Manufacturing method of common grain-oriented silicon steel with high magnetic induction

摘要: A manufacturing method of oriented silicon steel with magnetic induction B8 not less than 1.88T, comprising the following steps: 1) smelting and continuously casting to obtain a slab, wherein content N is controlled at 0.002-0.014wt% in stage; 2) hot-rolling; 3) cold-rolling; 4) decarbonizing annealing; 5) nitriding treatment, infiltrated nitrogen [N]D satisfy formula: 328-0.14a-0.85b-2.33c≤[N]D≤362-0.16a-0.94b-2.57c, Als step, unit ppm; b element, c primary grains size, µm; 6) coating surface magnesium oxide 7) applying an insulating coating.