Sr和Y对Mg-3Al-1Zn镁合金组织细化的影响  

Effects of Strontium and Yttrium on Microstructure Refinement of Mg-3Al-1Zn Magnesium Alloy

作　　者：杨明波[1,2] 潘复生[2] 李忠盛[2] 程仁菊[2] 

机构地区：[1]重庆工学院材料科学与工程学院,重庆400050 [2]重庆大学材料科学与工程学院,重庆400030

出　　处：《铸造》2009年第5期476-478,481,共4页Foundry

基　　金：国家杰出青年基金项目(50725413);重庆市科技攻关项目(CSTC-2006AA4012-9-6)

摘　　要：研究Sr和Y对Mg-3Al-1Zn镁合金组织细化的影响结果表明,添加0.01%～0.1%Sr和0.3%Y均可细化Mg-3Al-1Zn镁合金晶粒,其中添加Sr较添加Y可使Mg-3Al-1Zn镁合金具有更好的细化效果。此外,随Sr加入量从0.01%增至0.1%,试验合金的细化效率逐渐增加。Sr和Y以及不同Sr加入量对Mg-3Al-1Zn合金晶粒的细化效果差异与不同条件下Mg-3Al-1Zn合金的开始结晶温度不同有关。The effects of Sr and Y on the microstructure refinement of Mg-3Al-1Zn magnesium alloy were studied. The results indicate that adding 0.01%-0.1%Sr or 0.3%Y to Mg-3Al-1Zn alloy can refine the grains of the alloy, and adding Sr can obtain higher efficiency than adding Y. In addition, with the Sr adding amounts increasing from 0.01% to 0.1%, the refinement efficiency of the experimental alloy gradually increases. The differences in the refinement efficiency for adding Sr and Y, and for different adding amounts of Sr, are possibly related to the different initial crystal temperatures of Mg-3Al-1Zn alloy under the different conditions.

关 键 词：镁合金 Mg-3Al-1Zn合金 Sr元素 Y元素 组织细化 

分 类 号：TG146.22[一般工业技术—材料科学与工程]