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 orig...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 a 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 a phase aggregates with the primary a phase and the eutectic silicon pieces aggregate together. The elongation of the semi-solid component after heat treatment rises to 1.42%.展开更多
文摘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 a 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 a phase aggregates with the primary a phase and the eutectic silicon pieces aggregate together. The elongation of the semi-solid component after heat treatment rises to 1.42%.
