微量Ag对形变Cu-Fe原位复合材料组织和性能的影响  

Effect of trace Ag addition on microstructure and properties of Cu-Fe in-situ composites

作　　者：刘克明[1,2] 周海涛[1] 陆德平[2] Andrej Atrens 邹晋[2] 陈志宝[2] 谢仕芳[2] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]江西省科学院江西省铜钨新材料重点实验室,江西南昌330029 [3]昆士兰大学材料系

出　　处：《材料热处理学报》2010年第6期62-67,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金项目(50961006);科技部国际科技合作计划项目(2006DFB53050);江西省学科带头人项目(060009)

摘　　要：采用熔铸-中间热处理-形变工艺制备了Cu-14Fe及Cu-14Fe-0.06Ag原位复合材料,利用光学显微镜、扫描电镜、数字微欧计及液晶电子拉力试验机研究了微量Ag对Cu-14Fe合金微观组织、力学性能及导电性能的影响。结果表明,微量Ag的加入使Cu-14Fe合金枝晶组织更发达且枝晶臂直径更小,相同形变量下形成的纤维更加细小均匀,材料的强度显著提高,电导率也有所上升,伸长率略有提高,冷加工性能明显改善。Cu-14Fe and Cu-14Fe-0.06Ag in-situ composites were prepared by cast and thermo-mechanical treatment process.The effect of trace Ag addition on microstructure and mechanical and electrical properties of Cu-Fe in-situ composites were investigated by means of optical microscopy,scanning electronic microscopy（SEM）,tensile test and conductivity measurement using micro-ohmmeter.Experimental results indicate that the addition of trace Ag in Cu-Fe alloy can refine primary Fe dendrites and deforms finer Fe fiber,which leads to a significant increase in strength and slight improvement in conductivity.At the same time,the Cu-14Fe-0.06Ag in-situ composite shows much higher plasticity and better cold-working property.

关 键 词：微量Ag 原位复合材料 微观组织 力学性能 导电性能 

分 类 号：TB331[一般工业技术—材料科学与工程]