中厚板精轧过程的高精度温度预测模型

从设定模型角度结合中厚板精轧过程的工艺特点,分析了热辐射和对流、高压水除鳞、轧辊的热传导和塑性功对钢板温度变化的影响,得出如下结果:①钢板热辐射和对流过程可以简化成一维热传导方程,钢板的黑度可考虑成钢板厚度的函数;②高压水除鳞过程可以简化成半无限体平板的瞬态热传导模型;③轧辊的热传导过程可简化成两个半无限体之间的热传导过程,接触热阻的影响通过修正系数进行调节;④塑性功造成的温度变化必须考虑热功转化效率的影响·通过与实际数据的比较可以看出该模型具有很好的预测精度·

High-Precision Temperature Prediction Model for Plate Finishing Rolling Process

Base on the plate finishing rolling process, the temperature predition model of the plate was developed by consideration of the influence of radiation, convection, high-pressure water descaling, roll conductivity and deformation energy. It is shown that plate radiation and convection can be simplified as one-dimensional thermal conductivity. The plate blackness is the function of plate gauge. The influence of high-pressure water descaling was simplified as transient thermal conductivity model of semi-infinite flat body. The roll conductivity was simplified as the thermal conductivity model between Two semi-infinite bodies and the influence of contact thermal resistance was adjusted through correction coefficient. The temperature variation due to deformation energy was considered by adjusting the thermal power efficiency parameter. By comparing with the measure data, good predict precision of the model is proved.