CN110468300A - A kind of preparation method of high-performance CuCr electrical contact - Google Patents
A kind of preparation method of high-performance CuCr electrical contact Download PDFInfo
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- CN110468300A CN110468300A CN201910690241.6A CN201910690241A CN110468300A CN 110468300 A CN110468300 A CN 110468300A CN 201910690241 A CN201910690241 A CN 201910690241A CN 110468300 A CN110468300 A CN 110468300A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000005245 sintering Methods 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 33
- 238000000498 ball milling Methods 0.000 claims abstract description 21
- 238000002791 soaking Methods 0.000 claims description 31
- 239000011812 mixed powder Substances 0.000 claims description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 18
- 238000000465 moulding Methods 0.000 claims description 18
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 12
- 239000011651 chromium Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000000748 compression moulding Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 238000007731 hot pressing Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000007790 solid phase Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004663 powder metallurgy Methods 0.000 abstract description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 238000001764 infiltration Methods 0.000 description 6
- 230000008595 infiltration Effects 0.000 description 6
- 230000004927 fusion Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- GXDVEXJTVGRLNW-UHFFFAOYSA-N [Cr].[Cu] Chemical compound [Cr].[Cu] GXDVEXJTVGRLNW-UHFFFAOYSA-N 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000002679 ablation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000000754 repressing effect Effects 0.000 description 1
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
- 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
-
- 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
- C22C9/00—Alloys based on copper
-
- 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
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Abstract
The invention discloses a kind of preparation methods of high-performance CuCr electrical contact, comprising the following steps: stock；Ball milling；It is dry；Compacting；Sintering.The preparation method that the present invention uses can reach performance requirement using simple technique, it is in sintering process with the difference of prior powder metallurgy method using solid-phase sintering mode, premium quality product can not only be produced, at the same also can process flow shorten, so as to shorten manufacturing cost.
Description
Technical field
The present invention relates to electrical contact preparation technical fields, and in particular to a kind of preparation method of high-performance CuCr electrical contact.
Background technique
Copper-chromium contact material is that one of powerful vacuum switch contact material is pressed in currently the most important ones.It is domestic at present external
The method for producing copper chromium contact has powder metallurgic method, molten infiltration method, fusion casting.
Powder metallurgic method: directly uniformly mixing a certain proportion of Cu powder and Cr powder, lower selected sintering after repressed molding
At a temperature of carry out solid-phase sintering, then repressing and re-sintering is carried out, to obtain CuCr contact material.
Molten infiltration method: Cr powder or the Cr powder for being mixed with a small amount of Cu powder and other constituent elements are suppressed, infiltration skeleton is sintered into, then exists
Higher than at a temperature of Cu fusing point by Cu infiltration into Cr skeleton, formed CuCr contact material.
Fusion casting: crome metal grain and copper billet are added in vacuum melting furnace, and melting forms CuCr contact material.
Powder sintering, infiltration method and vacuum casting method have the shortcomings that different, specific manifestation at present are as follows:
Powder metallurgic method: stomata easy to form keeps contact material consistency low, and mechanical strength is low, and compressive resistance difference etc. lacks
It falls into.
Molten infiltration method: two phase segregation of Cu, Cr is serious in contact, is also easy to produce shrinkage cavity in material, and it is molten that contact material consistency is low etc.
Seep defect.
Fusion casting: there may be macroscopical stomata, it is mingled with and the defects of component segregation, the tensile strength of material is high, and contact is anti-
Melting welding performance is poor.
Therefore, the copper-chromium contact material that even tissue, pressure resistance and anti-melting welding how is prepared is of great significance.
Summary of the invention
Against the above technical problems, the present invention provides the high-performance CuCr electricity of a kind of even tissue, pressure resistance and anti-melting welding
The preparation method of contact.
The technical scheme is that a kind of preparation method of high-performance CuCr electrical contact, comprising the following steps:
Step 1: stock
Weight percentage weighs each element percentage composition in raw material are as follows: Cu's 68~73%, Cr 27~32%
Required copper powder and chromium powder are spare；
Step 2: ball milling
Ball-milling treatment is carried out to spare copper powder and chromium powder using planetary ball mill and obtains mixed powder；Wherein, Ball-milling Time
For 6~12h, ratio of grinding media to material 5:1,110~150r/min of rotational speed of ball-mill；
Step 3: dry
Mixed powder after ball milling is dried in vacuo 15~20h under the conditions of 55~85 DEG C；
Step 4: compacting
Mixed powder after drying is pressed and molded, briquet is obtained；Specifically: the mixed powder after drying is first put into mould
It is intracavitary, it is ensured that after getting togather upper die and lower die after mixed powder compacting, mold to be put into hot pressing board, sets hot press running parameter
Are as follows: 200 ± 10 DEG C of temperature, external pressure 150MPa, 60~90s of molding time carry out mixed powder to carry out pre-embossed molding,
Form just clamp dog；Then carrying out the compression moulding that condition is molding 800~1000MPa of unit pressure to first clamp dog is briquet,
Seeking briquet density is 8.0~10.0g/cm3；
Step 5: sintering
The briquet that compacting is completed is packed into after being sintered in vacuum sintering furnace and obtains high-performance CuCr electrical contact.
Further, copper powder described in step 1 uses electrolytic copper powder；Electrolytic copper powder is free of field trash, can effectively meet
The performance requirement of CuCr electrical contact.
Further, chromium powder described in step 1 uses granularity for 45~75 μm of chromium powder；Select the chromium powder of the particle size range
It can promote the uniformity mixed with electrolytic copper powder.
Further, step 4 carry out condition be molding 800~1000MPa of unit pressure compacting when pressure maintaining 10~
20s；It can effectively guarantee that molding briquet can be demoulded completely, and avoid too long or too short curing time to base
The performance of block has an impact；It is compared with the traditional method, this method does not add forming agent, selects the density blank during the sintering process
Shrinkage is small to be basically unchanged shape, and it is small to reserve machining allowance, and stock utilization is high.
Further, sintering described in step 5 specifically comprises the processes of: it is heated to 300~500 DEG C, soaking time 120~
240min, continues to be heated to 700~800 DEG C, soaking time 60~90min, it is finally heated extremely
900~1050 DEG C, 120~300min of soaking time, room temperature is cooled to the furnace after the completion of heating and is come out of the stove；Using solid phase
Sintering, for sintering temperature close to liquidus point, sintering process does not generate the dissolution between tissue other than the tissue change in addition to pure metal
With new constituent or cenotype.
Further, sintering described in step 5 specifically comprises the processes of: it is heated to 300~500 DEG C, soaking time 120~
240min continues to be heated to 700~800 DEG C, 60~90min of soaking time under the conditions of the rate of heat addition is 30~50 DEG C/min,
Then 900~1050 DEG C, 120~300min of soaking time are heated under the conditions of the rate of heat addition is 50~100 DEG C/min, heating
Room temperature is cooled to the furnace after the completion to come out of the stove；Powder particle during the sintering process is on the one hand enabled to by the way of gradient-heated
Between bonding can with the tablecloth of temperature increase gradually adapt to, cause sintering when be uniformly heated.
More optimizedly, sintering described in step 5 specifically comprises the processes of: is filled with argon gas, pressure into vacuum sintering furnace before sintering
For 0.20~0.25MP a, then will be vacuumized inside high-temperature vacuum sintering furnace；Then with the rate of heat addition of 100 DEG C/min from room temperature
300~500 DEG C, 120~240min of soaking time are heated to, continues to be heated under the conditions of the rate of heat addition is 30~50 DEG C/min
700~800 DEG C, 60~90min of soaking time, then 900 are heated under the conditions of the rate of heat addition is 50~100 DEG C/min~
1050 DEG C, 120~300min of soaking time, room temperature is cooled to the furnace after the completion of heating and is come out of the stove；Argon gas can be as the guarantor of alloy
Gas is protected, can be avoided cracked the problem of leading to fracture in briquet sintering.
Compared with prior art the invention has the benefit that the preparation method that the present invention uses uses simple technique i.e.
Performance that can be achieved requirement, has been effectively saved preparation cost；The present invention is with the difference of prior powder metallurgy method sintered
Cheng Caiyong solid-phase sintering mode, can not only produce premium quality product, at the same also can process flow shorten, so as to shorten system
Cause this；And raw material can promote the uniformity mixed with electrolytic copper powder using 45~75 μm of chromium powder, promote the electricity touching of preparation
Head has the uniform advantage of metallographic structure；Prepared contact performance is excellent, meets GB/T 26867--2011 standard requirements,
Middle gas oxygen content≤0.05%, nitrogen content≤0.003%, density >=8.15g/cm3, conductivity >=28MS/m, hardness 75-
The contact of 100HB, preparation have preferable ablation resistance and excellent resistance fusion welding energy.
Detailed description of the invention
Fig. 1 is process flow chart of the invention；
Fig. 2 is the shape appearance figure that the CuCr electrical contact prepared using the embodiment of the present invention 1 amplifies 100 times under the microscope；
Fig. 3 is the shape appearance figure that the CuCr electrical contact prepared using the embodiment of the present invention 6 amplifies 100 times under the microscope；
Specific embodiment
A kind of embodiment 1: preparation method of high-performance CuCr electrical contact, comprising the following steps:
Step 1: stock
Weight percentage weighs each element percentage composition in raw material are as follows: the required copper powder of Cu 68%, Cr 32%
It is spare with chromium powder；
Step 2: ball milling
Ball-milling treatment is carried out to spare copper powder and chromium powder using planetary ball mill and obtains mixed powder；Wherein, Ball-milling Time
For 6h, ratio of grinding media to material 5:1, rotational speed of ball-mill 110r/min；
Step 3: dry
Mixed powder after ball milling is dried in vacuo 15h under the conditions of 55 DEG C；
Step 4: compacting
Mixed powder after drying is pressed and molded, briquet is obtained；Specifically: the mixed powder after drying is first put into mould
It is intracavitary, it is ensured that after getting togather upper die and lower die after mixed powder compacting, mold to be put into hot pressing board, sets hot press running parameter
Are as follows: 190 DEG C of temperature, external pressure 150MPa, molding time 60s carry out mixed powder to carry out pre-embossed molding, form just system
Block；Then carrying out the compression moulding that condition is molding unit pressure 800MPa, pressure maintaining 10s to first clamp dog is briquet, it is desirable that briquet
Density is 8.0g/cm3；
Step 5: sintering
Briquet that compacting is completed is packed into vacuum sintering furnace and is sintered, sintering process: being heated to 300 DEG C, when heat preservation
Between 120min, continue to be heated to 700 DEG C, soaking time 60min, finally heated to 900 DEG C, soaking time 120min has been heated
Room temperature is cooled to the furnace after to come out of the stove.
A kind of embodiment 2: preparation method of high-performance CuCr electrical contact, comprising the following steps:
Step 1: stock
Weight percentage weighs each element percentage composition in raw material are as follows: the required copper powder of Cu 70%, Cr 30%
It is spare with chromium powder；
Step 2: ball milling
Ball-milling treatment is carried out to spare copper powder and chromium powder using planetary ball mill and obtains mixed powder；Wherein, Ball-milling Time
For 8h, ratio of grinding media to material 5:1, rotational speed of ball-mill 130r/min；
Step 3: dry
Mixed powder after ball milling is dried in vacuo 18h under the conditions of 75 DEG C；
Step 4: compacting
Mixed powder after drying is pressed and molded, briquet is obtained；Specifically: the mixed powder after drying is first put into mould
It is intracavitary, it is ensured that after getting togather upper die and lower die after mixed powder compacting, mold to be put into hot pressing board, sets hot press running parameter
Are as follows: 200 DEG C of temperature, external pressure 150MPa, molding time 80s carry out mixed powder to carry out pre-embossed molding, form just system
Block；Then carrying out the compression moulding that condition is molding unit pressure 900MPa, pressure maintaining 15s to first clamp dog is briquet, it is desirable that briquet
Density is 9.0g/cm3；
Step 5: sintering
Briquet that compacting is completed is packed into vacuum sintering furnace and is sintered, sintering process: being heated to 400 DEG C, when heat preservation
Between 180min, continue to be heated to 750 DEG C, soaking time 75min, finally heated to 1000 DEG C, soaking time 200min has been heated
Room temperature is cooled to the furnace after to come out of the stove.
A kind of embodiment 3: preparation method of high-performance CuCr electrical contact, comprising the following steps:
Step 1: stock
Weight percentage weighs each element percentage composition in raw material are as follows: the required copper powder of Cu 73%, Cr 27%
It is spare with chromium powder；
Step 2: ball milling
Ball-milling treatment is carried out to spare copper powder and chromium powder using planetary ball mill and obtains mixed powder；Wherein, Ball-milling Time
For 12h, ratio of grinding media to material 5:1, rotational speed of ball-mill 150r/min；
Step 3: dry
Mixed powder after ball milling is dried in vacuo 20h under the conditions of 85 DEG C；
Step 4: compacting
Mixed powder after drying is pressed and molded, briquet is obtained；Specifically: the mixed powder after drying is first put into mould
It is intracavitary, it is ensured that after getting togather upper die and lower die after mixed powder compacting, mold to be put into hot pressing board, sets hot press running parameter
Are as follows: 210 DEG C of temperature, external pressure 150MPa, molding time 90s carry out mixed powder to carry out pre-embossed molding, form just system
Block；Then carrying out the compression moulding that condition is molding unit pressure 1000MPa, pressure maintaining 20s to first clamp dog is briquet, it is desirable that briquet
Density is 10.0g/cm3；
Step 5: sintering
Briquet that compacting is completed is packed into vacuum sintering furnace and is sintered, sintering process: being heated to 500 DEG C, when heat preservation
Between 240min, continue to be heated to 800 DEG C, soaking time 90min, finally heated to 1050 DEG C, soaking time 300min has been heated
Room temperature is cooled to the furnace after to come out of the stove.
Embodiment 4: unlike the first embodiment: sintering described in step 3 specifically comprises the processes of: be heated to 300 DEG C, heat preservation
Time 120min continues to be heated to 700 DEG C under the conditions of the rate of heat addition is 30 DEG C/min, then soaking time 60min is being heated
Rate is heated to 900 DEG C, soaking time 120min under the conditions of being 50 DEG C/min, cool to room temperature with the furnace after the completion of heating and come out of the stove.
Embodiment 5: as different from Example 3: being heated to 500 DEG C, soaking time 240min, be 50 in the rate of heat addition
DEG C/min under the conditions of continue to be heated to 800 DEG C, soaking time 90min, then the rate of heat addition be 100 DEG C/min under the conditions of heat
To 1050 DEG C, soaking time 300min, room temperature is cooled to the furnace after the completion of heating and is come out of the stove
Embodiment 6: unlike the first embodiment: sintering described in step 3 specifically comprises the processes of: to vacuum-sintering before sintering
Argon gas is filled in furnace, pressure is 0.20MP a, then will be vacuumized inside high-temperature vacuum sintering furnace；Then adding with 100 DEG C/min
Hot rate is heated to 300 DEG C, soaking time 120min from room temperature, continues to be heated under the conditions of the rate of heat addition is 30 DEG C/min
700 DEG C, soaking time 60min, 900 DEG C, soaking time 120min then are heated under the conditions of the rate of heat addition is 50 DEG C/min,
Room temperature is cooled to the furnace after the completion of heating to come out of the stove.
Embodiment 7: as different from Example 3: sintering described in step 3 specifically comprises the processes of: to vacuum-sintering before sintering
Argon gas is filled in furnace, pressure is 0.25MP a, then will be vacuumized inside high-temperature vacuum sintering furnace；Then adding with 100 DEG C/min
Hot rate is heated to 500 DEG C, soaking time 240min from room temperature, continues to be heated under the conditions of the rate of heat addition is 50 DEG C/min
800 DEG C, soaking time 90min, 1050 DEG C then are heated under the conditions of the rate of heat addition is 100 DEG C/min, soaking time
300min cools to room temperature with the furnace after the completion of heating and comes out of the stove.
Experimental example: CuCr electrical contact prepared by Examples 1 to 7 is passed through into " type approval test of 12KV, 25KA short circuit interruption "
It can verify that and pass through, test design parameter: voltage rating 12KV, rated short circuit drop-out current 25KA.Therefore, prepared by the present invention
CuCr electrical contact have preferable ablation resistance and excellent resistance fusion welding energy.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify to technical solution documented by previous embodiment or equivalent replacement of some of the technical features；And
These are modified or replaceed, the spirit and model of technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (7)
1. a kind of preparation method of high-performance CuCr electrical contact, which comprises the following steps:
Step 1: stock
Weight percentage weighs each element percentage composition in raw material are as follows: Cu68~73%, the required copper of Cr27~32%
Powder and chromium powder are spare；
Step 2: ball milling
Ball-milling treatment is carried out to spare copper powder and chromium powder using planetary ball mill and obtains mixed powder；Wherein, Ball-milling Time be 6~
12h, ratio of grinding media to material 5:1,110~150r/min of rotational speed of ball-mill；
Step 3: dry
Mixed powder after ball milling is dried in vacuo 15~20h under the conditions of 55~85 DEG C；
Step 4: compacting
Mixed powder after drying is pressed and molded, briquet is obtained；Specifically: the mixed powder after drying is first put into die cavity
It is interior, it is ensured that after getting togather upper die and lower die after mixed powder compacting, mold to be put into hot pressing board, sets hot press running parameter
Are as follows: 200 ± 10 DEG C of temperature, external pressure 150MPa, 60~90s of molding time carry out mixed powder to carry out pre-embossed molding,
Form just clamp dog；Then carrying out the compression moulding that condition is molding 800~1000MPa of unit pressure to first clamp dog is briquet,
Seeking briquet density is 8.0~10.0g/cm3；
Step 5: sintering
The briquet that compacting is completed is packed into after being sintered in vacuum sintering furnace and obtains high-performance CuCr electrical contact.
2. a kind of preparation method of high-performance CuCr electrical contact as described in claim 1, which is characterized in that copper described in step 1
Powder uses electrolytic copper powder.
3. a kind of preparation method of high-performance CuCr electrical contact as described in claim 1, which is characterized in that chromium described in step 1
Powder uses granularity for 45~75 μm of chromium powder.
4. a kind of preparation method of high-performance CuCr electrical contact as described in claim 1, which is characterized in that step 4 carries out item
Part is 10~20s of pressure maintaining when forming the compacting of 800~1000MPa of unit pressure.
5. a kind of preparation method of high-performance CuCr electrical contact as described in claim 1, which is characterized in that burnt described in step 5
Knot specifically comprises the processes of: be heated to 300~500 DEG C, 120~240min of soaking time, continue to be heated to 700~800 DEG C, heat preservation
60~90min of time, is cooled to the furnace after the completion of heating by finally heated to 900~1050 DEG C, 120~300min of soaking time
Room temperature is come out of the stove.
6. a kind of preparation method of high-performance CuCr electrical contact as claimed in claim 5, which is characterized in that burnt described in step 5
Knot specifically comprises the processes of: be heated to 300~500 DEG C, 120~240min of soaking time, be 30~50 DEG C/min in the rate of heat addition
Under the conditions of continue to be heated to 700~800 DEG C, 60~90min of soaking time, then the rate of heat addition be 50~100 DEG C/min item
It is heated to 900~1050 DEG C, 120~300min of soaking time under part, cools to room temperature with the furnace after the completion of heating and comes out of the stove.
7. a kind of preparation method of high-performance CuCr electrical contact as claimed in claim 5, which is characterized in that burnt described in step 5
Knot carries out in vacuum sintering furnace.
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2019
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| JPS5471375A (en) * | 1977-05-27 | 1979-06-07 | Mitsubishi Electric Corp | Preparation of contact for vacuum breaker |
| CN102171780A (en) * | 2008-10-31 | 2011-08-31 | 日本Ae帕瓦株式会社 | Electrode material for vacuum circuit breaker and method for producing same |
| EP2193862A1 (en) * | 2008-12-08 | 2010-06-09 | Umicore AG & Co. KG | Use of CuCr waste shavings for the production of CuCr contact blanks |
| CN105132726A (en) * | 2015-07-31 | 2015-12-09 | 陕西斯瑞工业有限责任公司 | Copper-chromium contact material suitable for contactor and preparing method of copper-chromium contact material |
| CN106756204A (en) * | 2016-11-22 | 2017-05-31 | 陕西斯瑞新材料股份有限公司 | A kind of near-net-shape copper-chromium contact material preparation method |
| CN108559867A (en) * | 2018-05-15 | 2018-09-21 | 北京科技大学 | A kind of high conductivity CuCr30 contact materials and preparation method thereof |
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