A method for manufacturing a high magnetic flux density grain oriented electrical steel sheet is disclosed. A silicon steel slab is heated and hot-rolled, and the steel sheet is annealed and cold-rolled and decarburized. An annealing separator is spread on the steel sheet, and a final high temperature annealing is carried out. The silicon steel contains in weight % 0.02-0.045% of C, 2.90-3.30% of Si, 0.05-0.30% of Mn, 0.005-0.019% of Al, 0.003-0.008% of N, 0.006% or less of S (the above being main ingredients), 0.001-0.012% of B, and a balance of Fe and unavoidable impurities; or the above main ingredients plus 0.30-0.70% of Cu, 0.03-0.07% of Ni, 0.03-0.07% of Cr, and a balance of Fe and unavoidable impurities; or the above main ingredients plus 0.001-0.012% of B, 0.30-0.70% of Cu, 0.03-0.07% of Ni, 0.03-0.07% of Cr, and a balance of Fe and unavoidable impurities.

Um método para manufaturar uma folha de aço elétrica orientada da densidade do fluxo grão magnética elevada é divulgado. Uma laje de aço do silicone é aquecida e hot-rolled, e a folha de aço é recozida e cold-rolled e decarburized. Um separador do recozimento é espalhado na folha de aço, e um recozimento de alta temperatura final é realizado. O aço do silicone contem no peso % 0.02-0.045% de C, 2.90-3.30% do silicone, 0.05-0.30% do manganês, 0.005-0.019% do al, 0.003-0.008% de N, 0.006% ou menos de S (ser acima ingredientes principais), 0.001-0.012% de B, e um contrapeso do Fe e de impurezas unavoidable; ou os ingredientes principais acima mais 0.30-0.70% do cu, 0.03-0.07% do Ni, 0.03-0.07% do cr, e um contrapeso do Fe e de impurezas unavoidable; ou os ingredientes principais acima mais 0.001-0.012% de B, 0.30-0.70% do cu, 0.03-0.07% do Ni, 0.03-0.07% do cr, e um contrapeso do Fe e de impurezas unavoidable.

 
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