微量Cr元素对Cu-Ag合金力学性能的影响  

Effect of trace Cr element on the mechanical properties of Cu-Ag alloy

作　　者：贾淑果[1] 刘平[1] 田保红[1] 任凤章[1] 郑茂盛[2] 周根树[2] 

机构地区：[1]河南科技大学材料学院,河南洛阳471003 [2]西安交通大学材料学院,陕西西安710049

出　　处：《材料热处理学报》2007年第B08期53-57,共5页Transactions of Materials and Heat Treatment

基　　金：国家高技术研究发展计划(863)项目(2002AA331110;20060103Z5036);河南科技大学引进人才专项科研基金(06-04);河南省杰出人才创新基金(0521001200)。

摘　　要：采用真空熔炼方法制备了Cu-Ag和Cu-Ag-Cr合金,通过力学性能测试、金相显微镜和透射电镜分析等方法,研究了微量Cr对Cu-Ag合金组织和性能的影响。结果表明,添加微量Cr元素能够明显提高Cu-Ag合金的再结晶温度和强度,Cu-Ag-Cr合金经450℃退火2h后的抗拉强度仍高达423MPa,能够满足高强高导铜合金高温性能的要求:微量Cr对Cu-Ag合金的强化主要来源于再结晶晶粒细化强化,第二相粒子析出强化和亚结构强化等。By means of a vacuum induction fumace, Cu-Ag-Cr and Cu-Ag alloy are produced. The influences of trace Cr dement addition on the microstructure and mechanical properties the Cu-Ag alloy were studied by means of tensile test, optical microscopy and Wansmission eleclron microscopy. The results show that the strength and rescrystaUization temperature of the Cu-Ag alloy increase effectively with the trace addition of Cr, the tensile strength reach 423MPa after annealing at 450℃ for 2h, which are satisfied for high strength and high conductivity. Fine grain strengthening, precipitation strengthening and substructure strengthening caused by trace Cr should be responsible for the strengthening of Cu-Ag alloy.

关 键 词：CU-AG-CR合金 铜合金 时效 再结晶 力学性能 

分 类 号：TG146.1[一般工业技术—材料科学与工程] TG144[金属学及工艺—金属材料]