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基于建立的二维瞬态热/力耦合有限元模型,模拟计算了国内某钢厂实际板坯连铸工况下结晶器内某高强船板钢凝固过程的热行为,并利用现场实测温度数据验证了模型的可靠性.在此基础上重点研究分析了该钢在结晶器凝固过程角部区域气隙厚度、坯壳-铜板间的保护渣(包括液渣层和固渣层)分布及其热行为变化规律和对应区域的热流与表面温度变化特征,并揭示了拉速、结晶器锥度和保护渣性能变化对该钢种在结晶器内凝固热行为的影响.
Based on the established two-dimensional transient thermal / mechanical coupled finite element model, the thermal behavior of the solidification process of a high-strength steel plate slab in a mold during the actual slab continuous casting process in a domestic steel mill was simulated and calculated. Based on the field measured temperature data The reliability of the model was verified, and the thickness of the air gap in the corner area of the mold during the solidification of the mold, the distribution of the protective slag (including the liquid slag layer and the solid slag layer) between the shell and the copper plate, Thermal behavior and corresponding changes of heat flux and surface temperature. The effects of casting speed, mold taper and mold flux on the thermal behavior of the steel in the mold were also investigated.