Numerical Simulation of Microstructure Formation of Spheroidal Graphite Cast Iron

The nucleation and growth models of the microstructure formation of spheroidal graphite cast iron from solidification down to room temperature were estab-lished according to the existing solidification kinetics theories. Based on the solidifocation kinetics models, a 3D finite difference code, FTStructure, has been developed to simu-late the formation of microstrucures and to predict the as-cast mechanical properties of the SG iron. The cooling curves, microstructures and Brinell hardness of SG iron speci-mens were simulated. Good agreement was obtained between the calculated results and those of experiments.