Abstract: The product accuracy of cold-rolled non-oriented silicon steel sheet needs to be guaranteed by hot rolling to provide excellent raw materials, and the hot rolling mill provides non-oriented silicon steel cold-rolled base material for the cold rolling mill, and the product cross-sectional shape is directly inherited to the final product size of cold rolling. The whole process of hot rolling ensures the precise control of the final convexity, wedge shape and transverse thickness difference of the product, involving the control of slab quality, heating furnace steel quality, rough rolling plate shape control, finishing roll design, centering rolling and channeling roll strategy, etc., to ensure the control accuracy of the final section shape of the hot rolled finished product, and to provide section guarantee for the cold rolling in the later process.

Key words: non-oriented silicon steel, section shape, degree of convexity, wedge