| abstract |
This invention is to provide an Fe-Cr-Si non-oriented electromagnetic steel sheet comprising 2.5 to 10 mass% of Si, 1.5 to 20 mass% of Cr, 0.006 mass% or less of C, 0.002 mass% or less of N, 0.005 mass% or less of S, 0.005 mass% or less of Ti and 0.005 mass% or less of Nb, optionally together with 0.1 to 2 mass% of Al and either or both of Sb and Sn provided that the amount of each of Sb and Sn is in the range of 0.005 to 1 mass%, with the balance composed of Fe and unavoidable impurities. The electric resistance of steel is 60 μ ohm.cm or higher, and the quantity of Cr-containing nitride lying in the interior of steel sheet is 2500 or less per mm<SP>2</SP>. Thus, there is provided a non-oriented electromagnetic steel sheet that excels in magnetic properties in high-frequency region, especially region of 1 kHz or higher frequency, through advantageous resolution of the problem that high electrical resistance realized by high Si and high Cr contents is not fully utilized in high-frequency region of 10 kHz or below. |