二次曲线模型求解中厚板轧制过程中的温度场

针对中厚板轧制过程中温度场不易精确模拟,普通温度模型计算存在误差较大的问题,通过建立二次曲线模型来计算中厚板轧制过程中的温度场,即对中厚板的轧制过程进行一定的简化,用二次曲线逼近中厚板轧制时沿厚度方向上的温度场,并在该曲线的基础上得出二次曲线模型和其计算方法．利用该二次曲线模型对Q235轧制过程中的温度场进行解析．结果表明,二次曲线模型预报精度的相对误差可以控制在3％以内,完全能够满足中厚板在线实际生产的需求．二次曲线模型同时也为其他热轧的温度场解析控制提供了范例．

Solution to Temperature Field in Plate Rolling Process by Quadratic Curve Model

It is difficult to simulate precisely the temperature field in plate rolling process and the precision of commonly used temperature models are not high. So, a quadratic curve temperature model is developed to computer the temperature field on plate. Based on it, the plate rolling process is simplified to a certain degree to approximate the quadratic curve to the real temperature field along the thickness of plate. Thus, a specific quadratic curve model is obtained with relevant computation method provided. The model has been applied to the temperature field in the rolling process of the Q235A steel slabs. The result indicates that the relative error is within 3%, if using the model to predict related temperatures, which can meat satisfactorily the requirements for on-line plate rolling. The model can also play a role as example in analyzing and controlling other temperature fields in hot rolling.