时效处理对Cu-Co-(Ti)合金力学和电学性能影响  

Effects of aging treatment on mechanical and electrical properties of Cu-Co-(Ti) alloys

作　　者：杨惠雅 谢宏斌 关慰勉 孟亮 王宏涛 刘嘉斌[1] YANG HuiYa;XIE HongBin;GUAN WeiMian;MENG Liang;WANG HongTao;LIU JiaBin(School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China;Institute of Applied Mechanics,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学材料科学与工程学院,杭州310027 [2]浙江大学应用力学研究所,杭州310027

出　　处：《中国科学：技术科学》2019年第10期1208-1214,共7页Scientia Sinica(Technologica)

基　　金：国家重点研发计划(编号:2017YFB1200800);浙江省科技计划(编号:2017C31076);国家自然科学基金(批准号:11572281);中央高校基本科研经费(编号:2018XZZX001-05)资助项目

摘　　要：本文设计开发了一种无毒耐高温的高强高导铜合金,用以替代Cu-Co-Be合金材料.通过熔铸法制备了Cu-0.13 wt%Co及Cu-0.06 wt%Co-0.08 wt%Ti合金,并对其进行了固溶、冷轧、时效处理.测试合金时效后硬度和电导率变化,同时采用金相显微镜和透射电子显微镜观察合金显微组织,分析其组织与性能的关系.研究发现,合金在400℃时效时,随着时效时间的延长, Cu-0.13 wt%Co合金电导率轻微上升,硬度大幅度降低;Cu-0.06 wt%Co-0.08 wt%Ti合金电导率逐渐升高,时效24 h后硬度几乎保持不变,抗软化性能良好.时效前两种合金组织中均无第二相,经400℃时效24 h后Cu-0.06 wt%Co-0.08 wt%Ti合金中析出CoTix相,平均尺寸为15 nm.析出相产生的时效硬化作用和净化基体作用是Cu-0.06 wt%Co-0.08 wt%Ti合金具有良好力学和电学性能的关键.A non-toxic and high-temperature resistant high strength and high electrical conductivity copper alloy was designed to replace CuCo-Be alloys in this work. The Cu-0.13 wt% Co and Cu-0.06 wt% Co-0.08 wt% Ti alloys were prepared by melting method and subjected to solid solution, cold rolling and aging treatments. The changes of hardness and electrical conductivity of the alloys during aging were tested. The microstructure of the alloys was observed by metallographic microscope and transmission electron microscope. The results showed that when the Cu-0.13 wt% Co alloy was aged at 400°C, the electrical conductivity was slightly increased while the hardness was greatly reduced with the prolongation of aging time. The electrical conductivity of the Cu-0.06 wt%Co-0.08 wt% Ti alloy was obviously increased and the hardness remained almost unchanged after aging for 24 h at 400°C. There was no second phase in both alloys before aging treatment. The CoTix precipitates were found in the Cu-0.06 wt% Co-0.08 wt% Ti alloy after aging at 400°C. The average size of the precipitates was 15 nm. The effects of age-hardening and matrix-purification of the precipitation were the keys to obtain good mechanical and electrical properties of the Cu-Co-Ti alloys.

关 键 词：CU合金 时效 显微组织 性能 

分 类 号：TP[自动化与计算机技术]