CN104498839A - Stainless steel powder metallurgy key part of automobile electronic vacuum pump and preparation method of key part - Google Patents
Stainless steel powder metallurgy key part of automobile electronic vacuum pump and preparation method of key part Download PDFInfo
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Abstract
The invention relates to a stainless steel powder metallurgy key part of an automobile electronic vacuum pump and a preparation method of the key part. The stainless steel powder metallurgy key part is prepared from the following components in percentage by weight: 0-0.2% of graphite, 0.9-3% of manganese, 17-25% of chromium, 0-20% of nickel, 0-5% of molybdenum, 0.4-1% of silicon carbide, 0.02-0.09% of sulfur and the balance of stainless steel powder. The temperature resistance, the corrosion resistance and the pressure resistance of the product are greatly improved.
Description
Technical field
The invention belongs to field of powder metallurgy, refer to electronic vehicle vacuum pump stainless steel powder metallurgical vital part and preparation method thereof especially.
Background technology
Electronic vacuum pump is mainly used in automatic catch vehicle, turbine increase engine become and electromobile breaking system in, it is to the effect alleviating keep plate operating physical force, be made up of vital parts such as pump chamber, pump chamber upper cover, pump casing cover, pump core, axles.But current domestic automobile electronic vacuum pump and key components and parts thereof are substantially all adopt import, particularly import German product; Though and domesticly have scientific research institutions and automobile vendor sporadicly to study, make some progress, from market feedback situation, still there is no ripe product.Along with state key advances the research and development of new energy vehicle, encourage the development of new energy vehicle, the breaking system of electromobile cannot obtain vacuum owing to not having engine from engine, but electronic vacuum pump provides certain vacuum tightness can to the breaking system of power truck, ensure that Conventional braking systems is braked on the basis of certain vacuum assistant ratio, this just well solves an electric parking brake system difficult problem, so electronic vacuum pump is mathematical in the developing position of future automobile.
But, traditional stainless steel components generally adopts casting or forging manufacturing technique to produce, but the stainless steel components machining difficulty that casting is produced, and poor dimensional precision, surface irregularity, to be subject to certain restrictions in shape, easy generation element segregation, have the deficiency such as shrinkage cavity, sand holes, and also there is plasticity difference, distortion difficulty, the low and high in cost of production problem of material use efficiency with the stainless steel that forging method is produced, therefore they in manufacturing machine part, there is many technology difficult.
20 century 70s, owing to adopting atomization to produce developing rapidly of pre-alloyed powder, making to prepare high performance powder metallurgical stainless steel product becomes possibility.But powder of stainless steel is a kind of pre-alloying powder of high alloy content, and its hardness is high, compressibility is poor.Therefore, there is hole with the stainless steel components inside of conventional moulded explained hereafter, density is often lower, and its corrosion resistance nature and mechanical property generally all lower than corresponding fine and close stainless steel, thus make the application of powder metallurgical stainless steel be very limited.
Summary of the invention
The present invention is directed to defect and deficiency that the aspects such as electronic vacuum pump vital part erosion resistance, compressive property and the precision size degree that prior art obtains exist, provide a kind of automotive electronics vacuum pump stainless steel powder metallurgical vital part and preparation method thereof.
For solving the problems of the technologies described above, the invention provides a kind of automotive electronics vacuum pump stainless steel powder metallurgical vital part, its composition comprises by weight percentage, 0 ~ 0.2% graphite, the manganese of 0.9 ~ 3%, the chromium of 17 ~ 25%, the nickel of 0 ~ 20%, the molybdenum of 0 ~ 5%, the silicon carbide of 0.4 ~ 1%, the sulphur of 0.02 ~ 0.09%, surplus is powder of stainless steel; Wherein said powder of stainless steel is 430L powder of stainless steel.
A kind of preparation method of automotive electronics vacuum pump stainless steel powder metallurgical vital part is:
Batching is the graphite of 0 ~ 0.2% by mass percentage, the manganese of 0.9 ~ 3%, the chromium of 17 ~ 25%, the nickel of 0 ~ 20%, the molybdenum of 0 ~ 5%, the silicon carbide of 0.4 ~ 1%, the sulphur of 0.02 ~ 0.09%, and surplus is powder of stainless steel; By above-mentioned each component processing or choice of powder, the powder diameter of various component is: graphite 300-500 order, manganese 100-500 order, chromium 100-500 order, nickel 100-500 order, molybdenum 100-500 order, silicon carbide 100-500 order, sulphur 100-500 order, above-mentioned each powder is added mixer mixing, mixing time is 50 ~ 70min;
Be shaped, mixed powder is added in mould at 80t/cm
2pressure 5-10s, make pressure embryo;
Alloying sinters, by the pressure embryo after compacting at 1200-1280 DEG C of sintering, after cool and obtain first product.
Refining processing, carries out refining processing by the first product after sintering, obtains finished product.
Described refining processing comprises shaping, Vehicle Processing, honing, light decorations process.
In described preparation method, add lubricant when half the time is carried out in powder mixing.
Described lubricant is Zinic stearas.
Described sintering adopts and sinters stage by stage, and first under protective atmosphere condition, mixed powder carries out presintering at 700-900 DEG C, and sintering time is 0.5-2 hour, then in the cooling after 1.5-3 hour of 1200-1280 DEG C of sintering.Described temperature-fall period is divided into two stages, and first stage entered subordinate phase cooling after 700-900 DEG C of borehole cooling 0.5-2 hour, and described subordinate phase cooling is for circulating water is to room temperature.
Described protective atmosphere is hydrogen, and it is 3-5 cubic meter/hour that hydrogen pours in speed.
The Advantageous Effects that the present invention reaches:
The present invention, by adding the metallic elements such as chromium, manganese, nickel in 430L Stainless Steel Powder powder stock, substantially increase the temperature tolerance of product, erosion resistance and compressive property, confirm by experiment, adopt technical scheme of the present invention, obtained electronic vacuum pump vital part, rotates the 0.01-0.015mm that to wear and tear after 2000 hours continuously under high temperature 180 DEG C, rotating speed are 4000 revs/min.In addition, in sintering process, add SiC, greatly reduce sintering temperature, improve the density of sintered compact.
Embodiment
In order to the technique effect that auditor can better understand technical characteristic of the present invention, technology contents and reach, below in conjunction with embodiment, patent of the present invention is further illustrated, it should be noted that following embodiment only can be used for explaining the present invention and can not being interpreted as being limitation of the present invention.
A kind of automotive electronics vacuum pump stainless steel powder metallurgical vital part, its composition comprises by weight percentage, 0 ~ 0.2% graphite, the manganese of 0.9 ~ 3%, the chromium of 17 ~ 25%, the nickel of 0 ~ 20%, the molybdenum of 0 ~ 5%, the silicon carbide of 0.4 ~ 1%, the sulphur of 0.02 ~ 0.09%, surplus is powder of stainless steel; Wherein said powder of stainless steel is 430L powder of stainless steel.
A kind of preparation method of automotive electronics vacuum pump stainless steel powder metallurgical vital part is:
Batching is the graphite of 0 ~ 0.2% by mass percentage, the manganese of 0.9 ~ 3%, the chromium of 17 ~ 25%, the nickel of 0 ~ 20%, the molybdenum of 0 ~ 5%, the silicon carbide of 0.4 ~ 1%, the sulphur of 0.02 ~ 0.09%, and surplus is powder of stainless steel; By above-mentioned each component processing or choice of powder, the powder diameter of various component is: graphite 300-500 order, manganese 100-500 order, chromium 100-500 order, nickel 100-500 order, molybdenum 100-500 order, silicon carbide 100-500 order, sulphur 100-500 order, above-mentioned each powder is added mixer mixing, mixing time is 50 ~ 70min;
Be shaped, mixed powder is added in mould at 80t/cm
2pressure 5-10s, make pressure embryo;
Alloying sinters, by the pressure embryo after compacting at 1200-1280 DEG C of sintering, after cool and obtain first product.
Refining processing, carries out refining processing by the first product after sintering, obtains finished product.
Described refining processing comprises shaping, Vehicle Processing, honing, light decorations process.
In described preparation method, add lubricant when half the time is carried out in powder mixing.
Described lubricant is Zinic stearas.
Described sintering adopts and sinters stage by stage, and first under protective atmosphere condition, mixed powder carries out presintering at 700-900 DEG C, and sintering time is 0.5-2 hour, then in the cooling after 1.5-3 hour of 1200-1280 DEG C of sintering.Described temperature-fall period is divided into two stages, and first stage entered subordinate phase cooling after 700-900 DEG C of borehole cooling 0.5-2 hour, and described subordinate phase cooling is for circulating water is to room temperature.
Described protective atmosphere is hydrogen, and it is 3-5 cubic meter/hour that hydrogen pours in speed.
By adding the metallic elements such as chromium, manganese, nickel in 430L Stainless Steel Powder powder stock, substantially increase the temperature tolerance of product, erosion resistance and compressive property, confirm by experiment, adopt technical scheme of the present invention, obtained electronic vacuum pump vital part, rotates the 0.01-0.015mm that to wear and tear after 2000 hours continuously under high temperature 180 DEG C, rotating speed are 4000 revs/min.In addition, in sintering process, add SiC, greatly reduce sintering temperature, improve the density of sintered compact.
Embodiment 1
A kind of automotive electronics vacuum pump stainless steel powder metallurgical vital part, is characterized in that: its composition comprises by weight percentage, the manganese of 0.9%, the chromium of 17%, the silicon carbide of 0.4%, the sulphur of 0.02%, and surplus is powder of stainless steel; Wherein said powder of stainless steel is 430L powder of stainless steel.
Described preparation method is:
Batching is the manganese of 0.9% by mass percentage, the chromium of 17%, the silicon carbide of 0.4%, the sulphur of 0.02%, and surplus is powder of stainless steel; By above-mentioned each component processing or choice of powder, the powder diameter of various component is: graphite 300-500 order, manganese 100-500 order, chromium 100-500 order, silicon carbide 100-500 order, sulphur 100-500 order, above-mentioned each powder is added mixer mixing, mixing time is 50min;
Be shaped, mixed powder is added in mould at 80t/cm
2pressure 10s, make pressure embryo;
Alloying sinters, by the pressure embryo after compacting at 1200-1280 DEG C of sintering, after cool and obtain first product.
Refining processing, carries out refining processing by the first product after sintering, obtains finished product.
Embodiment 2
A kind of automotive electronics vacuum pump stainless steel powder metallurgical vital part, is characterized in that: its composition comprises by weight percentage, 0.1% graphite, the manganese of 2%, the chromium of 20%, the nickel of 10%, the molybdenum of 2.5%, the silicon carbide of 0.7%, the sulphur of 0.06%, surplus is powder of stainless steel; Wherein said powder of stainless steel is 430L powder of stainless steel.
Described preparation method is:
Batching is the graphite of 0.1% by mass percentage, the manganese of 2%, the chromium of 20%, the nickel of 0.06%, the silicon carbide of 0.7%, the sulphur of 0.06%, and surplus is powder of stainless steel; By above-mentioned each component processing or choice of powder, the powder diameter of various component is: graphite 300-500 order, manganese 100-500 order, chromium 100-500 order, nickel 100-500 order, molybdenum 100-500 order, silicon carbide 100-500 order, sulphur 100-500 order, above-mentioned each powder is added mixer mixing, mixing time is 70min;
Be shaped, mixed powder is added in mould at 80t/cm
2pressure 10s, make pressure embryo;
Alloying sinters, by the pressure embryo after compacting at 1200-1280 DEG C of sintering, after cool and obtain first product.
Refining processing, carries out refining processing by the first product after sintering, obtains finished product.
Embodiment 3
A kind of automotive electronics vacuum pump stainless steel powder metallurgical vital part, is characterized in that: its composition comprises by weight percentage, 0.2% graphite, the manganese of 3%, the chromium of 25%, the nickel of 20%, the molybdenum of 5%, the silicon carbide of 1%, the sulphur of 0.09%, surplus is powder of stainless steel; Wherein said powder of stainless steel is 430L powder of stainless steel.
Described preparation method is:
Batching is the graphite of 0.2% by mass percentage, the manganese of 3%, the chromium of 25%, the nickel of 20%, the molybdenum of 5%, the silicon carbide of 1%, the sulphur of 0.09%, and surplus is powder of stainless steel; By above-mentioned each component processing or choice of powder, the powder diameter of various component is: graphite 300-500 order, manganese 100-500 order, chromium 100-500 order, nickel 100-500 order, molybdenum 100-500 order, silicon carbide 100-500 order, sulphur 100-500 order, above-mentioned each powder is added mixer mixing, mixing time is 60min;
Be shaped, mixed powder is added in mould at 80t/cm
2pressure 8s, make pressure embryo;
Alloying sinters, by the pressure embryo after compacting at 1200-1280 DEG C of sintering, after cool and obtain first product.
Refining processing, carries out refining processing by the first product after sintering, obtains finished product.
Below disclose the present invention with preferred embodiment, so it is not intended to limiting the invention, and all technical schemes taking the scheme of equivalent replacement or equivalent transformation to obtain, all drop in protection scope of the present invention.
Claims (8)
1. an electronic vehicle vacuum pump stainless steel powder metallurgical vital part, it is characterized in that: its composition comprises by weight percentage, 0 ~ 0.2% graphite, the manganese of 0.9 ~ 3%, the chromium of 17 ~ 25%, the nickel of 0 ~ 20%, the molybdenum of 0 ~ 5%, the silicon carbide of 0.4 ~ 1%, the sulphur of 0.02 ~ 0.09%, surplus is powder of stainless steel.
2. powder metallurgy vital part according to claim 1, is characterized in that: described powder of stainless steel is 430L powder of stainless steel.
3. a preparation method for electronic vehicle vacuum pump stainless steel powder metallurgical vital part, is characterized in that:
Batching is the graphite of 0 ~ 0.2% by mass percentage, the manganese of 0.9 ~ 3%, the chromium of 17 ~ 25%, the nickel of 0 ~ 20%, the molybdenum of 0 ~ 5%, the silicon carbide of 0.4 ~ 1%, the sulphur of 0.02 ~ 0.09%, and surplus is powder of stainless steel; By above-mentioned each component processing or choice of powder, the powder diameter of various component is: graphite 300-500 order, manganese 100-500 order, chromium 100-500 order, nickel 100-500 order, molybdenum 100-500 order, silicon carbide 100-500 order, sulphur 100-500 order, above-mentioned each powder is added mixer mixing, mixing time is 50 ~ 70min;
Be shaped, mixed powder is added in mould at 80t/cm
2pressure 5-10s, make pressure embryo;
Alloying sinters, by the pressure embryo after compacting at 1200-1280 DEG C of sintering, after cool and obtain first product;
Refining processing, carries out refining processing by the first product after sintering, obtains finished product.
4. preparation method according to claim 3, is characterized in that: described refining processing comprises shaping, Vehicle Processing, honing, light decorations process.
5. preparation method according to claim 3, is characterized in that: add lubricant when half the time is carried out in powder mixing.
6. preparation method according to claim 4, is characterized in that: described lubricant is Zinic stearas.
7. preparation method according to claim 3, it is characterized in that: described sintering adopts and sinters stage by stage, first under protective atmosphere condition, mixed powder carries out presintering at 700-900 DEG C, and sintering time is 0.5-2 hour, then in the cooling after 1.5-3 hour of 1200-1280 DEG C of sintering; Described temperature-fall period is divided into two stages, and first stage entered subordinate phase cooling after 700-900 DEG C of borehole cooling 0.5-2 hour, and described subordinate phase cooling is for circulating water is to room temperature.
8. preparation method according to claim 7, is characterized in that: described protective atmosphere is hydrogen, and it is 3-5 cube m/h that hydrogen pours in speed.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238737A (en) * | 2016-08-29 | 2016-12-21 | 海安县鹰球粉末冶金有限公司 | Vacuum automobile source pump chamber manufacture method |
| CN106566974A (en) * | 2016-11-01 | 2017-04-19 | 安徽恒均粉末冶金科技股份有限公司 | Automobile magnetic water pump powder metallurgy inner/outer magnet ring and preparation method thereof |
| CN106987767A (en) * | 2017-03-16 | 2017-07-28 | 河北新华高压电器股份有限公司 | Environment-friendly type iron-based material and its product, application |
| CN107858584A (en) * | 2017-12-14 | 2018-03-30 | 泰兴市长江密封材料有限公司 | A kind of piece of refractory metal material |
| CN108857276A (en) * | 2018-06-28 | 2018-11-23 | 安徽恒均粉末冶金科技股份有限公司 | Drive sleeve and its manufacturing method |
| CN109128188A (en) * | 2018-09-15 | 2019-01-04 | 无锡市金珀车业有限公司 | A kind of disc brake piston powder metallurgical processing moulding process |
| CN114776426A (en) * | 2022-05-27 | 2022-07-22 | 陕西豪德特粉末冶金新材料有限公司 | Flange plate of air inlet and exhaust pipe of automobile engine and composite preparation process of flange plate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633042A (en) * | 2008-07-24 | 2010-01-27 | Mtig株式会社 | Method of manufacturing powder injection-molded body |
| CN102383016A (en) * | 2011-11-02 | 2012-03-21 | 中南大学 | Microwave sintering and heat treatment method for preparing high-performance tungsten-based high-density alloy |
-
2014
- 2014-12-02 CN CN201410719980.0A patent/CN104498839B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633042A (en) * | 2008-07-24 | 2010-01-27 | Mtig株式会社 | Method of manufacturing powder injection-molded body |
| CN102383016A (en) * | 2011-11-02 | 2012-03-21 | 中南大学 | Microwave sintering and heat treatment method for preparing high-performance tungsten-based high-density alloy |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238737A (en) * | 2016-08-29 | 2016-12-21 | 海安县鹰球粉末冶金有限公司 | Vacuum automobile source pump chamber manufacture method |
| CN106566974A (en) * | 2016-11-01 | 2017-04-19 | 安徽恒均粉末冶金科技股份有限公司 | Automobile magnetic water pump powder metallurgy inner/outer magnet ring and preparation method thereof |
| CN106987767A (en) * | 2017-03-16 | 2017-07-28 | 河北新华高压电器股份有限公司 | Environment-friendly type iron-based material and its product, application |
| CN106987767B (en) * | 2017-03-16 | 2019-07-09 | 河北新华高压电器股份有限公司 | Environment-friendly type iron-based material and its product, application |
| CN107858584A (en) * | 2017-12-14 | 2018-03-30 | 泰兴市长江密封材料有限公司 | A kind of piece of refractory metal material |
| CN108857276A (en) * | 2018-06-28 | 2018-11-23 | 安徽恒均粉末冶金科技股份有限公司 | Drive sleeve and its manufacturing method |
| CN109128188A (en) * | 2018-09-15 | 2019-01-04 | 无锡市金珀车业有限公司 | A kind of disc brake piston powder metallurgical processing moulding process |
| CN114776426A (en) * | 2022-05-27 | 2022-07-22 | 陕西豪德特粉末冶金新材料有限公司 | Flange plate of air inlet and exhaust pipe of automobile engine and composite preparation process of flange plate |
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