添加Al、Sn元素对Mg-Zn-Ca合金组织和力学性能的影响  

Effect of Al and Sn Addition on Microstructure and Mechanical Properties of Mg-Zn-Ca Alloy

作　　者：白尧 董晟全[1] 何子博[1] 冯强强 BAI Yao;DONG Shengquan;HE Zibo;FENG Qiangqiang(School of Materials and Chemical Engineering,Xi'an Technological University,Xi'an 710021,China)

机构地区：[1]西安工业大学材料与化工学院

出　　处：《热加工工艺》2019年第17期19-22,共4页Hot Working Technology

基　　金：榆林市镁合金研制与开发项目(0103204040002)

摘　　要：以Mg-Zn-Ca合金为基体,同时添加1wt%Al-(0.5,1,1.5)wt%Sn元素,研究Al、Sn元素对铸造Mg-Zn-Ca合金组织和力学性能的影响。对合金进行了金相(OM)、扫描电镜(SEM)、X射线衍射(XRD)等分析,发现添加Al、Sn元素会细化基体的晶粒,而且会生成雪花状、条状和块状的新相,同时会提高铸造Mg-Zn-Ca合金的力学性能。在添加1wt%Al+1.5wt%Sn时,合金抗拉强度和断后伸长率分别由未添加Al、Sn的151MPa和2.0%提高到188MPa和3.7%。Mg-Zn-Ca alloy was used as the matrix, and 1wt%Al-(0.5, 1, 1.5)wt%Sn elements were added to study the effect of Al and Sn on the microstructure and mechanical properties of as-cast Mg-Zn-Ca alloy.The alloy was analyzed by metallographic (OM), scanning (SEM) and X-ray (XRD).It is found that the addition of Al and Sn elements refines the grains of the matrix and produces snowflake, strip and block phases.The new phase can improve the mechanical properties of as-cast Mg-Zn-Ca alloy.When 1 wt% Al + 1.5 wt% Sn is added, the tensile strength and elongation after fracture of the alloy increase from 151 MPa and 2.0% without Al, Sn addition to 188 MPa and 3.7%, respectively.

关 键 词：铸造Mg-Zn-Ca合金 Al-Sn元素 组织 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG243[金属学及工艺—金属材料]