Effect of Electric Current Pulse on the Shrinkage Defect in the Casting ZA27 Alloy

摘要

The ZA27 alloy cast in the sand mould was treated with electric current pulse (EP)during the solidification. The experiment result indicated 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 percent than that before EP. The current pulse applied in the solidification can also affect the distribution of the defects in the casting.