热轧带钢X80超快冷出口温度高精度控制方法

针对X80管线钢超快冷生产过程,基于传热学基本理论,建立了超快冷温度控制模型.通过对带钢超快冷过程温度场模拟,开发了X80管线钢超快冷控制策略,得出超快冷以均匀模式开启初始组态并采用正向增开策略有利于超快冷精度的提高及带钢芯表温差的减小.针对工艺条件波动对控制精度的影响,开发了超快冷自适应系统,实现了带钢超快冷出口温度实时及卷间修正.现场应用取得良好效果,为控冷工艺的实施提供支撑.

High Precision Outlet Temperature Control Methods of Ultra Fast Cooling for X80 Hot-Rolled Strips

According to the rolling process of X80 pipeline steels and the basic theories of heat transfer， a cooling control model of ultra-fast cooling (UFC) was established. A UFC control strategy of X80 pipeline steel was developed by simulating the temperature field of UFC process for the steel strip. The results showed that the uniform mode starting initial configuration and the use of forward additional strategies were benefited for the high UFC control precision and low temperature deviation between the steel centre and surface. To deal with influences of the technological condition fluctuations， an adaptive system of UFC was developed to correct temperature deviation in real-time and that between steel coils at UFC outlet. A satisfied result was achieved in field practice， which provided technology supports for the implementation of controlled cooling process.