Non-oriented electrical steel plate with high magnetic induction and manufacturing method thereof

Abstract

The present invention discloses a non-oriented electrical steel plate with high magnetic induction, in addition to Fe and inevitable impurities, the steel plate further comprising the following chemical elements in percentage by mass: C≤0.003%, Si: 1.2-3.0%, Mn: 0.1-0.6%, P: 0.01-0.15%, Al: 0.1-0.4%, Ni: 0.05-1.0%, satisfying Si+Al: 1.30-3.20%; and does not comprise Sn and Sb. In addition, the present invention discloses a manufacturing method of the above non-oriented electrical steel plate with high magnetic induction, comprising the steps of: (1) smelting and casting; (2) heating, rough rolling, finish rolling and coiling: wherein a thickness of an intermediate slab after rough rolling is 20-45 mm, a thickness of a plate after finish rolling is 1.2-2.0 mm; after coiling, an aging treatment of 1-4 h is carried out in the range of 550-650° C. during the temperature reduction process; (3) pickling; (4) single cold rolling; (5) continuous annealing; (6) applying an insulating coating.

Dependencies are inferred from the claim text.