旋锻复合铜包铍铜线材的组织性能  

Microstructure and properties of copper-clad beryllium copper wire fabricated by rotary swaging

作　　者：万金风 赵帆 刘新华 WAN Jin-feng;ZHAO Fan;LIU Xin-hua(Beijing Laboratory of Metallic Materials and Processing for Modern Transportation,Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China;Key Laboratory for Advanced Materials Processing(MOE),Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China;Beijing Advanced Innovation Center for Materials Genome Engineering,Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学新材料技术研究院,现代交通金属材料与加工技术北京实验室,北京100083 [2]北京科技大学新材料技术研究院,材料先进制备技术教育部重点实验室,北京100083 [3]北京科技大学新材料技术研究院,北京材料基因工程高精尖创新中心,北京100083

出　　处：《中国有色金属学报》2023年第3期729-740,共12页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51925401);中央高校基本科研业务费专项资金资助项目(FRF-TP-19-020B1Z)。

摘　　要：采用热旋锻-拉拔方法制备了直径为1.4 mm、包覆铜层厚度均匀、界面结合良好的铜包铍铜复合线材,研究了热旋锻、拉拔、中间退火和固溶形变时效对复合线材组织性能的影响。结果表明:合理的旋锻制度为旋锻温度700℃,单道次变形量50%,旋锻两道次,可获得良好的复合界面结合质量。线材拉拔过程中的合理中间退火工艺为(600℃,1 h),此时铍铜基本完成再结晶,界面层没有发生明显增厚,线材塑性相对较好,断后伸长率为38.5%。线材合理的固溶-形变-时效工艺为经780℃固溶10 min后变形拉拔40%,然后再经320℃时效2 h。此时线材综合力电性能较好,抗拉强度为896 MPa,导电率为50.5%IACS。The copper-clad beryllium copper composite wire with diameter of 1.4 mm,uniform copper cladding layer thickness and good interfacial bonding was prepared by hot rotary swaging and drawing method.The effects of hot rotary swaging,drawing,intermediate annealing and solution-deformation-aging treatment on the microstructure and properties of the composite wire were studied.The results show that the good bonding quality of composite interface can be obtained by two passes swaging at 700℃and with 50%single pass deformation.The reasonable intermediate annealing process of composite wire is(600℃,1 h).At these process parameters,the elongation after fracture can reach 38.5%because of the basically fully recrystallization of beryllium copper and the interfacial phase is not significantly thickened.The reasonable solution-deformation-aging process of composite wire is as follows:after solution at 780℃for 10 min,the composite wire is drawn with 40%deformation,and then aged at 320℃for 2 h.At these process parameters,the comprehensive mechanical and electrical properties of wire are relatively good.The tensile strength is 896 MPa,and the electrical conductivity is 50.5%IACS.

关 键 词：铜包铍铜复合线材 旋锻 拉拔 退火 固溶-形变-时效 组织 性能 

分 类 号：TG319[金属学及工艺—金属压力加工]