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针对厚度小于2.0mm的热轧薄带全长卷取温度均匀性较差的问题,在分析升速轧制制度、终轧温度控制方式、带钢板形及轧制稳定性等因素对卷取温度均匀性影响的基础上,提出一种沿带钢全长变目标终冷温度的设定策略,目标终冷温度偏离目标卷取温度的程度可用温度补偿值来表征,卷取温度模型可根据各控制点距带钢头部或尾部起始点的距离,按照相应的温度偏差和斜率进行计算。现场应用表明:该策略可显著提升1.55mm厚的集装箱板、1.80mm厚的镀锡基板等热轧薄带的卷取温度均匀性。
In view of the problem of the poor uniformity of the coiling temperature of the hot-rolled strip with the thickness of less than 2.0 mm, the factors such as the speed-up rolling system, the finishing temperature control mode, the strip shape and the rolling stability, Based on this, a strategy of setting the final cooling temperature along the full length of the strip is proposed. The degree of deviation of the final cooling temperature from the target coiling temperature can be characterized by the temperature compensation value. The coiling temperature model can be adjusted according to each control The distance from the starting point of strip head or tail point is calculated according to the corresponding temperature deviation and slope. The field application shows that this strategy can significantly improve the coiling temperature uniformity of hot rolled strip such as 1.55mm thick container board and 1.80mm thick tinplate substrate.