CN108907205A - A kind of manufacturing process of brush in composite material - Google Patents
A kind of manufacturing process of brush in composite material Download PDFInfo
- Publication number
- CN108907205A CN108907205A CN201810717597.XA CN201810717597A CN108907205A CN 108907205 A CN108907205 A CN 108907205A CN 201810717597 A CN201810717597 A CN 201810717597A CN 108907205 A CN108907205 A CN 108907205A
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- raw material
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000002131 composite material Substances 0.000 title claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 41
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 18
- 239000010426 asphalt Substances 0.000 claims abstract description 17
- 239000003245 coal Substances 0.000 claims abstract description 17
- 239000008187 granular material Substances 0.000 claims abstract description 17
- 239000013590 bulk material Substances 0.000 claims abstract description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000571 coke Substances 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims abstract description 12
- 239000010439 graphite Substances 0.000 claims abstract description 7
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 7
- 229910052786 argon Inorganic materials 0.000 claims abstract description 6
- 238000005087 graphitization Methods 0.000 claims abstract description 6
- 230000014759 maintenance of location Effects 0.000 claims abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 22
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 21
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000004939 coking Methods 0.000 claims description 5
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 239000011261 inert gas Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035924 thermogenesis 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
- 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
- B22F7/02—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 layers
-
- B22F1/0003—
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/12—Manufacture of brushes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Motor Or Generator Current Collectors (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a kind of manufacturing process of brush in composite material, include the following steps：S1, raw material；S2, graphite powder, coke blacking, curing tungsten powder, modified coal asphalt are according to parts by weight than for 1-1.5:1-2:0.2-0.4:The ratio of 0.6-1 is uniformly mixed, and is then heated to 120 DEG C -150 DEG C, is subsequently poured into and the particle that partial size is 20-40 millimeters is made in pelletizer, obtains basal granule；Basal granule is put into roaster, protection gas is passed through, 2600 DEG C of -3000 DEG C of holdings 4-6 hours is heated to, makes its graphitization, then crushes to partial size and is not more than 5 millimeters of particle；S3, preparation work layer raw material, transition zone raw material, welding layer raw material；S4, by working lining raw material, transition zone raw material, welding layer raw material respectively according to thickness ratio be 15-20：6-8:The thickness of 3-4 is successively laid in graphite grinding tool, then passes to argon gas as protection gas at 850 DEG C -950 DEG C, pressure is hot-forming, retention time 20-30min under the pressure of 30-45MPa, obtains bulk material；S5, above-mentioned bulk material is processed into brush base.
Description
Technical field
The present invention relates to a kind of brushes, more particularly to a kind of manufacturing process of brush in composite material.
Background technique
Brush（Brush）It is an important component of motor, is responsible for conducting between rotary part and stationary parts
Electric current.Because relatively multi-purpose graphite is made, therefore also referred to as carbon brush.
Silver-colored brush material is aerospace instrument system, automatically controls in Xu Tong and motor, electrical and circuit device
Essential electric elements are responsible for the vital tasks such as transmitting electric energy, electric signal, contact and disjunction circuit.Therefore, right at present
The low wear rate and long service life of silver-colored brush, the performance requirements such as low resistance, low friction thermogenesis performance, low electric noise are higher.
Although existing product has had the product that can reach above-mentioned standard, its manufacturing cost is higher, complex process,
It just directly results in that finished product is on the high side, is unfavorable for the market competition of producer.
Therefore, applicant proposes a kind of manufacturing process of brush in composite material, manufactures composite material by new technique
Brush, and end properties are poor unlike main product on the market.
Summary of the invention
In view of the above drawbacks of the prior art, technical problem to be solved by the invention is to provide a kind of composite material electricity
The manufacturing process of brush.
To achieve the above object, the present invention provides a kind of manufacturing process of brush in composite material, include the following steps：
S1, raw material, modified coal asphalt, softening point are 90-100 DEG C, and coking value is >=55%, ash content≤0.20%, fineness when room temperature
For 100-120 mesh；
Graphite powder, granularity are not more than 2 μm；
Coke blacking, 100-120 mesh；
Curing tungsten powder, fineness are 100-120 mesh；
Silver powder, fineness are 90-100 mesh, purity 99.9%；
Electrolytic copper powder, fineness are 90-100 mesh, purity 99.9%；
Copper powder, fineness are 90-100 mesh, purity 99.9%；
S2, graphite powder, coke blacking, curing tungsten powder, modified coal asphalt are according to parts by weight than for 1-1.5:1-2:0.2-0.4:
The ratio of 0.6-1 is uniformly mixed；Dehydrated alcohol can be added when mixing and carry out wet mixing, air-dried after the completion of mixing and obtain mixing carbon
Powder；
Mixing carbon dust is heated to 120 DEG C -150 DEG C, so that modified coal asphalt softens, is subsequently poured into pelletizer and partial size is made is
20-40 millimeters of particle obtains basal granule；
Basal granule is put into roaster, protection gas is passed through（Inert gas or nitrogen）, it is heated to 2600 DEG C of -3000 DEG C of holding 4-6
Hour, make its graphitization, then crushes to partial size and be not more than 5 millimeters of particle；
S3, by silver powder, electrolytic copper powder, curing tungsten powder, S2 treated basal granule according to parts by weight than for 3-4:3-4:1-2:
The ratio of 0.5-1 is uniformly mixed, and obtains working lining raw material；
By silver powder, curing tungsten powder according to parts by weight than for 1-2:The ratio of 0.2-0.6 is uniformly mixed, and it is former to obtain transition zone
Material；
By silver powder, copper powder according to parts by weight than for 3-4：The ratio of 2-3 is uniformly mixed, and obtains welding layer raw material；
S4, by working lining raw material, transition zone raw material, welding layer raw material respectively according to thickness ratio be 15-20：6-8:The thickness of 3-4
It is successively laid in graphite grinding tool, then passes to argon gas as protection gas at 850 DEG C -950 DEG C, pressure is the pressure of 30-45MPa
Under hot-forming, retention time 20-30min, obtain bulk material, it is preferable that the bulk material having a size of：20㎜*30
㎜*25㎜；
S5, above-mentioned bulk material is processed into brush base.
The beneficial effects of the invention are as follows：Present invention process is simple, and manufacturing cost is relatively low, and end properties are not weaker than in the market
Mainstream finished product, even better than import finished product.Therefore, bigger profit margin can be brought for enterprise, improves the competition of enterprise
Power.
Specific embodiment
Below with reference to embodiment, the invention will be further described：
Embodiment one
A kind of manufacturing process of brush in composite material, includes the following steps：
S1, raw material, modified coal asphalt, softening point are 90-100 DEG C, and coking value is >=55%, ash content≤0.20%, fineness when room temperature
For 100-120 mesh；
Graphite powder, granularity are not more than 2 μm；
Coke blacking, 100-120 mesh；
Curing tungsten powder, fineness are 100-120 mesh；
Silver powder, fineness are 90-100 mesh, purity 99.9%；
Electrolytic copper powder, fineness are 90-100 mesh, purity 99.9%；
Copper powder, fineness are 90-100 mesh, purity 99.9%；
S2, graphite powder, coke blacking, curing tungsten powder, modified coal asphalt are according to parts by weight than being 1:2:0.8:0.4：1 ratio
It is uniformly mixed；Dehydrated alcohol is added when mixing and carries out wet mixing, is air-dried after the completion of mixing and obtains mixing carbon dust；
Mixing carbon dust is heated to 130 DEG C, so that modified coal asphalt softens, being subsequently poured into pelletizer and partial size is made is 30 millimeters
Particle, obtain basal granule；
Basal granule is put into roaster, protection gas is passed through（Inert gas or nitrogen）, it is heated to 2800 DEG C and is kept for 5 hours, makes it
Then graphitization crushes to partial size and is not more than 3 millimeters of particle；
S3, by silver powder, electrolytic copper powder, curing tungsten powder, S2 treated basal granule according to parts by weight than being 4:4:1.5:0.8
Ratio is uniformly mixed, and obtains working lining raw material；
By silver powder, curing tungsten powder according to parts by weight than being 1.5:0.5 ratio is uniformly mixed, and obtains transition zone raw material；
By silver powder, copper powder according to parts by weight than being 3.5：3 ratio is uniformly mixed, and obtains welding layer raw material；
S4, by working lining raw material, transition zone raw material, welding layer raw material respectively according to thickness ratio be 18：7:4 thickness is successively laid with
In graphite grinding tool, argon gas is then passed to as protection gas at 900 DEG C, it is hot-forming under the pressure that pressure is 35MPa, when holding
Between 30min, obtain bulk material；
S5, above-mentioned bulk material is processed into brush base.
Embodiment two
A kind of manufacturing process of brush in composite material, includes the following steps：
S1, raw material, modified coal asphalt, softening point are 90-100 DEG C, and coking value is >=55%, ash content≤0.20%, fineness when room temperature
For 100-120 mesh；
Graphite powder, granularity are not more than 2 μm；
Coke blacking, 100-120 mesh；
Curing tungsten powder, fineness are 100-120 mesh；
Silver powder, fineness are 90-100 mesh, purity 99.9%；
Electrolytic copper powder, fineness are 90-100 mesh, purity 99.9%；
Copper powder, fineness are 90-100 mesh, purity 99.9%；
S2, graphite powder, coke blacking, curing tungsten powder, modified coal asphalt are according to parts by weight than being 1.5:1.5:0.3:1 ratio
It is uniformly mixed；Dehydrated alcohol can be added when mixing and carry out wet mixing, air-dried after the completion of mixing and obtain mixing carbon dust；
Mixing carbon dust is heated to 140 DEG C, so that modified coal asphalt softens, being subsequently poured into pelletizer and partial size is made is 35 millimeters
Particle, obtain basal granule；
Basal granule is put into roaster, protection gas is passed through（Inert gas or nitrogen）, it is heated to 3000 DEG C and is kept for 4 hours, makes it
Then graphitization crushes to partial size and is not more than 3 millimeters of particle；
S3, by silver powder, electrolytic copper powder, curing tungsten powder, S2 treated basal granule according to parts by weight than being 3:4:2:1 ratio
Example is uniformly mixed, and obtains working lining raw material；
By silver powder, curing tungsten powder according to parts by weight than being 2:0.5 ratio is uniformly mixed, and obtains transition zone raw material；
By silver powder, copper powder according to parts by weight than being 3.5：2 ratio is uniformly mixed, and obtains welding layer raw material；
S4, by working lining raw material, transition zone raw material, welding layer raw material respectively according to thickness ratio be 20：6:3 thickness is successively laid with
In graphite grinding tool, argon gas is then passed to as protection gas at 930 DEG C, it is hot-forming under the pressure that pressure is 40MPa, when holding
Between 25min, obtain bulk material；
S5, bulk material made of S4 is processed into brush base.
Embodiment three
A kind of manufacturing process of brush in composite material, includes the following steps：
S1, raw material, modified coal asphalt, softening point are 90-100 DEG C, and coking value is >=55%, ash content≤0.20%, fineness when room temperature
For 100-120 mesh；
Graphite powder, granularity are not more than 2 μm；
Coke blacking, 100-120 mesh；
Curing tungsten powder, fineness are 100-120 mesh；
Silver powder, fineness are 90-100 mesh, purity 99.9%；
Electrolytic copper powder, fineness are 90-100 mesh, purity 99.9%；
Copper powder, fineness are 90-100 mesh, purity 99.9%；
S2, graphite powder, coke blacking, curing tungsten powder, modified coal asphalt are according to parts by weight than being 1.2:1.8:0.4:1 ratio
It is uniformly mixed；Dehydrated alcohol can be added when mixing and carry out wet mixing, air-dried after the completion of mixing and obtain mixing carbon dust；
Mixing carbon dust is heated to 150 DEG C, so that modified coal asphalt softens, being subsequently poured into pelletizer and partial size is made is 25 millimeters
Particle, obtain basal granule；
Basal granule is put into roaster, protection gas is passed through（Inert gas or nitrogen）, it is heated to 2700 DEG C and is kept for 6 hours, makes it
Then graphitization crushes to partial size and is not more than 5 millimeters of particle；
S3, by silver powder, electrolytic copper powder, curing tungsten powder, S2 treated basal granule according to parts by weight than being 4:3.2:1.8: 1
Ratio be uniformly mixed, obtain working lining raw material；
By silver powder, curing tungsten powder according to parts by weight than being 1.2:0.4 ratio is uniformly mixed, and obtains transition zone raw material；
By silver powder, copper powder according to parts by weight than being 3.5：2 ratio is uniformly mixed, and obtains welding layer raw material；
S4, by working lining raw material, transition zone raw material, welding layer raw material respectively according to thickness ratio be 16：6:4 thickness is successively laid with
In graphite grinding tool, argon gas is then passed to as protection gas at 950 DEG C, it is hot-forming under the pressure that pressure is 45MPa, when holding
Between 20min；
S5, above-mentioned bulk material is processed into brush base.
Place is not described in detail by the present invention, is the well-known technique of those skilled in the art.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (4)
1. a kind of manufacturing process of brush in composite material, which is characterized in that include the following steps：
S1, raw material, modified coal asphalt, graphite powder, coke blacking, curing tungsten powder, silver powder, electrolytic copper powder, copper powder；
S2, graphite powder, coke blacking, curing tungsten powder, modified coal asphalt are according to parts by weight than for 1-1.5:1-2:0.2-0.4:
The ratio of 0.6-1 is uniformly mixed, and is then heated to 120 DEG C -150 DEG C, so that modified coal asphalt softens, is subsequently poured into pelletizer
The particle that partial size is 20-40 millimeters is made, obtains basal granule；
Basal granule is put into roaster, protection gas is passed through, 2600 DEG C of -3000 DEG C of holdings 4-6 hours is heated to, makes its graphitization,
Then it crushes to partial size and is not more than 5 millimeters of particle；
S3, by silver powder, electrolytic copper powder, curing tungsten powder, S2 treated basal granule according to parts by weight than for 3-4:3-4:1-2:
The ratio of 0.5-1 is uniformly mixed, and obtains working lining raw material；
By silver powder, curing tungsten powder according to parts by weight than for 1-2:The ratio of 0.2-0.6 is uniformly mixed, and it is former to obtain transition zone
Material；
By silver powder, copper powder according to parts by weight than for 3-4：The ratio of 2-3 is uniformly mixed, and obtains welding layer raw material；
S4, by working lining raw material, transition zone raw material, welding layer raw material respectively according to thickness ratio be 15-20：6-8:The thickness of 3-4
It is successively laid in graphite grinding tool, then passes to argon gas as protection gas at 850 DEG C -950 DEG C, pressure is the pressure of 30-45MPa
Under hot-forming, retention time 20-30min, obtain bulk material；
S5, above-mentioned bulk material is processed into brush base.
2. manufacturing process as described in claim 1, which is characterized in that the requirement of each raw material is as follows in S1：
Modified coal asphalt, softening point are 90-100 DEG C, and coking value is >=55%, ash content≤0.20%, and fineness is 100-120 when room temperature
Mesh；
Graphite powder, granularity are not more than 2 μm；
Coke blacking, 100-120 mesh；
Curing tungsten powder, fineness are 100-120 mesh；
Silver powder, fineness are 90-100 mesh, purity 99.9%；
Electrolytic copper powder, fineness are 90-100 mesh, purity 99.9%；
Copper powder, fineness are 90-100 mesh, purity 99.9%.
3. manufacturing process as described in claim 1, which is characterized in that dehydrated alcohol is added when mixing in S2 and carries out wet mixing, mixes
It is air-dried after the completion of closing and obtains mixing carbon dust.
4. manufacturing process as described in claim 1, which is characterized in that bulk material described in S4 having a size of：20㎜*30
㎜*25㎜。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810717597.XA CN108907205B (en) | 2018-07-03 | 2018-07-03 | Manufacturing process of composite material electric brush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810717597.XA CN108907205B (en) | 2018-07-03 | 2018-07-03 | Manufacturing process of composite material electric brush |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108907205A true CN108907205A (en) | 2018-11-30 |
| CN108907205B CN108907205B (en) | 2020-07-28 |
Family
ID=64424647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810717597.XA Active CN108907205B (en) | 2018-07-03 | 2018-07-03 | Manufacturing process of composite material electric brush |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108907205B (en) |
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|---|---|---|---|---|
| CN1874080A (en) * | 2006-05-27 | 2006-12-06 | 合肥工业大学 | Brush in composite material of carbon fiber and graphite based on silver |
| DE102006051678A1 (en) * | 2006-10-30 | 2008-05-15 | Schunk Modultechnik Gmbh | Sliding contact i.e. carbon brush, has two layers e.g. sliding surface-sided running layer and sliding surface lying layer, with surfaces turned towards each other, where lying layer consists of resistor material with resistance process |
| CN102263349A (en) * | 2011-06-10 | 2011-11-30 | 陕西科技大学 | Electric brush made of copper-graphite composite material and used for motor |
| CN102882101A (en) * | 2012-10-26 | 2013-01-16 | 海门市通达碳业有限公司 | Novel electric brush production technology |
| CN102904145A (en) * | 2012-10-26 | 2013-01-30 | 海门市通达碳业有限公司 | Production process of wear-resistant electric brush |
| CN103972758A (en) * | 2014-03-05 | 2014-08-06 | 台州昊泽碳制品有限公司 | Low-noise motor and electric brush combination |
| CN105130436A (en) * | 2015-08-25 | 2015-12-09 | 自贡东新电碳有限责任公司 | Preparation method for high-resistivity carbon black-based electrographite electric brush material |
| CN105236983A (en) * | 2015-10-20 | 2016-01-13 | 大同新成新材料股份有限公司 | Method for preparing high-speed train pantograph carbon sliding plate through new process |
| CN106505391A (en) * | 2015-09-08 | 2017-03-15 | 苏州东南碳制品有限公司 | A kind of material for preparing passenger car start and stop carbon brush used for electric engine |
-
2018
- 2018-07-03 CN CN201810717597.XA patent/CN108907205B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1874080A (en) * | 2006-05-27 | 2006-12-06 | 合肥工业大学 | Brush in composite material of carbon fiber and graphite based on silver |
| DE102006051678A1 (en) * | 2006-10-30 | 2008-05-15 | Schunk Modultechnik Gmbh | Sliding contact i.e. carbon brush, has two layers e.g. sliding surface-sided running layer and sliding surface lying layer, with surfaces turned towards each other, where lying layer consists of resistor material with resistance process |
| CN102263349A (en) * | 2011-06-10 | 2011-11-30 | 陕西科技大学 | Electric brush made of copper-graphite composite material and used for motor |
| CN102882101A (en) * | 2012-10-26 | 2013-01-16 | 海门市通达碳业有限公司 | Novel electric brush production technology |
| CN102904145A (en) * | 2012-10-26 | 2013-01-30 | 海门市通达碳业有限公司 | Production process of wear-resistant electric brush |
| CN103972758A (en) * | 2014-03-05 | 2014-08-06 | 台州昊泽碳制品有限公司 | Low-noise motor and electric brush combination |
| CN105130436A (en) * | 2015-08-25 | 2015-12-09 | 自贡东新电碳有限责任公司 | Preparation method for high-resistivity carbon black-based electrographite electric brush material |
| CN106505391A (en) * | 2015-09-08 | 2017-03-15 | 苏州东南碳制品有限公司 | A kind of material for preparing passenger car start and stop carbon brush used for electric engine |
| CN105236983A (en) * | 2015-10-20 | 2016-01-13 | 大同新成新材料股份有限公司 | Method for preparing high-speed train pantograph carbon sliding plate through new process |
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| Publication number | Publication date |
|---|---|
| CN108907205B (en) | 2020-07-28 |
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