Sr对6A02铝合金组织和性能的影响  

Effect of Sr on the Microstructure and Properties of 6A02 Aluminum Alloy

作　　者：杨占寿[1,2] 曹海艇 李波 郭晓瑛[1,2] 祁米香 YANG Zhan-shou;CAO Hai-ting;LI Bo;GUO Xiao-ying;QI Mi-xiang(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China;Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources,Xining,810008,China)

机构地区：[1]中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁810008 [2]青海省盐湖资源综合利用工程技术中心,青海西宁810008

出　　处：《盐湖研究》2020年第2期50-55,共6页Journal of Salt Lake Research

基　　金：青海省重点企业技术创新项目,项目编号:JC-2017-28。

摘　　要：通过电磁感应炉制备了含锶6A02铝合金,对制备的试样采用OM、XRD、硬度测试、拉伸测试,研究Sr含量对6A02铝合金组织和性能的影响。结果表明Sr元素的加入可以细化合金的铸态组织,改变组织形貌。当Sr含量为0.5%时,细化效果最好,合金其力学性能最优。随着Sr含量的增加,6A02铝合金出现新相Al 4Sr,随着组织中Al 4Sr相增多,Mg 2Si相的析出减少,减弱了对合金的强化效果,合金的力学性能呈下降趋势。Strontium containing 6A02 aluminum alloy was prepared by electromagnetic induction furnace.The OM,XRD,hardness test and tensile test were used to study the effect of Sr content on the microstructure and properties of 6A02 aluminum alloy.The results show that the addition of Sr element can refine the as-cast microstructure and change the microstructure and morphology of the alloy.When the content of Sr is 0.5%,the refinement effect is the best and the mechanical properties of the alloy are the best.With the increase of Sr content,the new phase Al 4Sr appears in 6A02 aluminum alloy,and the precipitation of Mg 2Si phase decreases with the increase of Al 4Sr phase in microstructure,which weakens the strengthening effect of the alloy and decreases the mechanical properties of the alloy.

关 键 词：6A02 铝合金 SR 组织 力学性能 

分 类 号：TG166.2[金属学及工艺—热处理]