Microstructure Evolution of Al-20Si during Continuous Cooling
Author of the article:LIU Xuan;LI Hu;LI Chun;NAN Ning
Author's Workplace：Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, Shangluo 726000, China;College of Chemical Engineering and Modem Materials, Shangluo University, Shangluo 726000, China
Key Words：high and low temperature mixing Al-20Si hypereutectic alloy primary silicon crystal roundness
Abstract：
Al and al-30si were melted in a well-crucible resistance furnace. Al-20Si temperature gradient samples were prepared by high and low temperature mixed casting process and traditional casting process. The results show that the morphology of primary silicon is better than that of traditional casting process. The grain size of primary silicon decreases with the decrease of temperature gradient, which is beneficial to grain refinement. The roundness decreases with the decrease of temperature.
