薄板坯连铸液芯压下过程的数值仿真

NUMERICAL STUDY OF THE LIQUID CORE REDUCTIONDURING THIN SLAB CONTINUOUS CASTING

基于修改的拉格朗日大变形热力耦合有限元模型，对薄板坯连铸的重要技术——液芯压下技术进行了仿真研究，并与实验结果进行了对比，两者基本吻合。研究结果显示，连铸坯经过压下辊的过程中，其应力状态发生较大的变化。研究表明，控制和优化连铸坯窄面附近区域的冷却条件是控制连铸坯窄面附近区域应力和变形的重要手段，采用提高连铸坯窄面附近区域的冷却模式。

Liquid core reduction technology, one of the most important new technologies for thin slab continuous casting,was studied in this paper, using updated Lagrangian Large deformation thermomechanical coupling FEM model The numerical results agreed with the experimental results The research results demonstrated that the stress varies significantly when slab goes through the LCR rolls Controlling and optimizing cooling conditions around narrow sides of slab is an important means to control the stress and deformation of the slab prevent the internal crack and make implementation of LCR successful