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High conducting wear resistance copper-base composite material

A technology of copper-based composite materials and high conductivity, applied in the direction of contact materials, metal/alloy conductors, etc., can solve the problems of not meeting high conductivity and mechanical properties at the same time, low softening temperature of copper alloy, loss of strengthening effect, etc., to achieve Effects of low cost, good friction performance, and simple supply

Inactive Publication Date: 2005-01-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Found through literature search, "Strengthening in rapidly solidified age hardened Cu-Cr and Cu-Cr-Zr alloys" published by J.B.Correia et al. in "Acta Materialia", 1997,45:177-190 -Strengthening of Cr-Zr alloys), it is proposed that the alloying method cannot meet the requirements of high conductivity and mechanical properties at the same time. It dissolves and loses its strengthening effect, making the softening temperature of copper alloys lower

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The ratio of electrolytic copper powder is 95.6%, SiC powder is 3.1%, graphite powder is 1.2%, and dispersant is 0.1%. Through powder metallurgy process, the density is 99.2%, and SiC and graphite particles are evenly distributed. copper matrix composites. The Brinell hardness (HB) of the material is 73.2, and the electrical conductivity is 82.5% IACS; the dry friction test results on the M200 ring-block wear tester show that under the dry friction conditions with a load of 40N and a relative sliding speed of 0.42m / s , the wear rate is 46.7% of pure copper, which is 52.9% of cold-drawn Cu-0.65%Cr-0.08%Zr (weight percentage, the same below) alloy; the friction coefficient is 0.39, which is 76.5% of pure copper, which is cold-drawn Cu- 81.1% of 0.65%Cr-0.08%Zr alloy. The scanning electron microscope observation of the worn surface morphology found that compared with pure copper and cold-drawn Cu-0.65%Cr-0.08%Zr alloy, the adhesive wear of the composite material was signi...

Embodiment 2

[0011] According to the ratio of 89.1% electrolytic copper powder, 6.6% SiC powder, 4.2% graphite powder, and 0.1% dispersant, the density is 98.3% and the SiC and graphite particles are evenly distributed through the powder metallurgy process. copper matrix composites. The material has a Brinell hardness (HB) of 74.3 and an electrical conductivity of 71.3% IACS. The results of the dry friction test on the M200 ring-block wear tester show that under the dry friction conditions of a load of 40N and a relative sliding speed of 0.42m / s, the wear rate is 22.1% of pure copper, which is 0.65% of cold drawn Cu-0. 25.0% of Cr-0.08%Zr alloy; friction coefficient 0.31, 60.7% of pure copper, 64.6% of cold drawn Cu-0.65%Cr-0.08%Zr alloy. The scanning electron microscope observation of the worn surface morphology found that compared with pure copper and cold-drawn Cu-0.65%Cr-0.08%Zr alloy, the adhesive wear of the composite material was significantly reduced; graphite can effectively impr...

Embodiment 3

[0013] According to the proportion of electrolytic copper powder 94.0%, SiC powder 4.0%, graphite powder 1.9%, dispersant 0.15%, through powder metallurgy process, the density is 98.9%, and SiC and graphite particles are evenly distributed. copper matrix composites. The material has a Brinell hardness (HB) of 73.3 and an electrical conductivity of 79.8% IACS. The results of the dry friction test on the M200 ring-block wear tester show that under the dry friction conditions of a load of 40N and a relative sliding speed of 0.42m / s, the wear rate is 37.3% of pure copper, which is 0.65% of cold drawn Cu-0. 42.3% of Cr-0.08%Zr alloy; friction coefficient 0.36, 70.6% of pure copper, 75.0% of cold drawn Cu-0.65%Cr-0.08%Zr alloy. The scanning electron microscope observation of the worn surface morphology found that compared with pure copper and cold-drawn Cu-0.65%Cr-0.08%Zr alloy, the adhesive wear of the composite material was significantly reduced; graphite can effectively improve ...

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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 [0001] The invention relates to a metal-based composite material, in particular to a high-conductivity wear-resistant and anti-friction copper-based composite material. Used in the field of sliding electrical contact technology. Background technique [0002] Copper has high electrical conductivity, thermal conductivity, corrosion resistance and excellent process performance, and is widely used in various industrial sectors as an electrical and thermal conductive functional material. However, copper has low strength, poor heat resistance, and is easy to soften and deform at high temperatures, so its application is limited. At present, the performance of copper is mainly improved by adding various alloying elements such as Cr, Zr, Ag, and Fe to form dispersion strengthening. Found through literature search, "Strengthening in rapidly solidified age hardened Cu-Cr and Cu-Cr-Zr alloys" published by J.B.Correia et al. in "Acta Materialia", 1997,45:177-190 -Stren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00H01B1/02H01H1/02
Inventor 张国定湛永钟
Owner SHANGHAI JIAO TONG UNIV
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