中厚板冷却过程高精度温度模型

实现高满意度轧后冷却控制目标必须依赖于轧后冷却过程控制系统高精度的温度场计算模型。以钢板内部热传导、空冷及水冷换热系数为主要研究对象,建立了轧后冷却数学模型,回归了空冷和水冷换热系数,采用Crank-Nicolson有限差分法求解钢板温度场。将该模型嵌入到国内某中厚板厂轧后冷却控制系统,对不同钢种不同厚度钢板进行轧后冷却试验,试验结果表明,实际终冷温度和目标终冷温度偏差±10℃的命中率在90%以上,很好地实现了冷却过程温度控制。

High-Precision Temperature Model for Medium Plate Cooling Process

High-precision temperature field model is the main factor to achieve high satisfaction control objectives for plate cooling process. As the main object of study, internal heat conduction, air-cooled and water-cooled heat transfer coefficient are investigated concretely and the mathematical models for plate cooling process were established. The regression work of heat transfer coefficient was done, using Crank-Nicolson finite difference method to solve the temperature field of plate. Embed this model into controlled cooling system in some plant factory, and cooling experiment are carried out on different steel grade and different thickness plate, the data tested indicate that the deviation between ℃ and ℃ of actual stop cooling temperature and objective stop cooling temperature is above 90%,well achieved cooling process temperature control .