中文摘要：

利用ProCast模拟软件计算了45钢的热物性参数,利用MILE算法对45钢小方坯结晶器内温度场和应力场进行了动态模拟。结果表明铸坯表面温度沿拉坯方向逐渐降低,凝固层温度由凝固前沿向铸坯表面降低。铸坯表面应力在结晶器内不断增大,由于凝固收缩铸坯与结晶器间产生气隙。在同一位置不同时刻铸坯表面温度、应力存在差异,但温度和应力的最大值出现在角部,出结晶器口处,角部温度为1 065℃,应力为26.6 MPa。

英文摘要：

The thermal physical parameters of 45 steel were calculated by ProCast simulation software. The temperature and stress distribution of a billet of 45 steel were simulated based on MILE method. The results show that the surface temperature of the billet decreases gradually along the casting direction. At a certain position, the temperature of molten steel decreases from the solidification front to the surface of the billet. The surface stress of the billet continuously increase in the mold, and due to the solidification shrinkage, air-gap produces between billet and mold. In the same position, the surface temperature and stress is different at different times, but the maximum value of temperature and stressappear occur in the comer, out of the mold mouth, the comer temperature is 1 065℃, the stress is 26.6 MPa.