(1. 中国科学院金属研究所， 沈阳 110015;
2. 沈阳师范学院 物理系， 沈阳 110031;
3. 沈阳工业学院 材料系， 沈阳 110006)
摘 要: 在砂型铸造ZA27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%。电流对铸件中缩孔的分布也有影响。
关键字: 脉冲电流； ZA27合金； 缩孔；疏松
and porosity in casting ZA27 alloy
（1. Institute of Metal Research， Chinese Academy of
Sciences， Shenyang 110015, P.R.China;
2. Department of Physics， Shenyang Normal College，
Shenyang 110031, P.R.China;
3. Department of Material Science， Shenyang Institute of
Technology, Shenyang110015, P.R.China）
Abstract: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.
Key words: electric current pulse；ZA27 alloy；shrinkage cavity；porosit
