Mn18Cr18N电渣重熔钢柱状晶生长的CA法模拟研究  

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

作　　者：朱花 朱雪彤 陈慧琴[1] ZHU Hua;ZHU Xuetong;CHEN Huiqin(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024

出　　处：《铸造技术》2021年第5期412-419,共8页Foundry Technology

基　　金：国家自然科学基金项目(51575372)。

摘　　要：通过分析研究电渣重熔大型钢锭柱状晶凝固组织的形成规律和微观形貌特征,提出了垂直于散热方向的等过冷度面形核规则和非周期性边界条件。根据柱状晶凝固组织生长方向和垂直于生长方向的过冷度比值,提出了柱状晶的平面元胞局域长大转变规则。基于Matlab软件平台,开发了Mn18Cr18N电渣重熔(ESR)钢锭柱状晶凝固组织的形核和长大模块,并应用于Mn18Cr18NESR钢实心和空心钢锭宏微观尺度柱状晶凝固组织的形核与长大过程的模拟研究。实验验证表明,开发的CA法柱状晶生长模块的准确性和有效性。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 solidifcation 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 effctive.

关 键 词：电渣重熔 元胞自动机法(CA法) 柱状晶 凝固组织 转变规则 

分 类 号：TF771[冶金工程—钢铁冶金]