复合变质对高硅铝合金力学性能的影响

Influence of compound modification on the mechanical properties of high silicon alumimum alloy

对含硅量为 2 0 %～ 2 5 %的高硅铝合金采取了磷、砷和碲复合变质处理进行了研究。在实验条件下 ,初晶硅明显细化为团块或团球状 ,σb 提高了 17%～ 44 % ,延伸率δ提高了 2 8%～ 5 3%。

The modification, with a compound modifier consisting of phosphor, arsenic and tellurium, for aluminum alloy containing 20～25% silicon is studied. The result shows that the primary silicon phase is found remarkably and becomes block or nodular shape. Accordingly, the tensile strength increases about 17～44% and the elongation increases about 28～53%.