DR9镀锡板板形控制技术研究与应用

针对DR9镀锡板在二次冷轧和镀锡拉矫过程中存在的边浪及翘曲等板形问题，分别在二次冷轧、卷取、拉矫等3个镀锡板板形控制的关键工艺环节开展二次冷轧机的板形控制能力与辊形配置及辊端压靠现象、卷取过程带钢板形缺陷变化、镀锡拉矫机对带钢板形翘曲缺陷的调控性能等方面的分析研究。确定了该边浪及翘曲板形缺陷产生的原因与规律，提出了全流程DR9镀锡板板形控制策略与系列板形控制技术，并在首钢京唐镀锡板生产线投入生产应用，使二次冷轧后DR9镀锡基板的板形缺陷由原来20 IU的边浪改善为5 IU的中浪，边浪板形缺陷完全消除，镀锡拉矫后DR9镀锡板的板形缺陷也明显改善，带钢翘曲高度由35降至10 mm以内。

Research and application of flatness control on DR9 tinplate

According to the edge wave and warping problems of DR9 tinplate in double cold rolling and tension leveling process, the shape control ability of the double cold rolling mill, the roll contour configuration, the kiss between work roll ends, the variation of the shape defects of strip steel in coiling process and the effects of the tin plating tension leveller on the strip shape warping defects of strip steel were analyzed. At the same time, the causes and rules of the edge wave and warping defects were determined. On this base, the flatness control strategy and technologies of DR9 tinplate were proposed and applied in the tinplate production line of Shougang Jingtang. The 20 IU center wave of DR9 tinplate after double cold rolling was improved to 5 IU edge wave, which indicated that the edge wave defects were entirely eliminated. And the shape defects were dramatically improved, the warping height of tinplate after tension leveling was reduced from 35 to 10 mm.