大断面立式半连铸坯凝固微观组织的数值模拟  

Numerical Simulation of Solidified Microstructure of Vertical Semi-continuous Casting Slab with Large Cross Section

作　　者：张冬晓[1] 常庆明[1] 方健[1] 王丽[1] 潘成刚[1] 

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081

出　　处：《铸造技术》2015年第9期2271-2275,共5页Foundry Technology

基　　金：国家自然科学基金资助项目(51074116;51375353);湖北省教育厅科学技术研究计划重点项目资助(D20101110)

摘　　要：根据半连续铸造过程的特点,以尺寸为2 800 mm×900 mm的大断面板坯为研究对象,建立了有限元(Finite Element)和元胞自动机法(Cellular Automaton)相结合的CA-FE模型,模拟计算了半连续铸造凝固过程的温度场和三维微观组织。探讨了过热度、拉坯速度、二冷强度等因素对板坯微观组织的影响。According to the characteristics of vertical semi-continuous casting, a CA-FE model was established by coupling the fmite element and cellular automaton method for a large cross-section slab of 2 800 mm - 900 mm, the temperature distribution and 3D microstructure of the slab in solidification process of semi-continuous casting are simulated. The influences of superheat, casting speed, second cooling intensity on the solidification microstruc^tre were investigated and discussed.

关 键 词：半连铸 CA-FE 微观组织 数值模拟 

分 类 号：TG249.7[金属学及工艺—铸造]