Numerical Simulation of Temperature Field and Solidification Morphologies of Copper Alloy by Vacuum Continuous Casting

摘要

The purpose of this study is to predict the morphologies of the solidification process for copper alloys by vacuum continuous casting (VCC) process. In different casting speed (60～90 mm/min) and the pouring temperature (1100～1200℃), the numerical simulation system could effectively predict temperature distribution, solid fraction and grain growth patterns for copper alloy solidification process. In numerical simulation aspect, finite difference method (FDM) and cellular automaton (CA) model were utilized to solve the numerical calculations of the macro-temperature field, micro-nucleation and grain growth of copper alloy respectively. From the observed simulation results, the grain morphology has a change from axial to axial-radial growths as increasing casting speed, and has a change from axial-radial to axial growths as increasing pouring temperature. The cast grain morphology simulated by CAFD model had a good correspondent to the result of actual casting experiment.