CN106756204A - A kind of near-net-shape copper-chromium contact material preparation method - Google Patents
A kind of near-net-shape copper-chromium contact material preparation method Download PDFInfo
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- CN106756204A CN106756204A CN201611044872.3A CN201611044872A CN106756204A CN 106756204 A CN106756204 A CN 106756204A CN 201611044872 A CN201611044872 A CN 201611044872A CN 106756204 A CN106756204 A CN 106756204A
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- chromium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- 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
- B22F3/02—Compacting only
-
- 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
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0425—Copper-based alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/06—Alloys based on chromium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
Disclosed by the invention is a kind of near-net-shape copper-chromium contact material preparation method, and processing step is：The raw material selection compressing HIP sintering deoxidation of mixed powder；The present invention is using cold stamping die elder generation near-net-shape, then is densified by high temperature inert gas high temperature insostatic pressing (HIP), so as to remove mechanical processing process from while reaching properties of product requirement；By newly net forming blank high temperature insostatic pressing (HIP), conventional multiple pressure, resintering technique, optimize technique can be subtracted, and obtain consistency higher；Newly net forming can improve utilization rate of raw materials, reduce to copper, the waste of chromium material.
Description
Technical field
The present invention relates to powder metallurgy production technical field, it is specifically related to a kind of near-net-shape copper-chromium contact material and prepares
Method.
Background technology
High chrome contents copper chromium material with characteristics such as good conduction, anti-yaw damper, proof voltages high due to extensively should
For in middle pressure vacuum circuit-breaker arc extinguishing chamber contact material.With the development and progress of technology, vacuum circuit breaker is to miniaturization, intelligence
Direction can be changed to develop, therefore there is more preferable resistance fusion welding to contact material requirement.Powder metallurgic method copper-chromium contact material due to
Gradually it is applied to resistance fusion welding higher in low contact pressure vacuum interrupter.
In traditional powder metallurgical production technique, due to the difference such as copper, chromium two kinds of powder morphologies, fusing points, mixing is caused
Powder fluctuation is poor, it is difficult to one-shot forming high-compactness, thus using conventional first pressing, just burn, multiple pressure, resintering technique productions are into plate
Piece, then it is machined into final products.This conventional preparation technology has that technical process is long, waste of material big and machining
The problems such as difficulty is big.
The content of the invention
Present invention solves the technical problem that being that traditional powder metallurgy production is difficult to one-shot forming high-compactness, cause technique
Process is long, waste of material is big and the problems such as big mechanical processing difficulty.
Regarding to the issue above, the present invention develops a kind of new copper chromium contact preparation method, first near using cold stamping die
Net shaping, then be densified by high temperature inert gas high temperature insostatic pressing (HIP), add so as to remove machinery from while reaching properties of product requirement
Work process.Technical scheme is as follows：
A kind of near-net-shape copper-chromium contact material preparation method, comprises the following steps：
1) chromium powder from purity more than more than 99.5%, chromium powder granularity is 30-300 microns；It is more than from purity
99.5% copper powder, copper powder particle size is 30-200 microns；
2) copper, chromium powder are pressed 50:50 to 75:25 proportioning weigh with powder, and above proportioning fraction by weight is calculated；
3) copper, the chromium powder that will have been matched mix in ball mill, ball:Material ratio is 5:1 to 1:Between 5, the powder time is mixed in 2-
Between 10 hours；
4) near-net-shape mould of colding pressing is designed by contact finished size plus amount of contraction, mixed powder is filled into mould compacting
Into approximate final finished size, green compact are obtained；
5) green compact that will be suppressed, between Pressurized-heated to consistency reaches 95-99% in the hot isostatic press；
6) by contact blank removal surface oxidation after densification, you can obtain the finished product contact product of function admirable.
Further, in such scheme, step 4) described in pressing pressure between 700-1300Mpa, pressed compact is close
Degree is between 60-95%.
Further, in such scheme, step 5) described in hip temperature between 800-1070 DEG C, pressure
Between 30-100Mpa, soaking time is between 30min to 3h.
Further, in such scheme, in the step 5) in hot isostatic press in be filled with inert gas.
Further, the inert gas is one or more in helium, neon, argon gas.
The beneficial effects of the invention are as follows：The present invention can remove follow-up mechanical processing process from by newly net forming of colding pressing；
Newly net forming blank high temperature insostatic pressing (HIP), can subtract conventional multiple pressure, resintering technique, optimize technique, and obtain consistency higher；
Newly net forming can improve utilization rate of raw materials, reduce to copper, the waste of chromium material.
Specific embodiment
The present invention is further described in detail with reference to specific embodiment：
Embodiment 1
A kind of near-net-shape copper-chromium contact material preparation method, comprises the following steps：
1) chromium powder from purity more than more than 99.5%, chromium powder granularity is 30 microns；It is more than 99.5% from purity
Copper powder, copper powder particle size is 30 microns；
2) copper, chromium powder are pressed 50:50 to 75:25 proportioning weigh with powder, and above proportioning fraction by weight is calculated；
3) copper, the chromium powder that will have been matched mix in ball mill, ball:Material is than being 5:1, the powder time is mixed for 2 hours；
4) near-net-shape mould of colding pressing is designed by contact finished size plus amount of contraction, mixed powder is filled into mould compacting
Into approximate final finished size, pressing pressure is 700Mpa, and green density is 60%, obtains green compact；
5) green compact that will be suppressed, Pressurized-heated to consistency reaches 95%, hip temperature in hot isostatic press
It it is 800 DEG C, pressure is 30Mpa, soaking time is 30min, the gas being filled with hot isostatic press is inert gas argon gas；
6) by contact blank removal surface oxidation after densification, you can obtain the finished product contact product of function admirable.
Embodiment 2
A kind of near-net-shape copper-chromium contact material preparation method, comprises the following steps：
1) chromium powder from purity more than more than 99.5%, chromium powder granularity is 160 microns；It is more than 99.5% from purity
Copper powder, copper powder particle size is 160 microns；
2) copper, chromium powder are pressed 50:50 to 75:25 proportioning weigh with powder, and above proportioning fraction by weight is calculated；
3) copper, the chromium powder that will have been matched mix in ball mill, ball:Material is than being 1:1, the powder time is mixed for 6 hours；
4) near-net-shape mould of colding pressing is designed by contact finished size plus amount of contraction, mixed powder is filled into mould compacting
Into approximate final finished size, pressing pressure is 1000Mpa, and green density is 67%, obtains green compact；
5) green compact that will be suppressed, Pressurized-heated to consistency reaches 97%, hip temperature in hot isostatic press
It it is 935 DEG C, in 65Mpa, soaking time is 2h to pressure, the gas being filled with hot isostatic press is inert gas argon gas；
6) by contact blank removal surface oxidation after densification, you can obtain the finished product contact product of function admirable.
By newly net forming of colding pressing, follow-up mechanical processing process can be removed from；Newly net forming blank high temperature insostatic pressing (HIP), can subtract
Conventional multiple pressure, resintering technique, optimize technique are gone, and obtains consistency higher；Newly net forming can improve raw material profit
With rate, reduce to copper, the waste of chromium material.
Embodiment 3
A kind of near-net-shape copper-chromium contact material preparation method, comprises the following steps：
1) chromium powder from purity more than more than 99.5%, chromium powder granularity is 300 microns；It is more than 99.5% from purity
Copper powder, copper powder particle size is 200 microns；
2) copper, chromium powder are pressed 50:50 to 75:25 proportioning weigh with powder, and above proportioning fraction by weight is calculated；
3) copper, the chromium powder that will have been matched mix in ball mill, ball:Material is than being 1:5, the powder time is mixed for 10 hours；
4) near-net-shape mould of colding pressing is designed by contact finished size plus amount of contraction, mixed powder is filled into mould compacting
Into approximate final finished size, pressing pressure is 1300Mpa, and green density is 95%, obtains green compact；
5) green compact that will be suppressed, between Pressurized-heated to consistency reaches 95-99% in the hot isostatic press, heat etc. is quiet
Pressure temperature is 1070 DEG C, and pressure is 100Mpa, and soaking time is 3h, and the gas being filled with hot isostatic press is inert gas argon
Gas；
6) by contact blank removal surface oxidation after densification, you can obtain the finished product contact product of function admirable.
By newly net forming of colding pressing, follow-up mechanical processing process can be removed from；Newly net forming blank high temperature insostatic pressing (HIP), can subtract
Conventional multiple pressure, resintering technique, optimize technique are gone, and obtains consistency higher；Newly net forming can improve raw material profit
With rate, reduce to copper, the waste of chromium material.
By newly net forming of colding pressing, follow-up mechanical processing process can be removed from；Newly net forming blank high temperature insostatic pressing (HIP), can subtract
Conventional multiple pressure, resintering technique, optimize technique are gone, and obtains consistency higher；Newly net forming can improve raw material profit
With rate, reduce to copper, the waste of chromium material.
Although the present invention is described and illustrated with reference to its specific embodiment, it will be appreciated by those skilled in the art that
It can be variously modified without departing from the spirit and scope of the present invention, change and replaced.Therefore, the present invention
It is intended to only be limited by the scope of following claims and these claims should be as broadly as possible explained in rational degree.
Claims (5)
1. a kind of near-net-shape copper-chromium contact material preparation method, it is characterised in that comprise the following steps：
1) chromium powder from purity more than more than 99.5%, chromium powder granularity is 30-300 microns；It is more than 99.5% from purity
Copper powder, copper powder particle size is 30-200 microns；
2) copper, chromium powder are pressed (50:50) to (75:25) proportioning weigh with powder, and above proportioning fraction by weight is calculated；
3) copper, the chromium powder that will have been matched mix in ball mill, ball:Material ratio is (5:1) to (1:5) between, the powder time is mixed in 2-
Between 10 hours；
4) near-net-shape mould of colding pressing is designed by contact finished size plus amount of contraction, mixed powder is filled and is pressed into mould closely
Like final finished size, green compact are obtained；
5) green compact that will be suppressed, between Pressurized-heated to consistency reaches 95-99% in the hot isostatic press
6) by contact blank removal surface oxidation after densification, you can obtain finished product contact product.
2. a kind of near-net-shape copper-chromium contact material preparation method according to claim 1, it is characterised in that step 4) in
Between 700-1300Mpa, green density is between 60-95% for described pressing pressure.
3. a kind of near-net-shape copper-chromium contact material preparation method according to claim 1, it is characterised in that step 5) in
Between 800-1070 DEG C, soaking time is between 30min to 3h for described hip temperature.
4. a kind of near-net-shape copper-chromium contact material preparation method according to claim 1, it is characterised in that in the step
It is rapid 5) in hot isostatic press in be filled with inert gas.
5. a kind of near-net-shape copper-chromium contact material preparation method according to claim 1, it is characterised in that described is lazy
Property gas be helium, neon, argon gas in one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611044872.3A CN106756204A (en) | 2016-11-22 | 2016-11-22 | A kind of near-net-shape copper-chromium contact material preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611044872.3A CN106756204A (en) | 2016-11-22 | 2016-11-22 | A kind of near-net-shape copper-chromium contact material preparation method |
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| CN106756204A true CN106756204A (en) | 2017-05-31 |
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| CN201611044872.3A Pending CN106756204A (en) | 2016-11-22 | 2016-11-22 | A kind of near-net-shape copper-chromium contact material preparation method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931607A (en) * | 2017-11-17 | 2018-04-20 | 北京科技大学 | A kind of method using laser gain material technology manufacture chromiumcopper |
| CN109355524A (en) * | 2018-09-12 | 2019-02-19 | 河南长征电气有限公司 | A kind of copper-chromium contact material and preparation method thereof for vacuum circuit breaker |
| CN110468300A (en) * | 2019-07-29 | 2019-11-19 | 西安斯瑞先进铜合金科技有限公司 | A kind of preparation method of high-performance CuCr electrical contact |
| CN113388842A (en) * | 2021-05-19 | 2021-09-14 | 陕西斯瑞新材料股份有限公司 | Low-cost CuCr contact surface deoxidation auxiliary metal processing technology |
Citations (5)
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|---|---|---|---|---|
| US4810289A (en) * | 1988-04-04 | 1989-03-07 | Westinghouse Electric Corp. | Hot isostatic pressing of high performance electrical components |
| CN1183622A (en) * | 1996-01-29 | 1998-06-03 | 董元源 | Electric copper-based silverless contact composite material with high flow welding resistance |
| CN1483535A (en) * | 2003-06-30 | 2004-03-24 | 哈尔滨工业大学 | Method for preparing copper base electrode powder deformation compound material |
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| CN105369052A (en) * | 2015-11-10 | 2016-03-02 | 东华大学 | SiC-Cu electric contact material and preparation method thereof |
-
2016
- 2016-11-22 CN CN201611044872.3A patent/CN106756204A/en active Pending
Patent Citations (5)
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|---|---|---|---|---|
| US4810289A (en) * | 1988-04-04 | 1989-03-07 | Westinghouse Electric Corp. | Hot isostatic pressing of high performance electrical components |
| CN1183622A (en) * | 1996-01-29 | 1998-06-03 | 董元源 | Electric copper-based silverless contact composite material with high flow welding resistance |
| CN1483535A (en) * | 2003-06-30 | 2004-03-24 | 哈尔滨工业大学 | Method for preparing copper base electrode powder deformation compound material |
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Non-Patent Citations (1)
| Title |
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| 尹天文: "《低压电器技术手册》", 30 September 2014, 机械工业出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931607A (en) * | 2017-11-17 | 2018-04-20 | 北京科技大学 | A kind of method using laser gain material technology manufacture chromiumcopper |
| CN109355524A (en) * | 2018-09-12 | 2019-02-19 | 河南长征电气有限公司 | A kind of copper-chromium contact material and preparation method thereof for vacuum circuit breaker |
| CN110468300A (en) * | 2019-07-29 | 2019-11-19 | 西安斯瑞先进铜合金科技有限公司 | A kind of preparation method of high-performance CuCr electrical contact |
| CN113388842A (en) * | 2021-05-19 | 2021-09-14 | 陕西斯瑞新材料股份有限公司 | Low-cost CuCr contact surface deoxidation auxiliary metal processing technology |
| CN113388842B (en) * | 2021-05-19 | 2023-03-21 | 陕西斯瑞新材料股份有限公司 | Low-cost CuCr contact surface deoxidation auxiliary metal processing technology |
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Application publication date: 20170531 |