取向硅钢冷轧断带问题研究

对取向硅钢冷轧过程出现的断带缺陷进行了跟踪，明确了从起皮到形成孔洞，再到断带的演变过程，采用扫描电镜对翘皮缺陷进行研究，结果表明：翘皮缺陷中主要元素是Fe、Si、Al，与基体一致，另外还有微量的Ca、Mg、K、Na等元素。冷轧起皮、断带主要是由于热轧边裂缺陷遗传而成。热轧过程部分边部掉肉飞溅至热轧板表面被压入，在冷轧过程由于伸长率与基体不一致而起皮剥落。通过降低铸坯加热温度、缩短高温段在炉时间、优化轧制模型，有效抑制了热轧板边裂的产生，从而解决了冷轧断带问题。

Research on cold rolling strip breaking of grain-oriented silicon steel

The strip breaking defects of grain-oriented silicon steel during the cold rolling were tracked, and the evolution process from skinning to hole formation and then to strip breaking was clarified. The scar defect was studied by peeling electron microscope. The results showed that the main elements in the scar defect were Fe, Si and Al, which were consistent with the matrix, and there were also trace elements such as Ca, Mg, K and Na. Cold rolling peeling and breaking was mainly due to hot rolling edge cracking defects inherited. The reasons why peeling and flaking were that part of the edge during the hot rolling occurred flesh out and splashed and was pressed into the surface of the hot rolled plate, and inconsistency of elongation and matrix during cold rolling. By reducing the slab heating temperature, shortening the furnace time of high temperature section and optimizing the rolling model, the edge crack of hot rolled strip was effectively restrained, and the problem of cold rolling strip breaking was solved.