Zr元素对Al-Mg-Si合金人工时效后组织和性能的影响  

Effects of Zr Element on Microstructure and Properties of Al-Mg-Si Alloy after Artificial Aging

作　　者：付嘉妮 杨昭[1] 邓运来[1] 吴业峰 余炯 FU Jiani;YANG Zhao;DENG Yunlai;WU Yefeng;YU Jiong(School of Materials Science and Engineering,Central South University,Changsha 410083,China)

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：《热加工工艺》2021年第18期130-132,138,共4页Hot Working Technology

基　　金：国家重点研发计划项目(2016YFB0300900)。

摘　　要：采用力学性能测试、导电率性能测试和金相组织观察和透射电镜观察等方法,研究了Zr含量对Al-Mg-Si合金导电性能和显微组织的影响。结果表明:锆含量为0.13wt%时,Al-Mg-Si合金导线获得最优的综合性能,在200℃时效时,导电率最大可达59.38%IACS,抗拉强度在96 h时效后仍为195 MPa,耐热性能优良。研究发现:在时效时,Zr对Al-Mg-Si合金中Mg/Si相的析出进程产生阻碍作用,抑制β’相的溶解和β’相的形核与长大,有利于合金的力学性能。The effects of Zr content on the electrical conductivity and microstructure of Al-Mg-Si alloy were studied by means of mechanical properties test,conductivity test,metallographic observation and transmission electron microscope observation.The results show that,the optimal comprehensive properties of Al-Mg-Si alloy conductors are obtained when the zirconium content is 0.13 wt%,when it is aged at 200℃,the electrical conductivity can reach the maximum of 59.38%IACS,and the tensile strength is still 195 MPa after 96 h aging.It is found that Zr hinders the precipitation process of Mg/Si phase in Al-Mg-Si alloy during aging,and inhibits the dissolution ofβ’phase and the nucleation and growth ofβ’phase,which is beneficial to the mechanical properties of the alloy.

关 键 词：Al-Mg-Si-Zr合金 力学性能 导电性能 人工时效 

分 类 号：TG166.3[金属学及工艺—热处理] TG156.92[金属学及工艺—金属学]