Mg-2.5Zn-1.0Ca-xSn合金的微观组织与力学性能  

Microstructure and Mechanical Properties of Mg-2.5Zn-1.0Ca-xSn Alloys

作　　者：李东阳 李艳霞 LI Dongyang;LI Yanxia(College of Mechanical and Electrical Engineering,North China Institute of Aerospace Engineering,Langfang 065000,China;College of Materials Engineering,North China Institute of Aerospace Engineering,Langfang 065000,China)

机构地区：[1]北华航天工业学院机电工程学院,河北廊坊065000 [2]北华航天工业学院材料工程学院,河北廊坊065000

出　　处：《热加工工艺》2025年第6期89-92,共4页Hot Working Technology

基　　金：河北省高等学校科学技术研究项目(QN2016206)。

摘　　要：采用OM、SEM、XRD分析、硬度测试和拉伸试验等手段,研究了铸态Mg-2.5Zn-1.0Ca-xSn(x=0.1~2.0)合金的微观组织与力学性能。结果表明:Mg-2.5Zn-1.0Ca-xSn合金组织主要由α-Mg、Mg_(2)Ca、Ca_(2)Mg_(6)Zn_(3)和Mg_(2)Sn相组成。随着Sn含量的增加,合金的平均晶粒尺寸逐渐减小,晶界处的Mg_(2)Sn相数量逐渐增加,尺寸不断增大。随着Sn含量的增加,合金的硬度逐渐升高,抗拉强度和伸长率先升高后降低,Mg-2.5Zn-1.0Ca-1.0Sn合金的抗拉强度和伸长率均达到最高,分别为145.3 MPa和4.6%。The microstructure and mechanical properties of as-cast Mg-2.5Zn-1.0Ca-xSn(x=0.1-2.0)alloy were studied by OM,SEM,XRD,hardness test and tensile test.The results show that the microstructure of Mg-2.5Zn-1.0Ca-xSn alloy is mainly composed ofα-Mg,Mg_(2)Ca,Ca_(2)Mg_(6)Zn_(3) and Mg_(2)Sn phases.With the increase of Sn content,the average grain size of the alloy decreases gradually,the amount of Mg2Sn phase at the grain boundary increases gradually,and the size increases continuously.With the increase of Sn content,the hardness of the alloy increases gradually,and the tensile strength and elongation of the alloy increase first and then decrease.The tensile strength and elongation of Mg-2.5Zn-1.0Ca-1.0Sn alloy are highest,which are 145.3 MPa and 4.6%,respectively.

关 键 词：Mg-2.5Zn-1.0Ca-xSn合金 微观组织 力学性能 硬度 

分 类 号：TG146.22[一般工业技术—材料科学与工程]