接触导线用Cu-Cr-Zr合金的组织性能  

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

作　　者：牛美英[1] 渠基磊[1] 曾毅 罗凤翔 Niu Meiying;Qu Jilei;Zeng Yi;Luo Fengxiang(Xingtai Polytechnic College;School of Materials Science and Engineering,Yanshan University)

机构地区：[1]邢台职业技术学院,河北邢台054035 [2]燕山大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2021年第9期1124-1128,共5页Special Casting & Nonferrous Alloys

基　　金：河北省高等学校科学技术研究重点项目(ZD2019252)。

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_(2)相和Cu5Zr相有关。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_(2)phase and Cu5Zr phase after solution and aging heat treatment,playing the role of second phase strengthening in Cu-xCr-0.15 Zr alloy.

关 键 词：铸态 时效态 Cu-xCr-0.15Zr合金 显微组织 性能 

分 类 号：TG174[金属学及工艺—金属表面处理] TG146.11[金属学及工艺—金属学]