变形时效复合处理对CuCr0.9合金性能的影响
Effects of Composite Process of Deformation and Aging on Performance of CuCr0.9 Alloy
王延枝, 张凌峰, 刘 巍, 霍俊豪
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作者单位：河南科技大学 材料科学与工程学院, 河南 洛阳 471003
中文关键字：时效； 变形； 显微硬度； 导电率； 触头材料
英文关键字：aging; deformation; microhardness; conductivity; contact material
中文摘要：研究了变形和时效处理对CuCr0.9合金显微硬度和导电率的影响，寻求最佳的复合处理工艺，得到高硬度、高电导率的触头材料。结果表明：合金最佳的处理工艺是对固溶后的CuCr合金进行40%变形，然后在500 ℃下时效2 h， 此时CuCr合金的综合性能最佳。从其TEM微观组织形貌可看出，经过复合处理后基体存在高密度位错，且有大量细小弥散强化相析出， 析出相与基体之间保持良好的共格关系。此时硬度可达到137 HV，导电率达到87%IACS。
英文摘要：The effects of deformation and aging treatment on the microhardness and conductivity of CuCr0.9 alloy were studied. The best compound technique was found and a contact material with high hardness and high conductivity was also obtained. The results show that the best composite process is 40% deformed and then aged at 500 ℃ for 2 h for the best comprehensive performance of CuCr0.9 alloy. From TEM microstructure morphologies, high-density dislocation and a large number tiny dispersion strengthening phase can be found in matrix after composite process, and the good coherency relationship between dispersion phase and matrix can be also observed. Accordingly, the hardness and conductivity of CuCr0.9 alloy increases to 137 HV and 87%IACS, respectively.