Non-oriented electrical steel sheet, production method for non-oriented electrical steel sheet, electric motor and production method for electric motor

An electric motor comprising a stator core,

• wherein the stator core has a chemical composition including, in mass %,
• C:
• 0.0010 to 0.0040%,
• Si:
• 3.2 to 4.5%,
• sol. Al:
• 0.2 to 2.0%,
• Mn:
• 0.1 to 3.5%,
• P:
• more than 0% and 0.10% or less,
• S:
• 0 to 0.0030%,
• N:
• 0 to 0.0030%,
• Ti:
• 0 to 0.0030%,
• Mo:
• 0.0010 to 0.1000%,
• Cr:
• 0 to 0.10%,
• B:
• 0 to 0.0010%,
• Ni:
• 0 to 0.50%,
• Cu:
• 0 to 0.50%,
• Sn:
• 0 to 0.2000%,
• Sb:
• 0 to 0.2000%,
• Ca:
• 0 to 0.0050%,
• Zn:
• 0 to 0.0050%,
• La:
• 0 to 0.0050%,
• Ce:
• 0 to 0.0050%,
• O:
• 0 to 0.1000%,
• V:
• 0 to 0.1000%,
• W:
• 0 to 0.1000%,
• Zr:
• 0 to 0.1000%,
• Nb:
• 0 to 0.1000%,
• Mg:
• 0 to 0.1000%,
• Bi:
• 0 to 0.1000%,
• Nd:
• 0 to 0.1000%,
• Y:
• 0 to 0.1000%,
• As:
• 0 to 0.1000%,
• Ga:
• 0 to 0.1000%,
• Ge:
• 0 to 0.1000%,
• Co:
• 0 to 0.1000%,
• Se:
• 0 to 0.1000%,
• Pb;
• 0 to 0.1000%, and
• the remainder:
• Fe and impurities,
• wherein the stator core has a tensile strength of 500 MPa or more, and
• a ratio (P120SB/Fe700SB)SB between a peak-to-peak height Fe700SB of Fe at 700 eV and a peak-to-peak height P120SB of P at 120 eV when crystal grain boundaries of the stator core are measured through Auger electron spectroscopy is not more than 4 times a ratio (P120Si/Fe700Si)Si between a peak-to-peak height Fe700Si of Fe at 700 eV and a peak-to-peak height P120Si of P at 120 eV when the inside of crystals is measured through Auger electron spectroscopy.