Microstructure and Properties of Cu-Cr-Zr Alloy for Wire Contacting

Niu Meiying; Qu Jilei; Zeng Yi; Luo Fengxiang

doi:10.15980/j.tzzz.2021.09.013

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Microstructure and Properties of Cu-Cr-Zr Alloy for Wire Contacting
Vol. 41, Issue 9, Pages: 1124-1128(2021)
Published： 2021 ，
DOI： 10.15980/j.tzzz.2021.09.013

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Niu Meiying, Qu Jilei, Zeng Yi, et al. Microstructure and Properties of Cu-Cr-Zr Alloy for Wire Contacting. [J]. Special Casting & Nonferrous Alloys 41(9):1124-1128(2021)
DOI：

Niu Meiying, Qu Jilei, Zeng Yi, et al. Microstructure and Properties of Cu-Cr-Zr Alloy for Wire Contacting. [J]. Special Casting & Nonferrous Alloys 41(9):1124-1128(2021) DOI： 10.15980/j.tzzz.2021.09.013.

摘要

采用硬度计、涡流导电仪、扫描电镜和透射电镜等手段

对铸态和时效态Cu-xCr-0.15Zr（质量分数

x=0.8～2.0）合金进行了硬度、电导率和显微组织分析。结果表明

时效态Cu-xCr-0.15Zr合金的硬度和电导率明显高于铸态;当Cr含量从0.8%增加至2.0%时

时效态Cu-xCr-0.15Zr合金的硬度、抗拉强度和电导率都呈先增加后减小的趋势

在Cr含量为1.0%时合金电导率、硬度（HB）和抗拉强度分别为48.37 MS/m、138和617 MPa。这主要与固溶和时效热处理后

Cu-Cr-0.15Zr合金中弥散析出了起第二相强化作用的纳米级CuZr

相和Cu

Zr相有关。

Abstract

The hardness

conductivity and microstructure of as-cast and aged Cu-xCr-0.15 Zr（x=0.8～2.0） alloy were analyzed by means of hardness tester

eddy current conductivity tester

scanning electron microscope and transmission electron microscope. The results reveal that the hardness and conductivity of the aged Cu-xCr-0.15 Zr alloy are significantly higher than those of the as-cast alloy. As the Cr content increases from 0.8% to 2.0%

the hardness

tensile strength and conductivity of the aged Cu-xCr-0.15 Zr alloy are increased firstly and then decreased. When the Cr content is 1.0%

the conductivity

hardness and tensile strength reach up to 48.37 MS/m

138 HB and 617 MPa

respectively

which is mainly related to the dispersive precipitation of nano-sized CuZr

phase and Cu

Zr phase after solution and aging heat treatment

playing the role of second phase strengthening in Cu-xCr-0.15 Zr alloy.