Mg-5Sn-xLa合金的铸态组织与结构分析  

Microstructure Analysis of As-Cast Mg-5Sn-xLa Alloys

作　　者：章晓萍[1] 陈云贵[1] 肖素芬[1] 唐永柏[1] 牛高[1] 魏尚海[1] 赵源华[1] 

机构地区：[1]四川大学,四川成都610065

出　　处：《稀有金属材料与工程》2009年第A01期148-150,共3页Rare Metal Materials and Engineering

基　　金：四川省科技厅重点攻关项目(04GG1589)

摘　　要：用重力铸造法制备了不同La含量的Mg-5Sn-xLa合金。用光学金相、XRD、SEM、EDS等研究手段,研究了添加量在0～6%范围时,La对Mg-5Sn铸造合金组织结构的影响。结果表明:当x≤2%时,La的加入不改变Mg-5Sn合金的相组成,合金仍由α-Mg和(α-Mg+Mg2Sn)共晶组成;当在2%<x≤6%时,合金中Mg2Sn消失,出现了富含La、Sn的新相,并且随着La含量的增加,新相的含量逐渐增加。The effect of La addition on the microstructures of gravity casting Mg-5Sn alloys was investigated by OM, XRD, SEM and EDS. It was found that when the amount of La addition was less than 2wt%, the alloy was still composed of a-Mg and eutectiv （a-Mg＋Mg2Sn）. When the amount of La addition was between 2wt% and 6wt%, the Mg2Sn phase disappeared; a new phase rich in lanthanum and tin appeared. With the increasing of La addition, the amount of this new phase was increased.

关 键 词：Mg—Sn合金 重力铸造 LA 组织结构 

分 类 号：TG131[一般工业技术—材料科学与工程]