冷变形与时效对Cu-15Cr-Ce原位复合材料组织和性能的影响  

Effect of Cold Deformation and Aging Treatment on Microstructure and Properties for Cu-15Cr-Ce In-situ Composites

作　　者：李亚明[1,2] 李文生[1] 李文有[2] 陈维铅[1,2] 李涛 章慧成[1,2] Li Yaming;Li Wensheng;Li Wenyou;Chen Weiqian;Li Tao;Zhang Huicheng(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;Gansu Key Laboratory of Solar Power Generation System Project,Jiuquan Vocational and Technical College,Jiuquan 735000,China)

机构地区：[1]兰州理工大学有色金属先进加工与循环利用国家重点实验室,甘肃兰州730050 [2]酒泉职业技术学院甘肃省太阳能发电系统工程重点实验室,甘肃酒泉735000

出　　处：《中国稀土学报》2024年第6期1169-1177,I0004,共10页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(52075234);甘肃省自然科学基金项目(20JR10RF814);陇原青年创新创业人才项目(2022LQGR49);酒泉市科技支撑计划项目(2022CA1011);甘肃省高等学校创新基金项目(2023B-433)资助。

摘　　要：采用光学显微镜(OM)、扫描电子显微镜(SEM)、电子拉力试验机、金属电导仪研究了冷变形量与时效处理Cu-15Cr-0.1Ce合金微观组织及性能的影响。结果表明:Cu-15Cr-0.1Ce合金经冷变形和时效处理后性能显著提高,形成弥散分布的纤维相是该合金获得高强度高硬度的重要原因,同时时效处理促进Cu基体中固溶原子大量析出,减少电子散射率,使得导电率升高。当变形量(η=6)+(550℃,1 h)时效处理后综合性能最佳,强度、导电率、硬度、伸长率分别达到802 MPa,72.8%IACS,28HRC,8.45%。在此基础上,建立起Cu-15Cr微观组织演化模型,解释其纤维组织形成机制。The effects of cold deformation and aging treatment on the microstructure and properties of Cu-15Cr 0.1Ce alloy were investigated by an optical microscope,a scanning electron microscope,an electronic tensile-testing machine and a metal conductivity instrument.The results show that the conductivity and mechanical properties of Cu 15Cr-0.1Ce are significantly improved by appropriate cold deformation and aging treatment.It is known that dispersion precipitation of the fiber phase is an important reason for the high strength of large plastic deformation alloys.And the high conductivity is due to the large amount of atomic solution precipitated from the Cu matrix and the electron scattering rate reduced.The alloys canobtainthe optimum performance through cold deformation(η=6)+(550℃,1 h)aging,and the tensile strength,electrical conductivity,hardness and elongation are 802 MPa,72.8%IACS,28HRC and 8.45%,respectively.On this basis,a model of the microstructure evolution of Cu-Cr in-situ composites has been established to explain the mechanism of fiber formation.

关 键 词：稀土Ce Cu-15Cr合金 微观组织 力学性能 导电性能 

分 类 号：TG146.1[一般工业技术—材料科学与工程]