Cr分布对Cu-Cr合金性能的影响  

Effect of Cr distribution on the properties of Cu-Cr alloy

作　　者：王庆娟[1] 徐长征[1] 黄美权[1] 郑茂盛[2] 

机构地区：[1]西安交通大学材料科学与工程学院 [2]西北大学凝聚态物理与材料研究所,陕西西安710068

出　　处：《功能材料》2007年第7期1125-1127,1131,共4页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2002AA331110);西安交通大学博士生论文资助项目(DFXJ-TU2003-4)

摘　　要：Cu-Cr合金是一种很好的时效强化型合金,其性能主要取决于Cr在Cu基中的分布。对Cu-0.2Cr合金研究发现,当Cr固溶于铜中时硬度和导电性最低,通过时效后的衍射和性能分析,析出相为fcc(face-centered cubic)的Cr且与基体保持着共格关系,其硬度和导电性分别提高了32.8Hv和39.9IACS%。对时效后合金的强度按共格弥散强化造成的切变应力的增量进行估算,其估算值与实测值相差6%。用马提申定则对固溶和时效后合金的导电性进行估算,估算结果与实测结果相差较小,因此在低固溶条件下,可以利用马提申定则对固溶和时效后Cu-Cr合金的导电性进行估算。The effect of the distribution Cr on the properties of Cu-Cr alloy is studied.The hardness and conductivity of Cu-0.2Cr is the minimum after solid solution treatment.Analyses of diffraction and properties after aging treatment indicate that the precipitated phase is face-centered cubic Cr coherency with matrix.The hardness and the electric conductivity of alloy could rise about 32.8Hv and 39.9IACS% in aging state as compared to those in solid solution state.It is feasible to account electric conductivity of Cu-Cr alloy by Matthiessen rule in low solid solution alloy.

关 键 词：CU-CR合金 Cr分布 共格弥散强化 导电性 强度 

分 类 号：TG146.1[一般工业技术—材料科学与工程] TG113.2[金属学及工艺—金属材料]