变速轧制下超快冷系统工艺温度在线实时修正策略

摘要 结合某现场超快速冷却系统，具体分析了带钢运行速度变化对轧后冷却过程换热系数与冷却时间的影响规律.根据速度运行机制，开发了速度在线修正计算策略，实现了轧后冷却区带钢速度计算值与实际值的吻合;并在此基础上开发的工艺温度在线循环计算策略，消除了速度波动对温度控制的影响，提高了温度控制精度.将该温度在线实时修正策略应用于现场，实现了超快冷出口温度与卷取温度的精确控制，工艺温度命中率在96%以上，有效消除速度对温度波动的影响，完全满足新产品、新工艺的工业化试制及大批量生产.
Abstract：Based on the ultra-fast cooling system of a certain plant， the effect of various velocity of hot-rolled strip on the transfer coefficient and cooling time was analyzed. According to the velocity mechanism during producing， on-line corrected control strategy of velocity was developed and the calculated velocity is accurately matched the measured value. Based on the above strategies above， an on-line correction strategy for processing temperature was developed to eliminate the influence of velocity fluctuation on temperature deviation so that the accuracy to control processing temperature was improved. By proposing such on-line correction strategy to an on-site operation， the ultra-fast cooling delivery temperature and coil temperature can be well controlled， the temperature deviation affected by velocity fluctuation is effectively eliminated， and the hit rate of process temperature is more than 96%， which lays solid foundation for new product development and mass industrialized production.