以铸坯和结晶器之间的间隙热阻为纽带,考虑保护渣凝固对接触热阻和渣膜热阻的影响,建立了连铸结晶器与铸坯热力耦合模型并编写了相应的有限元仿真程序.模型预测的坯壳厚度和实验结果吻合良好,两者差值≤2 mm.应用模型分析了大方坯连铸结晶器内的传热过程和坯壳的应力分布.结果表明,随着拉速提高,凝固坯壳厚度减薄,铸坯产生角部裂纹的趋势增加.
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