作　　者： ; ; ; ; ; ;

机构地区： 中南大学材料科学与工程学院

出　　处： 《宇航学报》 2008年第6期2030-2035,共6页

摘　　要： 采用硬度、拉伸力学性能及导电率测试研究了Cu-0.8Cr-0.2Zr合金的力学性能和导电性能,采用金相显微镜(OM)和透射电子显微镜(TEM)观察了不同处理态合金的显微组织。研究结果表明:时效热处理过程中,合金发生回复和再结晶,同时过饱和固溶体分解析出新相,析出的纳米弥散强化相,能显著提高合金的强度,同时保持良好的导电性。Cu-0.8Cr-0.2Zr合金的最佳热处理工艺为:热轧后980℃/1h固溶处理,经70%冷变形,然后再经过450℃/4h时效处理后,硬度、抗拉强度和屈服强度分别为153HB5、29MPa和489Mpa,导电率达到85.1%IACS。研究的加工工艺实现了高强高导,获得了强度和导电率的最佳匹配。 The hardness, tensile properties and electrical conductivity of Cu-O. 8Cr-O. 2Zr alloy in different aging treatments were tested and corresponding microstructures were observed by using Optical Microscopy （OM） and Transmission Electron Microscopy （TEM） . After solution at 980℃ for lh, cold rolling with 70% reduction, and then aging at 450℃ for 4h, alloy presents a higher strength and higher electrical conductivity. Meanwhile, the hardness, tensile strength, yield strength and electrical conductivity of Cu-0.8Cr-0.2Zr alloy can reach 153HB, 529MPa, 489MPa, and 85. 1% IACS, respectively. The fine precipitates, which are formed in the decomposition of the supersaturated solid solution, result in distinct increase in the properties of the alloy. The alloy exhibits good combination of physical and mechanical properties.

关 键 词： 合金 显微组织 硬度 拉伸强度 导电率

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]