电磁搅拌对半固态Al-20%Mg_2Si合金组织的影响  

Effect of Electromagnetic Stirring on Structure of Semi-solid Al-20%Mg_2Si Alloy

作　　者：杨淼[1] 曹志强[1] 陈东风[1] 张婷[1] 

机构地区：[1]大连理工大学铸造工程研究中心,辽宁大连116024

出　　处：《铸造》2007年第1期79-81,共3页Foundry

基　　金：国家自然科学基金资助项目(No.50274018)

摘　　要：研究了Al-20%Mg2Si过共晶合金在不同搅拌电压下凝固时的凝固组织变化,并对其进行了布氏硬度的测量。结果表明:Al-20%Mg2Si过共晶合金在电磁搅拌下出现了非搅拌凝固中所没有的-αAl相晶粒,初生Mg2Si呈簇状分布在基体上,且随着搅拌电压的升高,α-Al相晶粒尺寸减小,Mg2Si团簇尺寸增大;而且电磁搅拌下,Al-20%Mg2Si过共晶合金的硬度随搅拌电压增加而增加。The structures of Al-20%Mg2Si hypereutectic alloy were investigated under different stirring voltage, and the hardness of alloy under, different stirring voltage was investigated. The results indicated that the particles of α-Al phase, which were non-existent for non-stirring casting of Al-20% Mg2Si hypereutectic alloy, appeared for electro.magnetic agitation and the primary Mg2Si with cluster distributed on the matrix of alloy. The α-Al phase became smaller and the Mg2Sicluster became bigger when the stirring voltage rose. It was also found that the hardness of Al-20% Mg2Si hypereutectic alloy under electromagnetic stirring was greatly improved with the stirring voltage increased.

关 键 词：电磁搅拌 初生Mg2Si 硬度 

分 类 号：TG249.9[金属学及工艺—铸造]