Zr对铸态Mg-Sn-Pb合金显微组织的影响  

Effect of Zr on Microstructure of As-cast Mg-Sn-Pb Alloy

作　　者：张雅坤[1] 潘志强[1] 朱云鹏[1] 唐彬彬[1] 王金辉[1] 金培鹏[1] 

机构地区：[1]青海大学机械工程学院,青海西宁810016

出　　处：《铸造技术》2016年第2期205-208,共4页Foundry Technology

基　　金：青海省科技计划资助项目(2014-ZJ-709)

摘　　要：利用传统重力铸造方法,制备了Mg-4Sn-2.5Pb-(1.0-2.5)Zr镁合金。采用金相显微镜、扫描电镜、X射线衍射仪和电子探针分析了Zr对合金组织的影响。结果表明,1.0%的Zr加入Mg-4Sn-2.5Pb合金并未显著细化晶粒,使得合金中的Mg_2Sn相有沿晶界呈网状析出的趋势,在一定程度上提高了合金的抗拉强度和硬度;Mg-Sn-Pb-Zr合金没有良好的塑性。The Mg-4Sn-2.5Pb-（1.0-2.5）Zr magnesium alloy were prepared using conventional gravity casting method. Effects of Zr on microstructure of the alloy were investigated by optical microscopy, scanning electron microscopy, X-ray diffi＇action and electron probe. The results show that the Mg-4Sn-2.5Pb alloy with 1.0% Zr is not obvious in refining grain, the Mg2Sn phase in the alloy has a tendency to precipitate along grain boundary mesh. To some extent, it improves the tensile strength and hardness of the alloy. Mg-Sn-Pb-Zr alloy is out of good plasticity.

关 键 词：Mg-Sn-Pb-Zr 显微组织 力学性能 

分 类 号：TG292[金属学及工艺—铸造] TG146.22[一般工业技术—材料科学与工程]