作　　者： ; ; ;

机构地区： 中南大学材料科学与工程学院

出　　处： 《稀有金属材料与工程》 2006年第10期1539-1543,共5页

摘　　要： 研究了固溶-时效处理工艺和固溶—预冷变形—时效处理工艺对Cu-Co-Cr-Si合金力学性能、电学性能及其显微组织结构的影响。结果表明,最佳形变热处理工艺为980℃固溶1h,冰盐水淬火,40%预冷变形之后480℃时效4h。合金的抗拉强度、屈服强度、延伸率、硬度和相对电导率分别达到634MPa,575MPa,8.9%,1700MPa(HB)和43.2%IACS。这种合金有显著的时效强化特性,强化相为Cr粒子、Cr3Co5Si2相和Co2Si相。合金的高强度来源于固溶强化、亚结构强化和第二相析出强化。 The effect of solution-aging and solution-cold rolling-aging processing on the mechanical properties, electrical conductivity and microstructures of Cu-2.4Co-0.8Cr-1Si alloy has been studied. The results show that the optimum processing is that solution at 980 for 1 h, ice salt water quenching, 40% pre-cold rolling then aged at 480 for 4 h. Under this condition, the tensile strength, yield strength, elongation, hardness and electrical conductivity can reach 634 MPa, 575 MPa, 8.9%, 1700 MPa （HB）, and 43.2% IACS, respectively. This kind of alloy has obvious aging strengthening characteristics. The precipitates are Cr, Cr3Co5Si2 and CozSi phases. Solution strengthening, substructure strengthening and precipitation strengthening are responsible for high strength of the alloy.

关 键 词： 合金 热处理 显微组织 力学性能 电导率

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]