中文摘要：

为了研发新型高强高导引线框架 CuCrSnZn系合金，研究了不同的形变热处理工艺以及稀土元素 Ce、Y对Cu-Cr-Sn-Zn合金的显微硬度和导电率的影响。通过金相显微镜对合金的微观组织进行了研究。结果表明：经过920℃下1 h固溶450℃下时效3 h后，3种合金达到最好的综合性能。时效前冷变形能够明显提高合金的硬度，导电率基本保持不变。变形量小于60％时，随着变形量的增加，时效后的晶粒越细小；变形量为80％时，出现了粗大的晶粒。 Cu-Cr-Sn-Zn-Y合金经过60％冷变形450℃时效1 h后，其硬度和导电率能够达到172．1 HV、70％IACS。

英文摘要：

For the purpose of researching and developing new types of lead frame CuCrSnZn alloys with high e-lectrical conductivity and high strength, the impact of thermomechanical treatment and trace rare earth Ce and Y on the microhardness and electrical conductivity of the Cu-Cr-Sn-Zn alloy was studied.The microstructure of the alloy was researched through the use of a metallographic microscope .The results show that these three types of alloys have the best comprehensive performance after the solution is at 920℃ for 1 h and aged at 450℃ for 3 h.Cold deformation before aging can obviously increase the hardness of the alloy, and the electrical conduc-tivity almost does not change.The grain is finer with the increase of deformation when the deformation is less than 60%.But the grain will increase in coarseness when the deformation is 80%.The hardness and the elec-trical conductivity of the Cu-Cr-Sn-Zn-Y alloy can reach 172.1 HV and 70%IACS respectively after 60%cold deformation and aged at 450℃ for 1 h.