Influence of Casting Temperature and Mold Preheating Temperature on Centrifugal Casting by Numerical Simulation

Reasonable selection of process parameters can adjust the temperature and velocity fields of the metal liquid in the mold cavity to obtain the desired casting organization. In this paper, the temperature and flow fields of the high molybdenum cast iron casting were simulated at different casting temperatures and mold preheating temperatures, respectively. The results show that casting temperature has little effect on the filling rate, but it has a strong effect on the movement state of the metal liquid. When the casting temperature is 1430 °C, the flow field is smooth. At higher or lower casting temperature, the metal liquid appears to split strands or splash, and it is prone to defects such as cold gap after solidification. The higher casting temperature and mold preheating temperature, the slower the solidification rate. Mold preheating temperature is the key influencing factor for the solidification rate and cooling time of the casting. There is a nearly linear relationship between cooling time and mold preheating temperature, and the cooling time of the casting increases with every 50 °C increase in mold preheating temperature, but the magnitude of the increase has been decreasing.