材料期刊网

结合宝钢2050热连轧层流冷却生产线，建立了带钢层流冷却过程传热数学模型，同时考虑相变潜热对带钢温度的贡献。采用实测的卷取温度，修正了带钢表面换热系数模型，模拟研究了冷却模式、速度、厚度等对卷取温度的影响。结果表明：卷取温度计算值与实测值的标准差小于14℃；相变潜热对卷取温度的贡献为28℃；冷却模式、速度、厚度是影响卷取温度的重要因素；该模型能够满足宝钢2050热连轧层流冷却卷取温度的预报精度,对实际生产具有较好的指导性作用。

An integrated process modeling system was built for hot strip rolling, in which thermal, mechanical and metallurgical processes from reheating furnace to coiling of a steel strip had been numerically and successfully coupled together, enabling to predict and analyze microstructure and property evolution during hot rolling. With the help of the powerful tool, the cooling and coiling processes during hot strip rolling at 2050 HSM of Baosteel Co., Ltd. were investigated. The heat transfer coefficient model was established and modified, the contribution of phase transformation latent heat to strip temperature was calculated, and the effect of process parameters (cooling patterns, velocity and thickness) on the coiling temperature was simulated. Results showed that Standard Deviation between measured temperature and predicted temperature is less than 14℃, the contribution of phase transformation latent heat to strip temperature is 28℃, cooling patterns, velocity and thickness are very important factors affecting coiling temperature, The simulation can help steel makers to better understand their processing.