setting the tempering temperature to be T4, and preserving heat for 1-2 hours;
(8) and taking out the work, quenching again, cleaning the work piece after quenching, and naturally drying.
2. The heat treatment method for automobile part machining as claimed in claim 1, wherein in the step (3), the temperature of T1 is set to 150-200 ℃.
3. The heat treatment method for automobile part machining as claimed in claim 1, wherein in the step (4), the temperature of T2 is set to 800-900 ℃.
4. The heat treatment method for automobile part machining as claimed in claim 1, wherein in the step (5), the temperature of T3 is set to 400-500 ℃.
5. The heat treatment method for automobile part machining as claimed in claim 1, wherein in the step (7), the temperature of T4 is set to 350-450 ℃.
6. The heat treatment method for automobile accessory processing according to claim 1, wherein in the step (6), the medium for the first quenching is cooling water; in the step (8), the medium for the secondary quenching is oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011135819.0A CN112342358A (en) | 2020-10-22 | 2020-10-22 | Heat treatment method for automobile part machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011135819.0A CN112342358A (en) | 2020-10-22 | 2020-10-22 | Heat treatment method for automobile part machining |
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| Publication Number | Publication Date |
|---|---|
| CN112342358A true CN112342358A (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011135819.0A Pending CN112342358A (en) | 2020-10-22 | 2020-10-22 | Heat treatment method for automobile part machining |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1396297A (en) * | 2002-08-22 | 2003-02-12 | 上海交通大学 | High-temp quenching ageing or isothermal quenching technology for gas nitrizing |
| CN1804128A (en) * | 2005-11-30 | 2006-07-19 | 重庆长江轴承工业有限公司 | High carbon chromium bearing parts surface chemical heat-treatment process |
| CN101994118A (en) * | 2009-08-11 | 2011-03-30 | 顾安民 | Heat treatment method for steel pieces |
| CN103602944A (en) * | 2013-11-18 | 2014-02-26 | 祁标 | Thermal treatment furnace and thermal treatment technology thereof for super-huge type multifunctional natural gas energy-saving part |
| CN103834951A (en) * | 2012-11-27 | 2014-06-04 | 大连经济技术开发区圣洁真空技术开发有限公司 | Thermal treatment technology for high-precision bearing steel |
| CN104718305A (en) * | 2012-10-17 | 2015-06-17 | Ntn株式会社 | Bearing element, rolling bearing and process for producing bearing element |
| CN104894506A (en) * | 2015-06-24 | 2015-09-09 | 南车戚墅堰机车车辆工艺研究所有限公司 | Automobile transmission gear heat treatment method |
| CN110306150A (en) * | 2019-07-01 | 2019-10-08 | 克恩-里伯斯(太仓)有限公司 | A kind of Solid Solution Nitriding method |
-
2020
- 2020-10-22 CN CN202011135819.0A patent/CN112342358A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1396297A (en) * | 2002-08-22 | 2003-02-12 | 上海交通大学 | High-temp quenching ageing or isothermal quenching technology for gas nitrizing |
| CN1804128A (en) * | 2005-11-30 | 2006-07-19 | 重庆长江轴承工业有限公司 | High carbon chromium bearing parts surface chemical heat-treatment process |
| CN101994118A (en) * | 2009-08-11 | 2011-03-30 | 顾安民 | Heat treatment method for steel pieces |
| CN104718305A (en) * | 2012-10-17 | 2015-06-17 | Ntn株式会社 | Bearing element, rolling bearing and process for producing bearing element |
| CN103834951A (en) * | 2012-11-27 | 2014-06-04 | 大连经济技术开发区圣洁真空技术开发有限公司 | Thermal treatment technology for high-precision bearing steel |
| CN103602944A (en) * | 2013-11-18 | 2014-02-26 | 祁标 | Thermal treatment furnace and thermal treatment technology thereof for super-huge type multifunctional natural gas energy-saving part |
| CN104894506A (en) * | 2015-06-24 | 2015-09-09 | 南车戚墅堰机车车辆工艺研究所有限公司 | Automobile transmission gear heat treatment method |
| CN110306150A (en) * | 2019-07-01 | 2019-10-08 | 克恩-里伯斯(太仓)有限公司 | A kind of Solid Solution Nitriding method |
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Application publication date: 20210209 |