脉冲电流对铸造ZA27合金中缩孔和疏松的影响  

Effect of electric current pulse on shrinkage cavity and porosity in casting ZA27 alloy

作　　者：高明[1] 何冠虎[1] 杨菲[1] 郭敬东[1] 原正兴[2] 水丽[2] 周本濂[1] 

机构地区：[1]中国科学院金属研究所 [2]沈阳工业学院材料系,沈阳110006

出　　处：《中国有色金属学报》2001年第5期824-826,共3页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目 ( 5 988910 1)

摘　　要：在砂型铸造ZA2 7合金的凝固过程中用脉冲电流进行处理 ,结果表明这种处理方法可以提高铸件的致密性 ,大大减少铸件中的缩孔和疏松。脉冲电流处理后铸件密度增加 2 .5 %。The ZA27 alloy cast in a sand mould was treated with electric current pulse (EP)during the solidification. The experiment result indicates that the treatment of the electric current can apparently reduce the shrinkage cavity and the porosity. The density of the casting after treating with EP increases by 2.5% than that before EP. The current pulse applied in the solidification can also affect the distribution of the defects in the casting.

关 键 词：脉冲电流 缩孔 疏松 铸造锌合金 

分 类 号：TG291[金属学及工艺—铸造] TG146.13[一般工业技术—材料科学与工程]