Ce对AZ31镁合金中离异共晶β相的影响  

Effects of Ce on the Divorced Eutectic β Phase in the AZ31 Magnesium Alloy

作　　者：蒋百灵[1] 张继源[1] 夏鹏举[1] 

机构地区：[1]西安理工大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2008年第2期99-102,共4页Special Casting & Nonferrous Alloys

基　　金：陕西省教育厅科学技术研究计划资助项目(07JK210)

摘　　要：研究了凝固过程中的冷却速度和稀土Ce加入量对AZ31合金凝固组织中离异共晶β相的生长方式、形貌、特征和数量的影响。结果表明,Ce的加入改变了合金的组织形貌,当加入量增至0.6%时,离异共晶β相从厚壁近乎连续的网状转变成不连续短棒状或粒状分布;组织中离异共晶β相的总量随冷却速度的减小而减少;物相分析发现有Mg-Al-Zn-Ce化合物生成。The effects of cooling rate and Ce addition on the growth behavior,appearance,characteristics and numbers of the divorced eutectic β phase in microstructure of the AZ31 magnesium alloy have been analyzed.The results reveal that Ce addition can greatly influence the microstructure of the alloy.The divorced eutectic β phase in the AZ31 magnesium alloy is converted from continuous net-like structure into discontinuous short rod or particle with the Ce addition increasing to 0.6%,and its amounts are decreased with the declination of cooling rate.In addition,Mg-Al-Zn-Ce compound can be observed in the alloy.

关 键 词：镁合金 离异共晶 冷却速度 稀土Ce 

分 类 号：TG146.22[一般工业技术—材料科学与工程]