CN106623947B - A kind of copper tungsten contact and preparation method thereof - Google Patents
A kind of copper tungsten contact and preparation method thereof Download PDFInfo
- Publication number
- CN106623947B CN106623947B CN201611111801.0A CN201611111801A CN106623947B CN 106623947 B CN106623947 B CN 106623947B CN 201611111801 A CN201611111801 A CN 201611111801A CN 106623947 B CN106623947 B CN 106623947B
- Authority
- CN
- China
- Prior art keywords
- copper
- skeleton
- tungsten
- preparation
- minutes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/025—Composite material having copper as the basic material
-
- 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
-
- 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
- B22F7/062—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 involving the connection or repairing of preformed parts
- B22F2007/066—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 involving the connection or repairing of preformed parts using impregnation
Abstract
The invention discloses a kind of copper tungsten contact and preparation method thereof, i.e. W skeleton is suppressed in short transverse using segmentation, coats active element in W skeleton uniform cross before sintering, then the preparation of W skeleton is realized by integral sintered method.Include the following steps：Contact W skeleton is several parts different by being highly divided into vertical direction, segmentation die mould is carried out, die mould uniformly coats appropriate active element in alloy briquet contact surface after the completion, each briquet is stacked in crucible in order, appropriate copper billet is put around briquet.Crucible is positioned in sintering furnace, copper-tungsten contact blank can be obtained by certain technological parameter sintering, fabricated part finally can be obtained according to dimensioned.
Description
【Technical field】
The present invention relates to contact preparing technical field, more particularly to a kind of tungsten contact used for high-voltage switch and preparation method thereof.
【Background technology】
Please refer to Fig.1 with shown in Fig. 2, previous tubaeform contact as shown in Figure 1, primary structure is CuW+CuCr (Cu), this
The mode that the processing of class contact uses is suppressed for W skeletons, is sintered, infiltration copper billet obtains CuW alloys, through CuW alloys and CuCr
Alloy is integral sintered to be can be obtained.With the continuous increase of high-voltage switch gear product voltage class and electric current, to the core of switch product
Center portion part copper tungsten contact proposes more, higher requirement.Significant change has occurred in the structure of current such contact, is mainly reflected in
The contact generally CuW alloys.Such structure proposes challenge to the preparation of contact, W skeleton is suppressed, if directly
Flared structure is suppressed, then conventional moulded cannot achieve；If using directly taken by contact maximum gauge the method for molding into
Row compacting, then occur that W skeleton is inside and outside, notable difference occurs in upper and lower different parts consistency, while in the infiltration stage, copper liquid is equal
Even infiltration is also more difficult, can not so ensure the use of contact.In addition, even if using mould pressing method direct pressing cylinder
Shape skeleton is obtaining flared structure by machining, so will have larger waste to raw material and machining.
Tubaeform contact is solved in tungsten it is really necessary to provide a kind of layering compacting, integral sintered preparation method based on this
The problem of uniform compacting, the infiltration of copper and machining of skeleton etc..
【Invention content】
The purpose of the present invention is to provide a kind of copper tungsten contacts and preparation method thereof, solve the bone of the larger copper tungsten of ratio of height to diameter
Prepared by frame, greatly improve the utilization rate of such part raw material, solve that in this class formation contact skeleton preparation process mould cannot be used
The limitation of pressure.
To achieve the above objectives, the present invention, which adopts the following technical scheme that, is achieved：
W skeleton is resolved into different height by a kind of preparation method of copper tungsten contact according to the ratio of height to diameter of contact W skeleton
W skeleton segmentation compacting, after the completion of compacting, different W skeletons is put into crucible in sequence, copper is put into inside crucible
Then crucible is put into sintering furnace and is sintered by block.
The W skeleton green compact interface of different height is before being put into crucible, and contact surface is coated with activator, in infiltration copper
Before block fusing, the W skeleton of different height is integrally formed skeleton by activator activated sintering.
The activator is nickel powder.
The quality that activator is coated on unit area is less than the 1% of tungsten.
The W skeleton suppressed respectively is prepared after mixing forming agent, induction copper powder and tungsten powder.
The forming agent is paraffin, and the induction copper powder is copper powder, and in sintering process, volatilization does not remain the paraffin,
The copper powder guides the copper billet of fusing to penetrate into W skeleton after being melted during infiltration.
The copper billet is fine copper, chromium-copper or chromium-zirconium-copper.
Sintering schedule is：200 DEG C are warming up within 40 minutes from room temperature, keeps the temperature 30 minutes；900 DEG C are warming up within 30 minutes, heat preservation
10 minutes；1050 DEG C are warming up within 10 minutes, keeps the temperature 30 minutes, is warming up within 10 minutes 1350 DEG C, 120 minutes are kept the temperature, then with stove
It is cooling.
A kind of copper tungsten contact, the copper tungsten contact generally copper-tungsten, in the copper-tungsten, the mass fraction of copper is 15~
35%.
Compared with the existing technology, the present invention has the following advantages：The present invention is when preparing CuW alloys, in the system of W skeleton
In the standby stage, the skeleton by the way that W skeleton to be resolved into different height in the height direction carries out segmentation compacting, after the completion of compacting,
Different W skeletons is stacked together again.Before stacking, in the suitable nickel powder of region coating that W skeleton contacts with each other, appropriate nickel
The coating of powder will improve the metallurgical binding ability at skeleton interface.The method for taking segmentation to suppress solves larger diameter, height
Skeleton can not use the limitation of molding.
【Description of the drawings】
Fig. 1 is original structure of contact terminal schematic diagram；
Fig. 2 is existing contact schematic diagram；
Fig. 3 present invention suppresses W skeleton and is segmented pressing structure
Fig. 4 present invention prepares W skeleton preparation process；
Structure after Fig. 5 CuW alloys machinings of the present invention.
【Specific implementation mode】
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
It please refers to shown in Fig. 2 and Fig. 2~5, a kind of preparation method of copper tungsten contact includes the following steps：
(1) a certain amount of paraffin, copper powder and tungsten powder are sufficiently mixed, appropriateness dries；
(2) W skeleton is divided into different equal points according to the ratio of height to diameter of contact W skeleton to suppress；
(3) active element coating is carried out on the W skeleton contact surface suppressed；
(4) W skeleton sequence is put into crucible, appropriate copper billet is put into inside crucible, crucible is then put into sintering furnace
It is interior；200 DEG C are heated within 40 minutes from room temperature, keeps the temperature 30 minutes；30 minutes to 900 DEG C, keep the temperature 10 minutes；It is warming up within 10 minutes
1050 DEG C, 30 minutes are kept the temperature, is warming up within 10 minutes 1350 DEG C, keeps the temperature 120 minutes, then furnace cooling obtains copper tungsten contact hair
Base.
(5) it is machined out according to accessory size, it is for use to obtain fabricated part.
In the mixed powder stage of step (1), paraffin is forming agent, and copper powder is induction copper powder；Paraffin is in heating and insulating process
Middle volatilization does not remain, and copper powder guides the copper billet of fusing to penetrate into W skeleton after being melted during infiltration.W skeleton green compact interface exists
Before the fusing of infiltration copper billet, the nickel powder activated sintering coated by interface is integrally formed skeleton.On W skeleton contact surface, unit plane
The quality that nickel powder is coated in product is less than the 1% of tungsten.The copper billet ingredient is fine copper, chromium-copper or chromium-zirconium-copper.
Copper tungsten contact obtained generally copper-tungsten according to the method for the present invention, in the alloy, the mass fraction of copper is
15~35%.
The present invention is when preparing CuW alloys, in the preparatory phase of W skeleton, by the height direction decomposing W skeleton
Segmentation compacting is carried out at the skeleton of different height, is stacked together after the completion of compacting, then by different W skeletons.Before stacking,
In the suitable nickel powder of region coating that W skeleton contacts with each other, the coating of appropriate nickel powder will improve the metallurgical binding energy at skeleton interface
Power.The method for taking segmentation to suppress solves larger diameter, the skeleton of height can not use the limitation being molded.
The present invention is suppressed using the structure of hollow ring, is so greatly carried when preparing CuW alloy skeletons
The service efficiency of raw material is risen；Meanwhile when using molding, the skeleton of hollow-core construction is conducive to the consistency of skeleton compactness.
Claims (7)
1. a kind of preparation method of copper tungsten contact, which is characterized in that resolved into W skeleton according to the ratio of height to diameter of contact W skeleton
The W skeleton segmentation compacting of different height, after the completion of compacting, different W skeletons is put into crucible in sequence, in crucible
Portion is put into copper billet, and then crucible is put into sintering furnace and is sintered；The W skeleton green compact interface of different height before being put into crucible,
Its contact surface is coated with activator, before the fusing of infiltration copper billet, the W skeleton of different height by activator activated sintering at
For overall skeleton, the quality of coating activator is less than the 1% of tungsten on unit area；Sintering schedule is：It heats up within 40 minutes from room temperature
To 200 DEG C, 30 minutes are kept the temperature；900 DEG C are warming up within 30 minutes, keeps the temperature 10 minutes；1050 DEG C are warming up within 10 minutes, keeps the temperature 30 points
Clock is warming up to 1350 DEG C for 10 minutes, keeps the temperature 120 minutes, then furnace cooling.
2. a kind of preparation method of copper tungsten contact according to claim 1, it is characterised in that：The activator is nickel powder.
3. a kind of preparation method of copper tungsten contact according to claim 1, it is characterised in that：Activation is coated on unit area
The quality of agent is less than the 1% of tungsten.
4. a kind of preparation method of copper tungsten contact according to claim 1, it is characterised in that：The tungsten bone suppressed respectively
Frame is prepared after mixing forming agent, induction copper powder and tungsten powder.
5. a kind of preparation method of copper tungsten contact according to claim 4, it is characterised in that：The forming agent is paraffin,
The induction copper powder is copper powder, and the paraffin is in sintering process, and volatilization does not remain, after the copper powder melts during infiltration
The copper billet of guiding fusing penetrates into W skeleton.
6. a kind of preparation method of copper tungsten contact according to claim 1, it is characterised in that：The copper billet is fine copper, chromium
Copper or chromium-zirconium-copper.
7. copper tungsten contact prepared by a kind of preparation method of copper tungsten contact according to any one of claim 1 to 6, special
Sign is：The copper tungsten contact generally copper-tungsten, in the copper-tungsten, the mass fraction of copper is 15~35%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611111801.0A CN106623947B (en) | 2016-12-06 | 2016-12-06 | A kind of copper tungsten contact and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611111801.0A CN106623947B (en) | 2016-12-06 | 2016-12-06 | A kind of copper tungsten contact and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106623947A CN106623947A (en) | 2017-05-10 |
| CN106623947B true CN106623947B (en) | 2018-10-30 |
Family
ID=58819491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611111801.0A Active CN106623947B (en) | 2016-12-06 | 2016-12-06 | A kind of copper tungsten contact and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106623947B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112908734B (en) * | 2019-12-04 | 2024-01-26 | 西安西电高压开关有限责任公司 | High-current breaker contact and preparation method thereof |
| CN112908733B (en) * | 2019-12-04 | 2024-01-26 | 西安西电高压开关有限责任公司 | Alloy arc contact, preparation method and application thereof |
| CN111863488A (en) * | 2020-07-13 | 2020-10-30 | 安徽恒均粉末冶金科技股份有限公司 | Method for preparing electric appliance switch contact by powder metallurgy copper-tungsten alloy |
| CN112530724B (en) * | 2020-10-19 | 2023-09-08 | 陕西斯瑞新材料股份有限公司 | Method for manufacturing electron beam welding copper-tungsten contact by using tungsten powder |
| CN113593992B (en) * | 2021-07-09 | 2023-09-15 | 陕西斯瑞新材料股份有限公司 | CuW-CuCr integral electrical contact with ultralow chromium content and preparation method thereof |
| CN115821187B (en) * | 2022-12-20 | 2023-12-26 | 厦门钨业股份有限公司 | Tungsten copper material and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353258A (en) * | 2008-08-07 | 2009-01-28 | 沈阳中科超硬磨具磨削研究所 | CBN grinding wheel of low temperature vitrified bond and preparation technique thereof |
| CN101699591A (en) * | 2009-10-30 | 2010-04-28 | 西安福莱电工合金有限公司 | Copper-tungsten/copper-alloy integrated contact and preparation method thereof |
| CN104715940A (en) * | 2013-12-16 | 2015-06-17 | 通用电气公司 | Monolithic contact system and method of forming |
-
2016
- 2016-12-06 CN CN201611111801.0A patent/CN106623947B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353258A (en) * | 2008-08-07 | 2009-01-28 | 沈阳中科超硬磨具磨削研究所 | CBN grinding wheel of low temperature vitrified bond and preparation technique thereof |
| CN101699591A (en) * | 2009-10-30 | 2010-04-28 | 西安福莱电工合金有限公司 | Copper-tungsten/copper-alloy integrated contact and preparation method thereof |
| CN104715940A (en) * | 2013-12-16 | 2015-06-17 | 通用电气公司 | Monolithic contact system and method of forming |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106623947A (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106623947B (en) | A kind of copper tungsten contact and preparation method thereof | |
| CN106498205B (en) | A kind of manufacture method of the CuCr alloys of large scale high-compactness high uniformity | |
| CN105132726B (en) | A kind of copper-chromium contact material suitable for contactor and preparation method thereof | |
| CN105018768B (en) | High-performance copper chromium contactor material and preparing method thereof | |
| JP5539159B2 (en) | High density molding method and high density molding apparatus for mixed powder. | |
| CN105087981B (en) | Preparation method for welding-resistant ablation-resistant Cu-nano Al2O3 Cr contact material | |
| CN107498047A (en) | A kind of tungsten-copper composite material and preparation method thereof | |
| US20150061188A1 (en) | High-density molding device and high-density molding method for mixed powder | |
| CN104707931A (en) | Manufacturing method for large high-temperature alloy disk-type die forging parts | |
| WO2011003225A1 (en) | Preparation method for silver metal oxide made electric contact material | |
| CN103352136A (en) | Copper-based contact material and manufacturing process thereof | |
| CN101135011A (en) | New method for preparing AgSnO2 electrical contact material | |
| CN108941306A (en) | A kind of amorphous alloy steam explosion impact thermo shaping method | |
| JP5881816B2 (en) | High density molding method and high density molding apparatus for mixed powder | |
| CN111118332A (en) | Dynamic internal oxidation method for silver-based metal oxide electrical contact material | |
| CN112501464B (en) | Silver-nickel composite material and preparation method thereof | |
| CN114160787A (en) | Manufacturing method of non-shrinkage tungsten framework | |
| CN101628328B (en) | New preparation method of AgMgNi alloy conducting ring | |
| CN101880807A (en) | Production process capable of improving mechanical properties of high specific gravity tungsten alloy lever | |
| CN105695782B (en) | A kind of preparation method of siluer metal oxide electric contact material | |
| CN101886185A (en) | Method for preparing copper-chrome alloy casting blank | |
| US20150118096A1 (en) | High-density molding device and high-density molding method for mixed powder | |
| JP5881821B2 (en) | High density molding method and high density molding apparatus for mixed powder | |
| CN110499435A (en) | A kind of silver-based electric contact material and preparation method thereof | |
| CN101787453A (en) | Vacuum circuit-breaking switch contact material preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210629 Address after: 741018 dongshili Industrial Park, Qinzhou District, Tianshui City, Gansu Province Patentee after: Tianshui Xidian the Great Wall Alloy Co.,Ltd. Patentee after: CHINA XD ELECTRIC Co.,Ltd. Address before: 710075 Shaanxi city of Xi'an province high tech Zone No. 7 Tang Xing Lu Patentee before: CHINA XD ELECTRIC Co.,Ltd. |