高温纯铝低温高硅铝合金熔体混合对组织的影响  

Effects of Melt Mixture on Microstructure of Superheat Aluminum and Semi-Solid Hypereutectic Al-Si Alloy

作　　者：罗松[1] 魏晓伟[1] 郑丽[1] 王小丽[1] 

机构地区：[1]西华大学材料科学与工程学院,四川成都610039

出　　处：《铸造》2013年第4期337-339,共3页Foundry

基　　金：四川省材料加工工程重点学科资助项目(SZD0502-09-1)

摘　　要：通过过热纯铝液与半固态过共晶铝硅合金熔体混合,研究了凝固组织的变化,并对比了750℃熔炼浇注与常规熔体混合两种方法对组织的影响。结果表明,前者所得的合金凝固组织兼具亚共晶和过共晶铝硅合金组织特征,并且能很好地细化初生Si相。后两种方法所得合金只具有一般过共晶铝硅合金组织特征,且对初生Si相的细化效果不显著。Through mixing the superheat aluminum and semi-solid hypereutectic AI-Si alloy melt, the changes in solidification microstructure of alloy were studied. The results show that the alloy obtained by the first method has the characteristics of both hypoeutectic and hypereutectic Al-Si alloy, and the apparent refinement of primary silicon occurs. The alloys obtained by the latter two methods have only structural characteristics of hypereutectic AI-Si alloy, and primary silicon refinement effect was not significant.

关 键 词：AL-SI合金 熔体混合 显微组织 初生硅 

分 类 号：TG292[金属学及工艺—铸造]