METHOD FOR MANUFACTURING HIGH MAGNETIC FLUX DENSITY GRAIN ORIENTED ELECTRICAL STEEL SHEET BASED ON LOW TEMPERATURE SLAB HEATING METHOD

摘要

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.