(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)
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。
关键字: Cu-Cr合金；Ce；微观组织；力学性能；导电性；摩擦；磨损
（1. Department of Chemical Engineering, Jiuquan Vocational and Technical College, Jiuquan 735000, China;
2. State Key Laboratory of Advanced Nonferrous Materials, Lanzhou University of Technology, Lanzhou 730050, China）
Abstract: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.
Key words: Cu-Cr alloy; Ce; microstructure; mechanical property; conductivity; friction; wear
