形变Cu-15Cr-Ce原位复合材料的组织和性能  

Microstructure and properties of deformed Cu-15Cr-Ce in-situ composites

作　　者：李文有[1] 李亚明[1] 李文生[2] 孔祥波[1] 王华[1] 

机构地区：[1]酒泉职业技术学院化学工程系,酒泉735000 [2]兰州理工大学有色金属新材料省部共建国家重点实验室,兰州730050

出　　处：《中国有色金属学报》2014年第6期1518-1523,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51165021);甘肃省杰出青年基金资助项目(1111RJDA013);西部之光项目(01-0081)

摘　　要：采用熔铸-中间热处理-形变工艺制备形变Cu-15Cr及Cu-15Cr-0.05Ce原位复合材料。利用光学显微镜、扫描电镜、液晶电子拉力试验机以及往复摩擦磨损试验机研究Cu-15Cr及Cu-15Cr-0.05Ce合金的微观组织、力学性能、导电性能和摩擦磨损性能。结果表明:微量Ce的加入使Cu-15Cr合金铸态组织枝晶臂直径减小,在相同应变量下形成的纤维更加细小均匀,材料的强度显著提高,导电率略有上升,摩擦磨损性能大幅提高。Cu-15Cr and Cu-15Cr-0.05Ce in-situ composites were prepared by the cast, thermo-mechanical treatment process. The microstructure, mechanical properties, conductivity and friction and wear performance of the in-situ composites were investigated by optical microscope, scanning electronic microscope, tensile-testing machine and pin-on-bar reciprocating device. The results indicate that the trace addition of Ce can refine the primary dendrites of Cu-15Cr alloy and deformed Cr fiber, which leads to a significant increase in strength and slight improvement in conductivity. At the same time, the Cu-15Cr-0.05Ce in-situ composite shows better friction and wear performance.

关 键 词：CU-CR合金 微观组织 力学性能 导电性 摩擦 磨损 

分 类 号：TG146.4[一般工业技术—材料科学与工程]