摘要
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.
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.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2002年第5期878-881,共4页
Transactions of Nonferrous Metals Society of China
基金
Project( 5 9875 0 19)supportedbytheNationalNaturalScienceFoundationofChinaandproject( 95 0 16 7)supportedbytheNat uralScienceFoundationofGuangdongProvince
关键词
达共晶铝硅合金
快速凝固
粉末热挤压
性能
hypereutectic Al-Si alloys
rapid solidification
powder hot extrusion
properties
