| 摘要 |
PROBLEM TO BE SOLVED: To produce a nonoriented silicon steel sheet excellent in core loss characteristics even by finish annealing at a low temp. in a short time and magnetic annealing at a low temp. in a short time. SOLUTION: This nonoriented silicon steel sheet has a compsn. consisting of, by weight, >1 to 3.5% Si, 0.1 to 1% Al, 0.1 to 0.8% Mn, <=0.05% Cu and <=0.01% S, and in which the size and the number of inclusions contained therein are regulated to: those having 0.1 to 0.5μm diameter are 500 to 5000 pieces/mm<2> and those having >0.5μm diameter are <=500 pieces/mm<2> . Furthermore, the content of C is regulated to <=0.005%, P to <=0.2% and N to <=0.005%. |
