Abstract: The rolling strategy of electrical steel was optimized in a factory, and the rough rolling pass was changed from “1+5” to “1+3”. Subsequently, the following problems were occurred in the production process: when the steel grade changed, the roasting roller steel before the electrical steel appeared the narrow width phenomenon, and then the electrical steel appeared the ultrawide phenomenon. This paper introduced the principle of width setting model and width adaptive model, and expounded the causes and solutions of this problem. In the end, the problem was solved effectively, the product quality was greatly improved and the width blocking rate was also reduced.

Key words: hot rolling strip steel, width adaptive model, adaptive coefficient