| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for producing a nonoriented silicon steel sheet lower in core loss after finish annealing. SOLUTION: This method is the one in which a slab of steel contg., by weight, <=0.005% C, <=4.0% Si, 0.05 to 1.5% Mn, <=0.2% P, <=0.005% (including zero) N, <=0.001% (including zero) S and 0.1 to 1.5% Al is subjected to hot rolling and is thereafter subjected to hot rolled sheet annealing, cold rolling and finish annealing to produce a nonoriented silicon steel sheet. In this case, the surface of the steel sheet as hot-rolled or the surface of the steel sheet subjected to descaling after the hot rolling is coated with a nitriding inhibitor, and, after that, hot rolled sheet annealing is executed.</p> |
