固溶时效后高强高导Cu-Cr-Zr合金的性能与显微组织研究  

Influence of Solution-aging Treatment on Microstructures and Properties of High Strength High Conductivity Cu-Cr-Zr Alloy

作　　者：陈小波[1] 姜锋[1] 陈蒙[1] 蒋龙[1] 黄祖琼[1] 韦莉莉[1] 

机构地区：[1]中南大学材料科学与工程学院,有色金属材料科学与工程教育部重点实验室,长沙410083

出　　处：《宇航学报》2009年第4期1680-1685,共6页Journal of Astronautics

基　　金：科技部国际合作重点项目(2006DFA53240);湖南省国际合作重点项目(05WK2004)

摘　　要：在测试不同固溶时效阶段Cu-Cr-Zr合金力学性能和导电性能的基础上,采用金相显微镜(OM)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)观察了合金的显微组织,发现经过490℃/240min时效处理后合金达到时效强度峰值,强度的提高主要是共格弥散强化相造成。运用Gerold及其推导公式计算了共格强化导致的最大拉伸应力增量(△σcsmax)的范围,同时应用单元体导电模型和马提申定则计算了合金时效时的导电率的增量值范围,与实验数值相比误差较小。说明所建模型能较好的反映时效析出过程中的强度和导电率变化。The hardness, tensile properties and electrical conductivity of Cu-0.8Cr-0.2Zr alloy in different solution and aging treatments were tested and corresponding microstructures were observed by Optical Microscopy （OM） , Scanning Electron Microscopy （SEM） and Transmission Electron Microscopy （TEM）. It was found that the alloy aging treated at 490℃ for 4h had obtained peak strength and the coherent dispersion strengthening was proved to be the major factor contributing to the improvement of strength. Respectively, the degree of coherent strengthening was almost identical with that calculated by Gerold eguation and electric conductivity of Cu-Cr -Zr alloy was feasible to account by model of conductive unit body.

关 键 词：CU-CR-ZR合金 固溶时效 显微组织 力学性能 导电率 

分 类 号：TG146.4[一般工业技术—材料科学与工程]