Simulation of Columnar Crystal Growth of ESR Mn18Cr18N Steel by CA Method

Author of the article:ZHU Hua, ZHU Xuetong, CHEN Huiqin

Author's Workplace：School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China

Key Words：electroslag remelting (ESR); cellular automata method （CA method）; columnar crystal; solidification structure; transformation rules

Abstract：By analyzing and studying the solidification structure and microstructure characteristics of columnar grains in electroslag remelting (ESR) large ingot, the nucleation rules and non-periodic boundary conditions of the same supercooling surface perpendicular to the direction of heat dissipation are proposed. According to the ratio of the growth direction of solidification microstructure and the undercooling degree perpendicular to the growth direction of solidification microstructure, the local growth transition rule of planar cell for columnar crystal was proposed. Based on MATLAB software platform, the nucleation and growth module of columnar grain solidification structure of Mn18Cr18N ESR ingot was developed and applied to the simulation study of the nucleation and growth process of columnar grain solidification structure of solid and hollow Mn18Cr18N ESR ingot at macro and micro scales. The experimental verification shows that the developed CA method columnar crystal growth module is accurate and effective.