37Mn5连铸圆坯凝固过程数学模拟

为控制油井管用连铸圆坯质量,基于薄片移动法建立了连铸圆坯凝固传热数学模型,并应用ProCAST软件对37Mn5钢Φ150mm连铸圆坯凝固过程进行了数学模拟,铸坯表面温度模型预测结果与工业试验测温结果相一致.模拟结果表明,在过热度为(20±5)℃,拉速为2.5m.min-1条件下,可以控制结晶器出口坯壳厚度、铸坯液芯长度和铸坯表面温度在合适的范围内,有利于防止铸坯表面裂纹和内部裂纹等缺陷的产生和保证浇铸安全,并实现较高的生产率.

Mathematical Simulation of Continuous Casting Process of Round Billet Solidification of 37Mn5 Steel

To control the quality of continuous casting round billets used for oil well pipes, a mathematical model based on slice moving method was developed for the solidification and heat transfer process of the round billets. Then, a mathematical simulation was done using the ProCAST software for the solidification process of the φ150 mm round billets of 37Mn5 steel. As a result, the predicted billet surface temperature is in accordance with testing results of industrial experiments. The simulation results showed that, on the conditions that the superheat is (20 ± 5)°C, with a drawing velocity 2.5 m · min^-1, the billet shell thickness at mold exit, the liquid core length, and the surface temperature of strand can all be controlled in appropriate range to prevent the billets from surface/internal cracks and ensure the casting safety with productivity improved.