CN111863488A - Method for preparing electric appliance switch contact by powder metallurgy copper-tungsten alloy - Google Patents
Method for preparing electric appliance switch contact by powder metallurgy copper-tungsten alloy Download PDFInfo
- Publication number
- CN111863488A CN111863488A CN202010668911.7A CN202010668911A CN111863488A CN 111863488 A CN111863488 A CN 111863488A CN 202010668911 A CN202010668911 A CN 202010668911A CN 111863488 A CN111863488 A CN 111863488A
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- China
- Prior art keywords
- contact
- tungsten
- copper
- steps
- sintering
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
- H01H11/048—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by powder-metallurgical processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
Abstract
The invention aims to provide a method for preparing an electric switch contact by powder metallurgy copper-tungsten alloy, which comprises the steps of selecting copper powder and a tungsten contact, mixing the copper powder, then performing press forming, manually adding the tungsten contact, sintering, shaping and polishing to obtain a final finished contact, improving the sintering melting point and the conductivity of the contact, improving the strength and the conductivity of the contact by adding the tungsten contact, wherein the sintering adopts the flow of 6-8M3The hydrogen gas protective atmosphere of the/H ensures that the tungsten contact and the copper powder are sintered, fused and alloyed without oxidation, improves the conductivity of the product and prolongs the service life of the product, and adopts polishing solution and ceramic polishing material to carry out subsequent polishing treatment, so that the treated product has the advantages of oxidation resistance and surface smoothness improvementThe contact is high in contact and oxidation resistance, and the whole contact is excellent in conductivity and strength and hardness in the using process.
Description
Technical Field
The invention relates to the field of electrical switch contacts, in particular to a method for preparing an electrical switch contact by using powder metallurgy copper-tungsten alloy.
Background
The copper-tungsten contact is applied to various switches, relays, timers, leakage protectors, thermal protectors, low-voltage electrical appliances, electronic products, electrical products and other original products. The safety and reliability of the switch are greatly determined by the physical properties of the contact material and the electrical characteristics of the contact material. The preparation method of the copper-tungsten contact at home and abroad at present comprises the following steps: the riveting tungsten head is made of copper material as a base body, so that the processing efficiency is low, the utilization rate of the section is high, and the conditions of resource waste and environmental pollution are avoided. A copper tungsten alloy is needed to make contacts. Therefore, it is necessary to solve this problem.
Disclosure of Invention
In order to solve the problems, the invention provides a method for preparing an electric switch contact by powder metallurgy copper-tungsten alloy, which comprises the steps of selecting copper powder and a tungsten contact, mixing the copper powder, then carrying out press forming, manually adding the tungsten contact, sintering, shaping and polishing to obtain a final finished contact, improving the sintering melting point and the conductivity of the contact, improving the strength and the conductivity of the contact by adding the tungsten contact, wherein the sintering adopts the flow of 6-8M3The hydrogen protective atmosphere of the/H ensures that the tungsten contact and the copper powder are sintered, fused and alloyed, are free of oxidation, improve the conductivity of the product and prolong the service life of the product, and the polishing solution and the ceramic polishing material are adopted for subsequent polishing treatment, so that the treated product is antioxidant, the surface smoothness is improved, the contact head is better contacted and antioxidant in the using process, the whole contact head is excellent in conductivity and good in strength and hardness, and the problems in the background technology are solved.
The invention aims to provide a method for preparing an electric switch contact by using powder metallurgy copper-tungsten alloy, which comprises copper powder and a tungsten contact;
the preparation method comprises the following steps:
the method comprises the following steps: adding copper powder into a mixer, mixing and stirring;
step two: forming by adding the powder mixed in the step one into a press die by using a 100-ton mechanical press, and manually adding a tungsten contact to obtain a contact blank;
Step three: and D, using a mesh belt type sintering furnace for the contact blank prepared in the step two, wherein the temperature is controlled from presintering 450-.
Step four: shaping the contact obtained by sintering in the step three by using a 200-ton hydraulic press, and finishing by using a die to ensure the size requirement of the contact and improve the density, hardness and strength of the product;
step five: and (4) performing subsequent polishing treatment on the contact obtained in the step four by using special polishing solution and ceramic polishing material to finally obtain a finished product of the electric appliance switch contact, and finally packaging.
The further improvement lies in that: the atmosphere of the step three sintering is hydrogen protective atmosphere with the flow of 6-8M3/H。
The further improvement lies in that: the density of the contact blank formed in the second step is 9.5g/cm3。
The further improvement lies in that: the temperature cooling change interval of the three-mesh-belt type sintering furnace in the step is 80-40 ℃.
The invention has the beneficial effects that: the method selects copper powder and tungsten contacts, the copper powder is mixed, then the copper powder is pressed and formed, the tungsten contacts are added manually, then sintering, shaping and polishing are carried out to obtain the final finished product contact, the sintering melting point is improved, the conductivity of the contact is improved, the strength and the conductivity of the contact are improved by adding the tungsten contacts, and the sintering adopts the flow of 6-8M 3The hydrogen protective atmosphere of/H, thus guarantee tungsten contact and copper powder sintering fusion alloying, non-oxidation, improve product conductivity and life, and adopt polishing solution and ceramic polishing material to carry on the subsequent polishing treatment, the product is anti-oxidant after processing, the surface finish is improved, make the contact tip in the course of using, better contact and anti-oxidant, the conductivity of the whole contact tip is excellent, intensity hardness is good.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the present invention.
The embodiment provides a method for preparing an electric switch contact by using powder metallurgy copper-tungsten alloy, which comprises copper powder and a tungsten contact;
the preparation method comprises the following steps:
the method comprises the following steps: adding copper powder into a mixer, mixing and stirring;
step two: forming by adding the powder mixed in the step one into a press die by using a 100-ton mechanical press, and manually adding a tungsten contact to obtain a contact blank;
step three: and D, using a mesh belt type sintering furnace for the contact blank prepared in the step two, wherein the temperature is controlled from presintering 450-.
Step four: shaping the contact obtained by sintering in the step three by using a 200-ton hydraulic press, and finishing by using a die to ensure the size requirement of the contact and improve the density, hardness and strength of the product;
step five: and (4) performing subsequent polishing treatment on the contact obtained in the step four by using special polishing solution and ceramic polishing material to finally obtain a finished product of the electric appliance switch contact, and finally packaging.
The atmosphere of the step three sintering is hydrogen protective atmosphere with the flow of 6-8M3and/H. The density of the contact blank formed in the second step is 9.5g/cm3. The temperature cooling change interval of the three-mesh-belt type sintering furnace in the step is 80-40 ℃.
Copper powder and a tungsten contact are selected, the copper powder is mixed, then the copper powder is pressed and formed, the tungsten contact is added manually, then sintering, shaping and polishing are carried out to obtain a final finished contact, the sintering melting point is improved, the conductivity of the contact is improved, the strength and the conductivity of the contact are improved by adding the tungsten contact, and the sintering adopts the flow of 6-8M3The hydrogen protective atmosphere of/H, thus guarantee tungsten contact and copper powder sintering fusion alloying, non-oxidation, improve product conductivity and life, and adopt polishing solution and ceramic polishing material to carry on the subsequent polishing treatment, the product is anti-oxidant after processing, the surface finish is improved, make the contact tip in the course of using, better contact and anti-oxidant, the conductivity of the whole contact tip is excellent, intensity hardness is good.
Claims (4)
1. A method for preparing an electric switch contact by powder metallurgy copper-tungsten alloy is characterized by comprising the following steps: comprises copper powder and tungsten contacts;
the preparation method comprises the following steps:
the method comprises the following steps: adding copper powder into a mixer, mixing and stirring;
step two: forming by adding the powder mixed in the step one into a press die by using a 100-ton mechanical press, and manually adding a tungsten contact to obtain a contact blank;
step three: and D, using a mesh belt type sintering furnace for the contact blank prepared in the step two, wherein the temperature is controlled from presintering 450-.
Step four: shaping the contact obtained by sintering in the step three by using a 200-ton hydraulic press, and finishing by using a die to ensure the size requirement of the contact and improve the density, hardness and strength of the product;
step five: and (4) performing subsequent polishing treatment on the contact obtained in the step four by using special polishing solution and ceramic polishing material to finally obtain a finished product of the electric appliance switch contact, and finally packaging.
2. The method for preparing the contact of the electric switch by the powder metallurgy copper-tungsten alloy according to claim 1, wherein the method comprises the following steps: the atmosphere of the step three sintering is hydrogen protective atmosphere with the flow of 6-8M3/H。
3. The method for preparing the contact of the electric switch by the powder metallurgy copper-tungsten alloy according to claim 1, wherein the method comprises the following steps: the density of the contact blank formed in the second step is 9.5g/cm 3。
4. The method for preparing the contact of the electric switch by the powder metallurgy copper-tungsten alloy according to claim 1, wherein the method comprises the following steps: the temperature cooling change interval of the three-mesh-belt type sintering furnace in the step is 80-40 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010668911.7A CN111863488A (en) | 2020-07-13 | 2020-07-13 | Method for preparing electric appliance switch contact by powder metallurgy copper-tungsten alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010668911.7A CN111863488A (en) | 2020-07-13 | 2020-07-13 | Method for preparing electric appliance switch contact by powder metallurgy copper-tungsten alloy |
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| Publication Number | Publication Date |
|---|---|
| CN111863488A true CN111863488A (en) | 2020-10-30 |
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| CN202010668911.7A Pending CN111863488A (en) | 2020-07-13 | 2020-07-13 | Method for preparing electric appliance switch contact by powder metallurgy copper-tungsten alloy |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1701911A (en) * | 2004-05-24 | 2005-11-30 | 陈欢 | Method for producing tungsten point of copper rivet |
| CN1995438A (en) * | 2006-12-22 | 2007-07-11 | 株洲硬质合金集团有限公司 | Method for preparing elconite |
| CN101224498A (en) * | 2008-01-30 | 2008-07-23 | 西安理工大学 | Method for preparing wolfram and copper material contactor adopting W-CuO powder |
| CN103045895A (en) * | 2013-01-17 | 2013-04-17 | 上海大趋金属科技有限公司 | Electric contact material and preparation method thereof |
| CN103824710A (en) * | 2014-03-10 | 2014-05-28 | 温州中希电工合金有限公司 | Method for preparing silver-tungsten carbide contact material from silver-coated tungsten carbide powder and silver-tungsten carbide contact material |
| CN104362015A (en) * | 2014-11-28 | 2015-02-18 | 桂林电器科学研究院有限公司 | Preparation method of copper-tungsten contact material |
| CN106623947A (en) * | 2016-12-06 | 2017-05-10 | 中国西电电气股份有限公司 | Copper-tungsten contact and preparation method thereof |
| CN106978586A (en) * | 2017-04-01 | 2017-07-25 | 西安交通大学 | A kind of overlay coating processing method of arc-chutes copper tungsten electrical contact material |
| CN107671279A (en) * | 2017-09-13 | 2018-02-09 | 武汉理工大学 | The preparation method of tungsten copper silver carbon system composite |
| CN108080643A (en) * | 2017-12-14 | 2018-05-29 | 陈俊歧 | A kind of preparation method of the wear-resisting lubrication block of railway high voltage isolation switch contact powder metallurgy |
| CN108149043A (en) * | 2017-12-27 | 2018-06-12 | 西安理工大学 | A kind of method added ceramic phase titanium diboride and prepare CuW alloys |
| CN111230103A (en) * | 2018-11-29 | 2020-06-05 | 西安西电高压开关有限责任公司 | Preparation method of tungsten-copper alloy wear-resistant electrode |
-
2020
- 2020-07-13 CN CN202010668911.7A patent/CN111863488A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1701911A (en) * | 2004-05-24 | 2005-11-30 | 陈欢 | Method for producing tungsten point of copper rivet |
| CN1995438A (en) * | 2006-12-22 | 2007-07-11 | 株洲硬质合金集团有限公司 | Method for preparing elconite |
| CN101224498A (en) * | 2008-01-30 | 2008-07-23 | 西安理工大学 | Method for preparing wolfram and copper material contactor adopting W-CuO powder |
| CN103045895A (en) * | 2013-01-17 | 2013-04-17 | 上海大趋金属科技有限公司 | Electric contact material and preparation method thereof |
| CN103824710A (en) * | 2014-03-10 | 2014-05-28 | 温州中希电工合金有限公司 | Method for preparing silver-tungsten carbide contact material from silver-coated tungsten carbide powder and silver-tungsten carbide contact material |
| CN104362015A (en) * | 2014-11-28 | 2015-02-18 | 桂林电器科学研究院有限公司 | Preparation method of copper-tungsten contact material |
| CN106623947A (en) * | 2016-12-06 | 2017-05-10 | 中国西电电气股份有限公司 | Copper-tungsten contact and preparation method thereof |
| CN106978586A (en) * | 2017-04-01 | 2017-07-25 | 西安交通大学 | A kind of overlay coating processing method of arc-chutes copper tungsten electrical contact material |
| CN107671279A (en) * | 2017-09-13 | 2018-02-09 | 武汉理工大学 | The preparation method of tungsten copper silver carbon system composite |
| CN108080643A (en) * | 2017-12-14 | 2018-05-29 | 陈俊歧 | A kind of preparation method of the wear-resisting lubrication block of railway high voltage isolation switch contact powder metallurgy |
| CN108149043A (en) * | 2017-12-27 | 2018-06-12 | 西安理工大学 | A kind of method added ceramic phase titanium diboride and prepare CuW alloys |
| CN111230103A (en) * | 2018-11-29 | 2020-06-05 | 西安西电高压开关有限责任公司 | Preparation method of tungsten-copper alloy wear-resistant electrode |
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Application publication date: 20201030 |