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中文摘要：
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。
英文摘要：
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.
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