Method for producing high-magnetic-induction oriented silicon strips through three-stage normalizing

A method for producing high-magnetic-induction oriented silicon strips through three-stage normalizing comprises the following steps: heating a casting blank to 1100-1250DEG C; carrying out hot rolling of the casting blank to the thickness of the casting blank 5-14.3 times higher than the thickness of a finished silicon strip; reeling; carrying out three-stage normalizing annealing; once carrying out cold rolling in a 130-250DEG C ageing rolling manner to the thickness of the finished silicon strip; carrying out decarburizing annealing in a wet N2+H2 atmosphere; carrying out nitriding annealing; and carrying out high temperature annealing. The method which adopts a three-stage normalizing technology improves the phase strength of Gauss crystal grains in hot rolled plates, so the magnetic induction values of the oriented silicon strips are improved, and the quality level of the oriented silicon strips is improved. The third-stage temperature is low, so the temperature uniformity and the cooling stress of steel plates before quenching the hot rolled plates are well controlled, the cold rolling brittleness after the normalizing annealing of the hot rolled plates is improved, the cold rolling can be completed without water-bath heating, and the production efficiency is increased.