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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。
Achieving High Satisfaction The objective of post-rolling cooling control must rely on a highly accurate temperature field calculation model for the post-rolling cooling process control system. Taking heat conduction, air-cooling and water-cooling heat transfer coefficient as the main research objects, a mathematical model of post-rolling cooling was set up, and the air-cooling and water-cooled heat transfer coefficients were regressed. The Crank-Nicolson finite difference method was used to solve the temperature field. The model was embedded into the cooling control system of a medium-sized mill in China. The cooling tests were conducted on different steel plates with different thicknesses. The test results showed that the actual final cooling temperature and the target final cooling temperature deviation ± 10 ℃ hit rate At more than 90%, the cooling process temperature control is well achieved.