The alloy’s solidifying microstructure has a great effect on the mechanical properties of casting parts and its application fields. In the paper

the research of pouring temperatures and cooling rates on the alloy’s solidifying microstructures has been studied with AlSi7Mg alloy. The results show that the pouring temperatures and cooling rates have a large influence on its solidifying microstructures. When the molten was poured at liquidus temperature

a uniform and fine microstructure would be obtained. While the effecting law of cooling rates on solidifying microstructure was different from that of pouring temperatures. Based on the above results

an ideal solidifying microstructure would be obtained when the molten liquid was poured to graphite cavity at liquidus temperature.