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结合铸坯的冷却规律,利用有限差分法对二维凝固传热数学模型进行了差分变换求解。结合拉速、钢种和过热度,建立了铸坯二冷配水控制模型。利用Visual Basic 6.0开发了二次冷却仿真软件,模拟了铸坯的凝固传热过程,对二冷配水进行了优化。通过验证,新模型和二次冷却仿真软件可以对二次冷却配水量进行有效优化,经过优化,铸坯表面温度误差在3.8℃,温度波动减小,提高了铸坯质量。
According to the cooling rule of billet, finite difference method is used to solve the two-dimensional solidification heat transfer mathematical model. Combined with casting speed, steel grade and superheat, a secondary cooling water distribution control model was established. The secondary cooling simulation software was developed by using Visual Basic 6.0 to simulate the solidification and heat transfer process of slab and optimize the secondary cooling water distribution. Through the verification, the new model and the secondary cooling simulation software can effectively optimize the secondary cooling water distribution. After optimization, the surface temperature error of the slab is 3.8 ℃, the temperature fluctuation is reduced, and the slab quality is improved.