Abstract: In the production processes of ultra-high strength steel in six-stand tandem cold rolling mill, due to the number of stands, complex control processes and insufficient control ability of each stand, the flatness and cross-sectional shape of the finished products were out of tolerance. Based on the prediction model of strip flatness and sectional shape of ultra-high strength steel in cold rolling processes, a feedforward control strategy of strip flatness and sectional shape of ultra-high strength steel in cold rolling processes was analyzed. Then, the method of setting the target flatness curve of each stand was proposed based on the incoming materials, and the feedforward control technology of ultra-high strength flatness and sectional shape of six-stand tandem cold mill was developed. And, the control method was applied to a six-stand tandem cold rolling mill in a steel plant. The control ability of each stand is fully developed, and the flatness of the finished products is 12.5% higher than that before the application of the technology, and the sectional shape distribution is more uniform, which has the values of further promotion and applications.

Key words: six-stand tandem cold mill, ultra-high strength steel, flatness, sectional shape, feedforward control

摘要： 针对六机架冷连轧机组超高强钢生产过程中因机架数多、控制工艺复杂、各机架控制能力得不到充分发挥而导致成品平直度与断面形状超差的问题，充分结合六机架冷连轧机组的设备与工艺特点，基于超高强钢冷轧过程平直度与断面形状预报模型，分析了超高强钢冷连轧过程平直度与断面形状前馈控制策略，提出了基于来料的各机架出口目标平直度曲线设定方法，开发了适合于六机架冷连轧机组的超高强钢平直度与断面形状前馈控制技术。将该技术应用到某钢厂六机架冷连轧机组，各机架控制能力得到了充分发挥，成品平直度比该技术应用前提高了12.5%，且断面形状分布更加均匀，具有进一步推广应用的价值。

关键词: 六机架冷连轧机组, 超高强钢, 平直度, 断面形状, 前馈控制