| 摘要 |
PURPOSE:To improve the tensile strength without deteriorating the high frequency characteristics by regulating the composition of a silicon steel slab, hot rolling the slab and cold rolling and annealing the hot rolled steel sheet under specified conditions. CONSTITUTION:A silicon steel slab contg., by weight, 3.5-7% Si and <20wt% in total of one or more among 0.05-9% W, 0.05-9% Mo, 0.05-10% Ti, 0.1-11% Mn, 0.1-20% Ni, 0.5-20% Co and 0.5-13% Al is hot rolled. The hot rolled steel sheet is cold rolled to 0.01-0.35mm final thickness and annealed at 800-1,250 deg.C to regulate the average grain size to 0.01-5mm.
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