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运用有限元分析法模拟了浸入式水口实际预热后的温度场以及浇钢过程中的瞬态温度场和热应力场的分布。结果表明:浸入式水口在浇钢过程中突然受到高温钢水的冲击,在短时间内温度变化剧烈,水口颈部至上表面温度变化明显,且呈阶梯状分布;水口与钢水接触的内壁热应力值很小,外壁热应力大于内壁,随着浇钢时间的增加,热应力分布范围沿水口径向逐渐减小;预热温度越高,浇钢时的热应力越低。
Finite element analysis was used to simulate the temperature field and the transient temperature field and thermal stress field in the preheating submerged nozzle. The results show that the submerged entry nozzle is suddenly subjected to high temperature molten steel during the process of steel pouring. The temperature changes sharply in a short period of time, and the temperature changes from the neck to the upper surface obviously. Small, the external wall thermal stress is greater than the inner wall, with the increase of pouring time, the thermal stress distribution along the radial direction of the radial decreases; the higher the preheating temperature, the lower the thermal stress when pouring steel.