| 摘要 |
PROBLEM TO BE SOLVED: To produce an inexensive silicon steel sheet having a characteristic of being small in core loss, and to provide its production method. SOLUTION: This nonoriented silicon steel sheet has a composition containing, by weight, <=0.01% C, 0.05 to 3.5% Si, <=1% Mn, <=1% Sol.Al, <=0.02% Cu, <=0.02% S, <=0.3% P, 0.01 to 0.2% Zr and 0.0005 to 0.025% Ca, and the balance substantially Fe, in which Ca inclusions dispersed into the steel contain at least either O or S, Zr inclusions contain at least N among N and C, and the total weight of each inclusion of CaO, CaS and Zr (N, C) is >=50% to the weight of all inclusions. |
