CN1564267A - High conducting wear resistance copper-base composite material - Google Patents
High conducting wear resistance copper-base composite material Download PDFInfo
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- CN1564267A CN1564267A CN 200410017687 CN200410017687A CN1564267A CN 1564267 A CN1564267 A CN 1564267A CN 200410017687 CN200410017687 CN 200410017687 CN 200410017687 A CN200410017687 A CN 200410017687A CN 1564267 A CN1564267 A CN 1564267A
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Abstract
The composite material is suitable to sliding electrical contact technical area. each component and Wt% in the material is pure copper 89.1%-95.6%, SiC particle 3.1%-6.6%, graphite particle 1.2%-4.2% and dispersant 0.10%-0.20%. Through optimized design, the invention selects SiC particle as reinforce of possessing fine mechanical property and in low price, selects graphite particle as self lubricating agent so as to fabricate the invented composite material having advantages of high conductivity and heat conductivity, good friction performance and easier of obtaining raw materials.
Description
Technical field
The present invention relates to a kind of metal-base composites, specifically is a kind of high conduction wear resistant friction reducing Cu-base composites.Be used for sliding and electrically contact technical field.
Background technology
Copper has very high conductivity, thermal conductivity, corrosion resistance and good processing performance, and is widely used in each industrial department as conduction, heat conduction functional material.But the intensity of copper is low, poor heat resistance, and easy softening transform under the high temperature, thereby its application is restricted.Current mainly is to form the performance that dispersion-strengtherning improves copper by interpolation Cr, Zr, various alloying elements such as Ag, Fe.Find by literature search, people such as J.B.Correia are at " Acta Materialia ", 1997, in " Strengthening in rapidlysolidified age hardened Cu-Cr and Cu-Cr-Zr alloys " (reinforcement of rapid solidification Cu-Cr and Cu-Cr-Zr alloy) literary composition of delivering on the 45:177-190, the requirement that alloying can not satisfy high conduction performance and mechanical performance is simultaneously proposed, the adding of alloying element often causes the conduction of material, heat conductivility descends bigger, and disperse phase can be dissolved again and lost invigoration effect under the high temperature, makes that the softening temperature of copper alloy is lower.Particles reiforced metal-base composition has higher resistance to wear, mechanical behavior under high temperature and lower thermal coefficient of expansion, and preparation technology is simple, cost is lower, so development in recent years is rapid.The ceramic particle reinforce that adds strong mechanical performance in the copper matrix is expected to improve the intensity and the resistance to wear of material under the prerequisite that keeps copper good conductive energy.Graphite adds to obtain low coefficient of friction, low wear rate and excellent bite-resistant performance in the metal to as a kind of common kollag.Therefore, above-mentioned additive is added in the copper matrix by certain content with form single or that mix, prepare conduction, good heat conductivity, and have the composite material of good friction polishing machine, adapting to slides electrically contacts the application in field, is the problem to be solved in the present invention.
Summary of the invention
The objective of the invention is at the deficiency in the background technology, a kind of high conduction wear resistant friction reducing Cu-base composites is provided, make Cu-base composites have favorable conductive heat conductivility and wear-resisting, antifriction characteristic, and mechanical performance is good, overcomes the problem that electrically contacts the used copper alloy in field when front slide.
The present invention realizes by following proposal, each component and percentage by weight thereof that the high conduction of the present invention wear resistant friction reducing Cu-base composites comprises are: fine copper 89.1%-95.6%, SiC particle 3.1%-6.6%, graphite granule 1.2%-4.2%, dispersant 0.10%-0.20%.
Described fine copper adopts electrolytic copper powder, and granularity is less than 48 μ m, and purity is higher than 99.7%; Described SiC particle mean size can be prepared from by nickel chemical plating technology for 7 μ m-20 μ m; Described graphite granule is the granular Delaniums of average-size 43 μ m, is prepared from through chemical-copper-plating process, and the mass ratio of graphite and copper coating is 1: 1; Described dispersant is a 20# machine oil.With the powder of said ratio by cold pressing, the powder metallurgical technique of sintering, hot pressing is prepared into composite material.
The kind of choose reasonable matrix of the present invention and reinforce, and scientifically carried out the optimizing components design, by adding good mechanical performance and low-cost SiC particle as reinforce, with graphite as the self-lubricating agent, conduction, thermal conductivity height have been obtained, frictional behaviour is good, and fairly simple, the lower-cost granule reinforced copper base composite material of preparation supply.
Embodiment
Provide following examples in conjunction with content of the present invention:
Embodiment 1:
By electrolytic copper powder be 95.6%, the SiC powder is 3.1%, graphite powder is 1.2%, dispersant is 0.1% to carry out proportioning, by powder metallurgical technique, prepares density and be 99.2% and the Cu-base composites that is evenly distributed of SiC and graphite granule.The Brinell hardness of material (HB) is 73.2, conductivity 82.5%IACS; Dry wear test result on M200 ring-piece formula abrasion tester shows, at load 40N, relative sliding velocity is under the DRY SLIDING of 0.42m/s, and wear rate is 46.7% of a fine copper, be 52.9% of cold-drawn Cu-0.65%Cr-0.08%Zr (percentage by weight, down together) alloy; Coefficient of friction 0.39 is 76.5% of fine copper, is 81.1% of cold-drawn Cu-0.65%Cr-0.08%Zr alloy.The sem observation of worn surface finds that with fine copper and cold-drawn Cu-0.65%Cr-0.08%Zr alloy phase ratio, the adhesive wear of composite material obviously reduces; Graphite can effectively improve the resistance to wear of composite material, reduces coefficient of friction, also reduces the wearing and tearing to mating part, has greatly improved the life-span of whole friction system.
Embodiment 2:
By electrolytic copper powder be 89.1%, the SiC powder is 6.6%, graphite powder is 4.2%, dispersant is 0.1% to carry out proportioning, by powder metallurgical technique, prepares density and be 98.3% and the Cu-base composites that is evenly distributed of SiC and graphite granule.The Brinell hardness of material (HB) is 74.3, conductivity 71.3%IACS.Dry wear test result on M200 ring-piece formula abrasion tester shows that at load 40N, relative sliding velocity is under the DRY SLIDING of 0.42m/s, and wear rate is 22.1% of a fine copper, is 25.0% of cold-drawn Cu-0.65%Cr-0.08%Zr alloy; Coefficient of friction 0.31 is 60.7% of fine copper, is 64.6% of cold-drawn Cu-0.65%Cr-0.08%Zr alloy.The sem observation of worn surface finds that with fine copper and cold-drawn Cu-0.65%Cr-0.08%Zr alloy phase ratio, the adhesive wear of composite material obviously reduces; Graphite can effectively improve the resistance to wear of composite material, reduces coefficient of friction, also reduces the wearing and tearing to mating part, has greatly improved the life-span of whole friction system.
Embodiment 3:
By electrolytic copper powder be 94.0%, the SiC powder is 4.0%, graphite powder is 1.9%, dispersant is 0.15% to carry out proportioning, by powder metallurgical technique, prepares density and be 98.9% and the Cu-base composites that is evenly distributed of SiC and graphite granule.The Brinell hardness of material (HB) is 73.3, conductivity 79.8%IACS.Dry wear test result on M200 ring-piece formula abrasion tester shows that at load 40N, relative sliding velocity is under the DRY SLIDING of 0.42m/s, and wear rate is 37.3% of a fine copper, is 42.3% of cold-drawn Cu-0.65%Cr-0.08%Zr alloy; Coefficient of friction 0.36 is 70.6% of fine copper, is 75.0% of cold-drawn Cu-0.65%Cr-0.08%Zr alloy.The sem observation of worn surface finds that with fine copper and cold-drawn Cu-0.65%Cr-0.08%Zr alloy phase ratio, the adhesive wear of composite material obviously reduces; Graphite can effectively improve the resistance to wear of composite material, reduces coefficient of friction, also reduces the wearing and tearing to mating part, has greatly improved the life-span of whole friction system.
Embodiment 4:
By electrolytic copper powder be 90.7%, the SiC powder is 5.1%, graphite powder is 4.1%, dispersant is 0.2% to carry out proportioning, by powder metallurgical technique, prepares density and be 98.1% and the Cu-base composites that is evenly distributed of SiC and graphite granule.The Brinell hardness of material (HB) is 72.1, conductivity 73.6%IACS.Dry wear test result on M200 ring-piece formula abrasion tester shows that at load 40N, relative sliding velocity is under the DRY SLIDING of 0.42m/s, and wear rate is 24.2% of a fine copper, is 27.4% of cold-drawn Cu-0.65%Cr-0.08%Zr alloy; Coefficient of friction 0.32 is 62.7% of fine copper, is 66.7% of cold-drawn Cu-0.65%Cr-0.08%Zr alloy.The sem observation of worn surface finds that with fine copper and cold-drawn Cu-0.65%Cr-0.08%Zr alloy phase ratio, the adhesive wear of composite material obviously reduces; Graphite can effectively improve the resistance to wear of composite material, reduces coefficient of friction, also reduces the wearing and tearing to mating part, has greatly improved the life-span of whole friction system.
Claims (5)
1, a kind of high conduction wear resistant friction reducing Cu-base composites is characterized in that, each component and the percentage by weight thereof that comprise are: fine copper 89.1%-95.6%, SiC particle 3.1%-6.6%, graphite granule 1.2%-4.2%, dispersant 0.10%-0.20%.
2, high conduction wear resistant friction reducing Cu-base composites according to claim 1 is characterized in that described fine copper adopts electrolytic copper powder, and granularity is less than 48 μ m, and purity is higher than 99.7%.
3, high conduction wear resistant friction reducing Cu-base composites according to claim 1 is characterized in that described SiC particle mean size is 7 μ m-20 μ m.
4, high conduction wear resistant friction reducing Cu-base composites according to claim 1 is characterized in that described graphite granule is the granular Delaniums of average-size 43 μ m, is prepared from through chemical-copper-plating process, and the mass ratio of graphite and copper coating is 1: 1.
5, high conduction wear resistant friction reducing Cu-base composites according to claim 1 is characterized in that described dispersant is a 20# machine oil.
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| CN 200410017687 CN1257512C (en) | 2004-04-15 | 2004-04-15 | High conducting wear resistance copper-base composite material |
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| CN 200410017687 CN1257512C (en) | 2004-04-15 | 2004-04-15 | High conducting wear resistance copper-base composite material |
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| CN1257512C CN1257512C (en) | 2006-05-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982552A (en) * | 2010-10-21 | 2011-03-02 | 哈尔滨工业大学 | Copper coated graphite and nano-silicon carbide mixed reinforced copper-based composite material and preparation method thereof |
| CN102031410A (en) * | 2010-11-12 | 2011-04-27 | 哈尔滨工业大学 | High-strength wear-resisting self-lubricating copper-base composite material |
| CN101800089B (en) * | 2009-10-28 | 2012-04-11 | 无锡润鹏复合新材料有限公司 | Nanometer NbSe2 copper-base solid self-lubricating composite material and preparation method thereof |
| CN105256168A (en) * | 2015-10-26 | 2016-01-20 | 三峡大学 | Copper-based graphite self-lubricating composite material and preparing method thereof |
| CN106282634A (en) * | 2016-08-05 | 2017-01-04 | 宁波金特信钢铁科技有限公司 | A kind of preparation method of metal-based self-lubricating material |
-
2004
- 2004-04-15 CN CN 200410017687 patent/CN1257512C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800089B (en) * | 2009-10-28 | 2012-04-11 | 无锡润鹏复合新材料有限公司 | Nanometer NbSe2 copper-base solid self-lubricating composite material and preparation method thereof |
| CN101982552A (en) * | 2010-10-21 | 2011-03-02 | 哈尔滨工业大学 | Copper coated graphite and nano-silicon carbide mixed reinforced copper-based composite material and preparation method thereof |
| CN101982552B (en) * | 2010-10-21 | 2012-06-06 | 哈尔滨工业大学 | Preparation method of copper coated graphite and nano-silicon carbide mixed reinforced copper-based composite material |
| CN102031410A (en) * | 2010-11-12 | 2011-04-27 | 哈尔滨工业大学 | High-strength wear-resisting self-lubricating copper-base composite material |
| CN105256168A (en) * | 2015-10-26 | 2016-01-20 | 三峡大学 | Copper-based graphite self-lubricating composite material and preparing method thereof |
| CN106282634A (en) * | 2016-08-05 | 2017-01-04 | 宁波金特信钢铁科技有限公司 | A kind of preparation method of metal-based self-lubricating material |
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| Publication number | Publication date |
|---|---|
| CN1257512C (en) | 2006-05-24 |
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