Rapidly solidified hypereutectic Al-Si alloys prepared by powder hot extrusion

来源期刊：中国有色金属学报(英文版)2002年第5期

论文作者：李元元 张大童 张卫文

文章页码：878 - 881

Key words：hypereutectic Al-Si alloys; rapid solidification; powder hot extrusion; properties

Abstract: Rapidly solidified hypereutectic Al-Si alloys were prepared by powder hot extrusion. By eliminating vacuum degassing procedure, the fabrication routine was simplified. The tensile fracture mechanisms at room temperature and elevated temperature were investigated by SEM fractography. Compared with KS282 casting material, the tensile strength of rapidly solidified Al-Si alloy is greatly improved due to silicon particles refining while its density and coefficient of thermal expansion are lower than those of KS282. The wear resistance of RS AlSi is better than that of KS282.