Non Oriented Electrical Steel Sheet, Method Of Production Of Same, And Rotating Electrical Machine Containing Same

Abstract: (Problem) To provide a novel non-oriented electromagnetic steel sheet that has excellent magnetic aging resistance and does not tend to develop stretcher strain, a method for producing the same, and a rotary electric machine containing the same. (Solution) A non-oriented electromagnetic steel sheet comprising a chemical composition of, in mass%, C: 0.0100% or less, Si: 2.6-4.5% inclusive, Mn: 0.10-3.00% inclusive, P: 0.15% or less, S: 0.0040% or less, N: 0.0040% or less, Al: 0.10-2.00% inclusive, one or more selected from Sn and Sb: 0-0.200%, Cr: 0.001-5.000%, predetermined amounts of optionally added elements (Ni, Cu, Ca, Mg, REM, Ti, B, O), and remainder: Fe and impurities, the non-oriented electromagnetic steel sheet being characterized in that the difference: A.I. in the lower yield point before and after aging when aged for one hour at 100°C after application of 8% strain is less than 40 MPa; a method for producing the same; and a rotary electric machine containing the same.

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