The invention provides a hot rolling method for a non-oriented
electrical steel thin strip. The
electrical steel thin strip comprises, by weight, C<=0.003%, 3.5%-7.0% of Si, Al<=3.0%, 0.10%-1.50% of Mn, P<=0.03%, S<=0. 01%, N<=0.05%, and the balance Fe and unavoidable impurities. Before finish rolling, a plurality of slabs are stacked together to be rolled, the slabs are the same in thickness and component, and the thickness of each slab is 30-40 mm. The rolling starting temperature is controlled to be 950 DEG C or below. In the rolling process, cooling water in a rack is stopped. The final rolling temperature is controlled to be 800 DEG C or above. The coiling temperature is controlled to be 700 DEG C or below. Each roll of steel plate is rolled to be 0.2-0.7 mm.
Slow cooling is conducted after coiling. After
slow cooling, edge
cutting and roll division are conducted. According to the hot rolling method, hot stacking
continuous rolling is adopted, and the final rolling temperature is raised, so that a
hot rolled plate is fully recrystallized, and the finished product iron loss is further reduced. The electromagnetic property is excellent, the production efficiency is improved, the steel plate is even in thickness, and the hot rolling method is suitable for high-speed
stamping and automatic lamination.