Non Oriented Electromagnetic Steel Sheet And Method For Manufacturing Same

Abstract: Provided is a non-oriented electromagnetic steel sheet which, despite having high strength, has excellent magnetic properties and superior punching workability. The non-oriented electromagnetic steel sheet of the present invention has a TS higher than 580 MPa and satisfies formula (1) when P120/Fe700, which is the ratio of a peak-to-peak value P120 of P near electron energy of 120eV to a peak-to-peak value Fe700 of Fe near electron energy of 700 eV in an Auger differential spectrum obtained in a grain boundary region of a fracture surface, is defined as [P]GB, and when P120/Fe700, which is the ratio of P120 to Fe700 of an Auger differential spectrum obtained in the intragrain region of the fracture surface, is defined as [P]IG. A difference ?S between TS and YP is equal to or less than 110 MPa, and an average crystal grain diameter D (µm) satisfies formula (2). Formula (1): [P]GB/[P]IG>2.0. Formula (2): D?100-15×[P]GB/[P]IG+1500/TS.

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