Ag和Zr对Cu-Ag-Zr合金组织和性能的影响  

Effects of Ag and Zr on Microstructures and Properties of Cu-Ag-Zr Alloy

作　　者：宋练鹏[1] 孙伟[1] 尹志民[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《金属热处理》2006年第8期46-48,共3页Heat Treatment of Metals

基　　金：国家自然科学基金(50371106)

摘　　要：用中频熔炼-铁模激冷铸造-热轧-冷轧-热处理工艺,制备了Cu-3Ag、Cu-0.2Zr和Cu-3Ag-0.2Zr三种成分的中强高导电铜合金。通过硬度、拉伸性能和电导率测试、金相与电子显微分析等方法,研究了固溶-时效工艺对上述合金力学性能、导电性能及其组织结构的影响和变化规律。结果表明,Ag和微量Zr的添加以及时效前的预冷变形能较显著提高铜的力学性能而不明显降低其导电性;Cu-Ag-Zr合金的高强度来源于Ag的固溶强化、β-Ag与铜锆化合物粒子的析出强化;高导电性则来源于合金在时效过程中大部分Ag和Zr分别以β-Ag与铜锆化合物粒子的形式析出,合金基体接近为高导电性纯铜。The microstructures and properties of Cu-3Ag, Cu-0. 2Zr and Cu-3Ag-0. 2Zr alloys were studied using tensile test, hardness test, electrical properties measurement, metallography and TEM analysis. The results show that the addition of Ag and Zr and the cold deformation before aging can greatly increase mechanical properties of copper but not obviously decrease its conductivity ; the high strength of the Cu-Ag-Zr alloy results from solid solution strengthen of Ag and precipitation strengthen of β-Ag and Cu-Zr compound particles, the alloys have obviously aging strengthening effect. The high conductivity of the alloy is due to the alloy matrix closing to pure copper after most Ag and Zr precipitation in the form of β-Ag and Cu-Zr compound particles, respectively.

关 键 词：CU-AG-ZR合金 热处理 组织与性能 

分 类 号：TG146.1[一般工业技术—材料科学与工程]