薄板坯连铸结晶器内钢水凝固传热数值模拟

为研究薄板坯连铸高拉速下结晶器内坯壳生长过程,利用ANSYS有限元模拟软件,建立了CSP薄板坯连铸结晶器内钢水凝固传热数学模型,并通过实际测量得到的凝固坯壳厚度验证了模型的合理性。对结构用钢Q235B钢种,1 500 mm×60 mm规格在结晶器内凝固过程进行了模拟,研究了不同拉速、不同结晶器冷却水量对凝固的影响。研究结果表明,随着拉速降低,坯壳厚度增加;随着结晶器水量增大,坯壳厚度增加,模拟结果与实测结果相符合,为实际生产优化工艺参数提供了理论参考。

Simulation of solidification and heat transfer for steel in mold of thin slab continuous casting

To investigate the growth process of solidified shell in the mold at high casting speed for thin slab continuous casting. A two-dimensional solidification and heat transfer finite element model was developed based on ANSYS software. The rationality of model was verified by tested shell thickness. The process of shell formation is simulated for Q235B steel 1 500 mm×60 mm shin slab, and the effect of different casting speed and mold cooling water was studied. The results show that: the thickness of billet shell increases with the decrease of drawing speed, As the cooling water flow of the mold increases, the thickness of the blank shell increases, the trend of simulation and measurement was consistent, which provide the theoretical reference for optimizing process parameters.