| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a steel sheet for in-vehicle motor core by which core loss can be effectively improved without causing increases in motor core manufacturing costs resulting from thinning of steel sheet, addition of Si, annealing treatment after blanking and the like. <P>SOLUTION: The steel sheet has a component composition consisting of, by mass, ≤0.005% C, <0.05% Si, 0.1 to 0.5% Mn, 0.02 to 0.20% Cr, ≤0.1% P, ≤0.01% S, ≤0.004% Sol. Al, ≤0.005% N, ≤0.02% O and the balance Fe with inevitable impurities. Further, an average crystal grain size is ≥40 μm and core loss W<SB>15/50</SB>at 0.8 mm sheet thickness is ≤13 W/kg. <P>COPYRIGHT: (C)2009,JPO&INPIT |
