| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonoriented silicon steel sheet having high magnetic flux density and low iron loss. SOLUTION: The steel sheet has a composition which consists of, by weight, 0.1-3.5% Si, 0.1-1.5% Mn, 0.0010-0.0025% C, <=0.002% N, <=0.002% S, <=0.003%,Pi, <=0.003% Nb, <=0.005% V, <=0.003% Zr, <=0.003% Ca, <=0.003% As, <=0.05% Cr, <=0.01% Sn, <=0.05% Cu, <=0.02% O, and the balance Fe with inevitable impurities and in which the value of Q, determined by equation Q=log ([Ti%]+[Nb%]+[V%]+[Zr%]+[Ca%])×[C%]), is regulated to -4.70. In the equation, [Ti%], [Nb%], [V%], [Zr%], [Ca%], and [C%] represent respective weight concentrations of Ti, Nb, V, Zr, Ca, and C in a product, respectively. |
