Abstract: In viewing of the local high point problem occurred in the production process of hot-rolled non-oriented silicon steel, a thorough analysis of the production process was conducted to accurately identify the key factors affecting the formation of local high points, including rolling process parameters, edge temperature drop of strip steel, and roll wear. Based on this, a series of effective improvement measures have been proposed, including optimizing the rolling process, controlling the edge temperature drop, adding a rolling mill wear model, and adopting asynchronous sine roll shifting strategy for downstream stands. The practical results strongly indicated that these measures significantly reduced the incidence of local high points, greatly improved product quality, and provided solid theoretical basis and valuable practical guidance for quality control in hot-rolled non-oriented silicon steel production.

Key words: hot-rolled non-oriented silicon steel, local high point, rolling process, edge temperature drop, roll wear, quality control