沟槽结晶器初生坯壳热力耦合模拟研究

Thermo-Mechanical Coupled Simulation of Initial Shell Formation in Grooved Mold of Slab Caster

针对钢在板坯连铸结晶器内的凝固过程,建立二维完全热力耦合有限元分析模型。应用Marc软件在计算机上运行求解,模拟在结晶器铜板内壁划分不同间距纵向沟槽时的铸坯形成过程,研究划分沟槽对坯壳形成过程的影响。结果表明:沟槽可改善结晶器铜板与坯壳间传热,有利于坯壳的均匀形成,削弱偏角区应力集中,降低裂纹发生可能性。

To describe the solidification in caster mold, a two-dimensional fully thermo-mechanical coupled finite element model was established. The model is solved with MSC Marc software. The solidification of slab in the molds with longitudinal parallel grooves separated by different intervals on the inner surface was simulated. The influence of grooves on the solidification of slab was studied. The results show that heat transfer between mold and initial solidified shell is improved by grooves. So grooving is beneficial to the uniform shell growth, and reduction of stress concentration and cracking.