(1. 酒泉職業(yè)技術(shù)學(xué)院 化學(xué)工程系，酒泉 735000；
2. 蘭州理工大學(xué) 有色金屬新材料省部共建國家重點(diǎn)實(shí)驗(yàn)室，蘭州 730050)
摘 要: 采用熔鑄-中間熱處理-形變工藝制備形變Cu-15Cr及Cu-15Cr-0.05Ce原位復(fù)合材料。利用光學(xué)顯微鏡、掃描電鏡、液晶電子拉力試驗(yàn)機(jī)以及往復(fù)摩擦磨損試驗(yàn)機(jī)研究Cu-15Cr及Cu-15Cr-0.05Ce合金的微觀組織、力學(xué)性能、導(dǎo)電性能和摩擦磨損性能。結(jié)果表明：微量Ce的加入使Cu-15Cr合金鑄態(tài)組織枝晶臂直徑減小，在相同應(yīng)變量下形成的纖維更加細(xì)小均勻，材料的強(qiáng)度顯著提高，導(dǎo)電率略有上升，摩擦磨損性能大幅提高。
關(guān)鍵字: Cu-Cr合金；Ce；微觀組織；力學(xué)性能；導(dǎo)電性；摩擦；磨損
（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
