CN105821234A - Preparation method for graphene-reinforcing silver-based sliding electrical contact material - Google Patents
Preparation method for graphene-reinforcing silver-based sliding electrical contact material Download PDFInfo
- Publication number
- CN105821234A CN105821234A CN201610252090.2A CN201610252090A CN105821234A CN 105821234 A CN105821234 A CN 105821234A CN 201610252090 A CN201610252090 A CN 201610252090A CN 105821234 A CN105821234 A CN 105821234A
- Authority
- CN
- China
- Prior art keywords
- graphene
- silver
- contact material
- based sliding
- sliding contact
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/06—Alloys based on silver
-
- 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
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
-
- 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
-
- 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
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
-
- 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
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- 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
Abstract
The invention discloses a preparation method for a graphene-reinforcing silver-based sliding electrical contact material, and belongs to the field of silver-based electrical alloy materials. The graphene-reinforcing silver-based sliding electrical contact material comprises the following chemical ingredients in percentage by mass: 0.04-1.5% of graphene, 5.0-15% of Ce, 0.5-2.0% of La and the balance Ag. The preparation method comprises the following steps: carrying out ball-milling mixing on silver rare-earth alloy powder and graphene according to the above-mentioned ingredient proportions to prepare a composite powder, carrying out cold isostatic pressing processing on the composite powder to obtain an ingot blank, and then carrying out hot isostatic pressing sintering and hot extrusion on the ingot blank to obtain a bar material or a wire material made of the graphene-reinforcing silver-based sliding electrical contact material. Because a graphene-reinforcing phase exists in a silver matrix, the graphene-reinforcing silver-based sliding electrical contact material provided by the invention has more excellent wear resistance and arc erosion resistance compared with other silver-based electrical contact materials.
Description
Technical field
The present invention relates to a kind of Graphene and strengthen the preparation method of silver-based sliding contact material, belong to money base electrical alloy Material Field.
Background technology
Silver-based sliding contact material is the critical material preparing the sliding contact conducting element such as collector ring in motor and electronic device, conduction commutator segment, commutator segment, conduction brush, potentiometer, it is characterized in that material need to keep contact in relatively sliding, and it being responsible for transmission electric signal and the important function of electric energy, the quality of its mechanical performance and electrical property directly affects the reliability of motor, instrument, circuit and electrical equipment, stability, degree of accuracy and service life.Relative to fixing contact and Elastic Contact contact material, sliding contact contact material needs to meet more following specific performance requirements: (1) has good electric conductivity and chemical stability, to ensure low and stable contact resistance, can not there is electrical noise when sliding in current-carrying；(2) having the abrasion resistance properties of excellence, the abrasion that relative sliding friction causes does not interferes with electric signal and the reliability and stability of electric energy input (or output)；(3) having less temperature rise, fricative temperature raises local softening or the fusing being not resulted in material, thus ensures the stable of contact resistance and avoid material to stick together；(4) there is good anti electric arc corrosion performance, when periodically the duty being switched on or switched off electric current occurring, it is possible to resist the erosion of moment electric arc well.
Along with motor, instrument develop towards miniaturization, lightweight, high speed direction, the contact resistance of silver-based sliding contact material, abrasion resistance properties, anti electric arc corrosion ability are had higher requirement.At present, apply most silver-colored graphite sliding contact materials, due to strengthen phase graphite hardness low poor with silver matrix wettability, electric conductivity is the best, skin covering of the surface thickens, contact resistance change greatly, easily occurs melting welding to cause silver graphite sliding contact material to exist under long-time energising working order, the problems such as material serious wear, therefore, develop a kind of Novel silver-based sliding contact material with excellent abrasion resistance properties and anti electric arc corrosion performance and the life-span promoting sliding contact conducting element is had important function.
Summary of the invention
The invention provides a kind of Graphene and strengthen silver-based sliding contact material, use Graphene to substitute tradition and strengthen phase graphite, and add trace rare-earth element, while keeping silver metal matrix height heat conduction high conduction performance, improve abrasion resistance properties and the anti electric arc corrosion performance of silver-based sliding contact material.Invention also provides this money base electricity that slides and connect the preparation method of material, the method technique is easy to control, operating process is short, easily accomplish scale production, it is possible to obtains and has excellent abrasion resistance properties and the silver-based sliding contact material of anti electric arc corrosion performance.
Technical solution of the present invention is as follows:
The Graphene of the present invention strengthens silver-based sliding contact material, and its chemical composition (mass percent) is: 0.04～1.5 Graphenes, and 5.0～15Ce, 0.5～2.0La, surplus is Ag.The thickness of described Graphene is 0.5～100nm, and diameter is less than 20 μm.
The Graphene of the present invention strengthens the preparation method of silver-based sliding contact material, first silver rare-earth alloy powder, Graphene is carried out ball milling and is mixed and made into composite powder；Use isostatic cool pressing that composite powder is configured to composite ingot blank, briquetting pressure 100～300MPa, then composite ingot blank is carried out HIP sintering, sintering pressure 500～800MPa, sintering temperature 500～850 DEG C, sintering time 2～5h, finally the ingot blank after sintering is carried out hot extrusion, extrusion temperature 750～850 DEG C, obtain Graphene and strengthen silver-based sliding contact material bar or silk material.
The Graphene that the present invention provides strengthens silver-based sliding contact material, because adding Graphene hardening constituent and trace rare-earth element hardening constituent in silver matrix so that this silver-based electric contact material disclosure satisfy that the application requirement of electrical contact of sliding.The Graphene that the present invention provides strengthens silver-based sliding contact material to be had the most a little: (1) is owing to Graphene particle diameter is little, hardness is high, good stability so that Graphene strengthens silver-based sliding contact material to be had than the silver-colored higher hardness of graphite contact material and more preferable abrasion resistance properties.(2) due to Graphene, there is the electric conductivity of excellence, impart Graphene and strengthen silver-based sliding contact material high conductivity.(3) good due to Graphene chemical stability, add the chemiluminescence of trace rare-earth element, further increase the anti electric arc corrosion performance of composite.
The Graphene enhancing silver-based sliding contact material prepared by the method for the present invention: 1, resistivity: ＜ 2.1 μ Ω cm；2, microhardness: HV70～120；3, tensile strength: ＞ 240MPa；4, elongation after fracture: 6～28%.
Detailed description of the invention
Embodiment 1 Graphene strengthens silver-based sliding contact material: 0.04% Graphene, 5.0%Ce, 0.5%La, surplus is Ag.Concrete step of preparation process is:
1. silver rare-earth alloy powder, Graphene carry out ball milling and are mixed and made into composite powder；
2. composite powder isostatic cool pressing makes ingot blank, briquetting pressure 100MPa；
3. ingot blank HIP sintering, sintering pressure 500MPa, sintering temperature 500 DEG C, sintering time 2h；
4. the ingot blank after sintering carries out hot extrusion, extrusion temperature 750 DEG C.Obtain Graphene and strengthen silver-based sliding contact material.
Resulting materials performance: after testing, it is 1.8 μ Ω cm that Graphene strengthens the resistivity of silver-based sliding contact material, and microhardness is HV77, and tensile strength is 246MPa, and elongation after fracture is 25%.
Embodiment 2 Graphene strengthens silver-based sliding contact material: 1.5% Graphene, 15%Ce, 2%La, surplus is Ag.Concrete step of preparation process is:
1. silver rare-earth alloy powder, Graphene carry out ball milling and are mixed and made into composite powder；
2. composite powder isostatic cool pressing makes ingot blank, briquetting pressure 300MPa；
3. ingot blank HIP sintering, sintering pressure 800MPa, sintering temperature 850 DEG C, sintering time 5h；
4. the ingot blank after sintering carries out hot extrusion, extrusion temperature 850 DEG C.Obtain Graphene and strengthen silver-based sliding contact material.
Resulting materials performance: after testing, it is 2.0 μ Ω cm that Graphene strengthens the resistivity of silver-based sliding contact material, and microhardness is HV120, and tensile strength is 289MPa, and elongation after fracture is 8%.
Claims (3)
1. a Graphene strengthens silver-based sliding contact material, it is characterized in that: this Graphene strengthens the chemical composition mass percent of silver-based sliding contact material and is: 0.04～1.5 Graphenes, 5.0～15Ce, 0.5～2.0La, surplus is Ag, the thickness of Graphene is 0.5～100nm, and diameter is less than 20 μm.
2. the preparation method of a Graphene enhancing silver-based sliding contact material, it is characterized in that: this Graphene strengthens the chemical composition mass percent of silver-based sliding contact material and is: 0.04～1.5 Graphenes, 5.0～15Ce, 0.5～2.0La, surplus is Ag, uses following processing step:
(1) silver rare-earth alloy powder, Graphene carry out ball milling and are mixed and made into composite powder；
(2) composite powder carries out cold isostatic compaction, prepares composite ingot blank, briquetting pressure 100～300MPa；
(3) composite ingot blank carries out HIP sintering, sintering pressure 500～800MPa, sintering temperature 500～850 DEG C, sintering time 2～5h；
(4) ingot blank after sintering is carried out hot extrusion, be squeezed into bar or silk material, extrusion temperature 750～850 DEG C.
Graphene the most according to claim 2 strengthens the preparation method of silver-based sliding contact material, it is characterised in that: the thickness of described Graphene is 0.5～100nm, and diameter is less than 20 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610252090.2A CN105821234A (en) | 2016-04-21 | 2016-04-21 | Preparation method for graphene-reinforcing silver-based sliding electrical contact material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610252090.2A CN105821234A (en) | 2016-04-21 | 2016-04-21 | Preparation method for graphene-reinforcing silver-based sliding electrical contact material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105821234A true CN105821234A (en) | 2016-08-03 |
Family
ID=56526294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610252090.2A Pending CN105821234A (en) | 2016-04-21 | 2016-04-21 | Preparation method for graphene-reinforcing silver-based sliding electrical contact material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105821234A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107619962A (en) * | 2017-08-31 | 2018-01-23 | 常州道博化工有限公司 | A kind of preparation method of silver-based electric contact material |
| CN107695356A (en) * | 2017-08-30 | 2018-02-16 | 昆明理工大学 | A kind of preparation method of silver/graphite/graphene sliding contact material |
| CN110666173A (en) * | 2019-09-30 | 2020-01-10 | 北京石墨烯技术研究院有限公司 | Graphene copper-magnesium alloy contact wire and preparation method thereof |
| US20200152399A1 (en) * | 2017-04-12 | 2020-05-14 | Abb Schweiz Ag | Graphene Composite Material For Sliding Contact |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385938A (en) * | 2011-11-10 | 2012-03-21 | 电子科技大学 | Metal matrix graphene composite electrical contact material and preparation method thereof |
| CN105006383A (en) * | 2015-07-13 | 2015-10-28 | 青海大学 | Novel silver-based low-voltage contact material |
| CN105385877A (en) * | 2015-11-09 | 2016-03-09 | 昆明贵金属研究所 | Novel silver-based electrical contact composite material and preparing method thereof |
-
2016
- 2016-04-21 CN CN201610252090.2A patent/CN105821234A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385938A (en) * | 2011-11-10 | 2012-03-21 | 电子科技大学 | Metal matrix graphene composite electrical contact material and preparation method thereof |
| CN105006383A (en) * | 2015-07-13 | 2015-10-28 | 青海大学 | Novel silver-based low-voltage contact material |
| CN105385877A (en) * | 2015-11-09 | 2016-03-09 | 昆明贵金属研究所 | Novel silver-based electrical contact composite material and preparing method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200152399A1 (en) * | 2017-04-12 | 2020-05-14 | Abb Schweiz Ag | Graphene Composite Material For Sliding Contact |
| US11183344B2 (en) * | 2017-04-12 | 2021-11-23 | Hitachi Energy Switzerland Ag | Graphene composite material for sliding contact |
| CN107695356A (en) * | 2017-08-30 | 2018-02-16 | 昆明理工大学 | A kind of preparation method of silver/graphite/graphene sliding contact material |
| CN107695356B (en) * | 2017-08-30 | 2019-09-27 | 昆明理工大学 | A kind of preparation method of silver/graphite/graphene sliding contact material |
| CN107619962A (en) * | 2017-08-31 | 2018-01-23 | 常州道博化工有限公司 | A kind of preparation method of silver-based electric contact material |
| CN110666173A (en) * | 2019-09-30 | 2020-01-10 | 北京石墨烯技术研究院有限公司 | Graphene copper-magnesium alloy contact wire and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105821234A (en) | Preparation method for graphene-reinforcing silver-based sliding electrical contact material | |
| CN103334039B (en) | Copper-based nano diamond composite material and preparation method thereof | |
| CN102489898B (en) | Low-silver lead-free flux paste and preparation method thereof | |
| CN102242302A (en) | Preparation method of layered ternary ceramic reinforced copper composite material | |
| CN101268524B (en) | Chip-shaped electronic component | |
| CN110157932B (en) | Preparation method of graphene modified copper-based electrical contact material based on in-situ synthesis | |
| CN101699591A (en) | Copper-tungsten/copper-alloy integrated contact and preparation method thereof | |
| CN105274384A (en) | High-strength anti-wear copper-based composite material and preparation method thereof | |
| CN105006383A (en) | Novel silver-based low-voltage contact material | |
| CN104451224A (en) | Preparation method of self-lubricating composite material | |
| CN103352136A (en) | Copper-based contact material and manufacturing process thereof | |
| JP4667103B2 (en) | Conductive filler and low-temperature solder material | |
| CN104051054A (en) | Silver-based and titanium-carbide-based contact material and preparation method thereof | |
| CN104715807A (en) | Conductive adhesive composition and method for forming electrode | |
| CN105742083A (en) | Composite electric contact material with carbon nanotube enhancement, and preparation process thereof | |
| CN105177346A (en) | Tungsten-copper electric contact material and preparation method thereof | |
| CN101812609B (en) | Conductive wear resistant material and preparation method thereof | |
| CN101186983A (en) | Special copper alloy and manufacturing method thereof | |
| CN108823444B (en) | Short-process preparation method of copper-carbon composite material | |
| CN102044347A (en) | Preparation method and products of silver-copper-nickel-ceramic alloy contact material with high welding resistance | |
| CN105355474A (en) | AgW50 composite electric contact material for breaker and manufacturing method thereof | |
| CN108251683B (en) | Silver-based contact material with high fusion welding resistance and preparation method thereof | |
| CN101281824A (en) | Constant quantity cuprum-diamond electrical contact material added with silver | |
| CN102492868A (en) | Cu-Bi alloy and preparation method thereof | |
| CN106282643A (en) | A kind of cuprio electric contact composite material and vacuum hot-pressing process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160803 |
|
| WD01 | Invention patent application deemed withdrawn after publication |