Semi-solid squeeze casting process of a ZL109 alloy

• 作 者: ZHAI Yanbo LIU Changming HAN Zhaotang WANG Kai
• 机 构: College of Mechanical Engineering, Chongqing University, Chongqing 400044, China
• 出 处: 稀有金属（英文版）
• 发表日期: 2008年3期
• 关键词: ZL109 alloy mechanical property semi-solid squeeze casting semi-solid remelting

The structure evolution of the ZL109 alloy in the process of semi-solid squeeze casting and the mechanical properties of the components were investigated. The results show that (1) the eutectic silicon phase in original billets is refined in the low super-heat casting process; (2) the eutectic structure in billets starts to fuse and the crystals of the eutectic silicon phase are refined further and sphericized in the remelting process of billets; (3) in the semi-solid ,squeeze casting process, the sphericity of the α phase and the refining of the silicon phase occur, owing to the friction between solid and liquid; (4) in the process of heat treatment, the eutectic α phase aggregates with the primary α phase and the eutectic silicon pieces aggregate together. The elongation of the semi-solid component after heat treatment rises to 1.42%.