电熔剂净化对Al－4．5wt％Cu合金宏观组织的影响

The Influence of Elec-Flux Refining on the Macrostructure of Al-4.5wt%Cu Alloy

通过对Ａｌ－４５ｗｔ％Ｃｕ合金进行的电熔剂净化处理实验，发现随着电流强度的提高，净化效果趋于提高，且晶粒的组织形态由细小的等轴晶逐渐转变为粗大的穿晶组织２在小电流净化条件下，通过循环净化技术，也可以获得同样的净化效果。

It has been found that the refining effect can be improved with increasing electric current. By means of the experiment on elec-flux refining of the Al-4.5wt%Cu alloy. Furthermore, the grain morphalogy changed from small equiaxial grain to coarse transcrystalline grain. The same refining effect also can be obtained through circulating refinement under the condition of low current.