CN1096322C - Verticle sintering method for copper/tungsten-chromium copper integral probe - Google Patents
Verticle sintering method for copper/tungsten-chromium copper integral probe Download PDFInfo
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- CN1096322C CN1096322C CN98112840A CN98112840A CN1096322C CN 1096322 C CN1096322 C CN 1096322C CN 98112840 A CN98112840 A CN 98112840A CN 98112840 A CN98112840 A CN 98112840A CN 1096322 C CN1096322 C CN 1096322C
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- copper
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- chromium
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Abstract
The present invention relates to a vertical sintering method for integral CuW-CrCu contacts, which belongs to the sintering technique for integral CuW-CrCu contacts and solves the technical problems of the prior art, such as nonuniform structure and performance in circumference direction of the integral CuW-CrCu contacts, nonuniform contacting deformation, large electric ablation in use, deep holes on workblanks, low process product rate, low binding strength of a CuW head and a CrCu tail, etc. A forming die in which the CuW head and the CrCu tail are loaded is vertically put in the cavity of a sintering furnace for integral sintering, and the joint surface of the CuW head and the CrCu tail is effectively treated by reduction atmosphere. The present invention is used for sintering all CuW-CrCu contacts.
Description
The present invention relates to a kind of copper tungsten---chromium-copper integral contact sintering method, especially copper tungsten---the vertical sintering method of chromium-copper integral contact.
Before the present invention finishes, the present inventor's sintered copper tungsten---the chromium-copper integral contact adopts horizontal sintering method, the shaping mould horizontally-inclined is positioned in the horizontal continuous fritting furnace, along the circumferential direction structure property is inhomogeneous to cause integral contact, inhomogeneous as hardness, the fingertip distortion is inhomogeneous, promptly enables usefulness, and in use contact electricity scaling loss is big; The blank shrinkage cavity is darker, and product yield is low; Processing can't be effectively reduced in the bad control of reducing atmosphere in sintering process to the faying face of copper tungsten head and chromium-copper tail copper, causes bond strength low.
The objective of the invention is to, a kind of copper tungsten is provided---the vertical sintering method of chromium-copper integral contact.Adopt that this sintering method is shaped copper tungsten---the chromium-copper integral contact is along the circumferential direction organized, performance uniformity is good, and consumptive material is few, and can be in sintering process the faying face of copper tungsten head and chromium-copper tail copper be effectively reduced processing, purification faying face, bond strength height.
Sintering method disclosed by the invention be the shaping mould that will copper tungsten head and chromium-copper tail copper be housed be vertically placed on carry out in the sintering equipment furnace chamber integrally sintered.
Concrete steps are as follows:
1. copper tungsten head is placed the shaping mould bottom, put into chromium-copper tail copper then, again shaping mould is vertically put into the sintering equipment furnace chamber, heat with eddy-current heating or resistance heated mode under inert atmosphere protection the back;
2. when treating that furnace temperature rises to 950～980 ℃, with reducing atmosphere the faying face of copper tungsten head and chromium-copper tail copper is reduced and to handle 10～30 minutes;
3. under inert atmosphere protection, furnace temperature is risen to 1250～1280 ℃ of sintering 1～2 hour;
4. furnace temperature is cooled to 250～300 ℃, with copper tungsten---the chromium-copper integral contact takes out.
Compared with the prior art the present invention has following advantage:
1. because of shaping mould is vertically placed in the sintering equipment furnace chamber, so copper tungsten head and chromium-copper tail copper are along circumference tissue, performance profile good uniformity; The fingertip distortion is little, and contact electricity scaling loss is little in the use; The blank shrinkage cavity is little, and the product yield height has reduced material consumption;
2. because of adopting reducing atmosphere that copper tungsten head and chromium-copper tail copper faying face are effectively reduced, faying face is purified, improved bond strength.
Accompanying drawing is a copper tungsten---the structural representation of the vertical sintering equipment of chromium-copper integral contact.Wherein 1 is body of heater, and 2 is load coil, and 3 is copper tungsten head, and 4 is chromium-copper tail copper, and 5 is shaping mould, and 6 are shrinkage cavity, and 7 is bell.
Specific embodiments of the present invention is described below in conjunction with the accompanying drawings:
Embodiment 1
The CuW70-QCr0.5 integral contact is pressed following technology sintering:
1. CuW70 copper tungsten head is placed the shaping mould bottom, put into QCr0.5 chromium-copper tail copper then, again shaping mould is vertically put into the sintering furnace chamber, and under the nitrogen atmosphere protection, use eddy-current heating;
2. treat that furnace temperature rises to 980 ℃, with hydrogen the faying face of CuW70 copper tungsten head and QCr0.5 chromium-copper tail copper is reduced and handled 20 minutes;
3. under the nitrogen atmosphere protection, furnace temperature is risen to 1250 ℃ of sintering 1.5 hours;
4. furnace temperature is cooled to 300 ℃, the CuW70-QCr0.5 integral contact is taken out.
Embodiment 2
The CuW80-QCr0.5 integral contact is pressed following technology sintering:
1. CuW80 copper tungsten head is placed the shaping mould bottom, put into QCr0.5 chromium-copper tail copper then, again shaping mould is vertically put into the sintering furnace chamber, eddy-current heating is used in the back under the nitrogen atmosphere protection;
2. treat that furnace temperature rises to 960 ℃, with hydrogen the faying face of CuW80 copper tungsten head and QCr0.5 chromium-copper tail copper is reduced and handled 30 minutes;
3. under the nitrogen atmosphere protection, furnace temperature is risen to 1260 ℃, sintering 1.5 hours;
4. furnace temperature is cooled to 300 ℃, the CuW80-QCr0.5 integral contact is taken out.
Claims (1)
1. the sintering method of copper tungsten-chromium-copper integral contact, its step is as follows:
A. copper tungsten head is placed the bottom of shaping mould [5], put into chromium-copper tail copper [4] then, again shaping mould [5] is vertically put into the sintering equipment furnace chamber, heat with eddy-current heating or resistance heated mode under inert atmosphere protection the back;
When treating that b. furnace temperature rises to 950～980 ℃, with reducing atmosphere the faying face of copper tungsten head [3] and chromium-copper tail copper [4] is reduced and to handle 10～30 minutes;
C. under inert atmosphere protection, furnace temperature is risen to 1250～1280 ℃, sintering 1～2 hour;
D. furnace temperature is cooled to 250～300 ℃, copper tungsten-chromium-copper integral contact is taken out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98112840A CN1096322C (en) | 1998-03-23 | 1998-03-23 | Verticle sintering method for copper/tungsten-chromium copper integral probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98112840A CN1096322C (en) | 1998-03-23 | 1998-03-23 | Verticle sintering method for copper/tungsten-chromium copper integral probe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1229704A CN1229704A (en) | 1999-09-29 |
| CN1096322C true CN1096322C (en) | 2002-12-18 |
Family
ID=5222635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98112840A Expired - Fee Related CN1096322C (en) | 1998-03-23 | 1998-03-23 | Verticle sintering method for copper/tungsten-chromium copper integral probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1096322C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102034626B (en) * | 2010-12-17 | 2012-11-07 | 段沛林 | Method for manufacturing flake-like arc contact finger |
| CN102386000A (en) * | 2011-11-29 | 2012-03-21 | 浙江开关厂有限公司 | Self-elastic contact |
| CN104505286B (en) * | 2014-12-04 | 2017-03-01 | 西安理工大学 | A kind of preparation method of CuW/CuCr composite |
| CN105252217B (en) * | 2015-10-21 | 2017-06-09 | 福州博力达机电有限公司 | A kind of preparation method of tungsten-copper alloy/stainless steel integral material |
| CN106736259B (en) * | 2016-11-11 | 2018-12-14 | 陕西斯瑞新材料股份有限公司 | A kind of production method of low cost looped network moving knife contact |
| CN111299594A (en) * | 2019-11-29 | 2020-06-19 | 安徽恒均粉末冶金科技股份有限公司 | Preparation method of copper-tungsten petal contact |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108080A (en) * | 1984-12-13 | 1986-06-10 | 三菱电机有限公司 | Contacts for vacuum-break switches |
| US5330702A (en) * | 1989-05-31 | 1994-07-19 | Siemens Aktiengesellschaft | Process for producing CuCr contact pieces for vacuum switches as well as an appropriate contact piece |
| WO1997014163A1 (en) * | 1995-10-10 | 1997-04-17 | Abb Patent Gmbh | Process and device for making a contact |
-
1998
- 1998-03-23 CN CN98112840A patent/CN1096322C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108080A (en) * | 1984-12-13 | 1986-06-10 | 三菱电机有限公司 | Contacts for vacuum-break switches |
| US5330702A (en) * | 1989-05-31 | 1994-07-19 | Siemens Aktiengesellschaft | Process for producing CuCr contact pieces for vacuum switches as well as an appropriate contact piece |
| WO1997014163A1 (en) * | 1995-10-10 | 1997-04-17 | Abb Patent Gmbh | Process and device for making a contact |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1229704A (en) | 1999-09-29 |
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