Non-oriented electrical steel sheet having high magnetic flux density and motor
A non-oriented electrical steel sheet having a chemical composition comprising C: not more than 0.010 mass %, Si: 1.0-7.0 mass %, Mn: 0.001-3.0 mass %, sol. Al: 0.0001-3.5 mass %, P: 0.01-0.2 mass %, S: not more than 0.010 mass %, N: not more than 0.010 mass % and the remainder being Fe and inevitable impurities, wherein a ratio (P 120 /Fe 700 ) of a peak-peak height P 120 of P near to an electronic energy of 120 eV to a peak-peak height Fe 700 of Fe near to an electronic energy of 700 eV in an Auger differential spectrum obtained by analyzing a broken surface of a grain boundary through Auger electron spectroscopy is not less than 0.1 and a sheet thickness is 0.10-0.50 mm, and a motor using such a non-oriented electrical steel sheet as an iron core.
1. A non-oriented electrical steel sheet having a chemical composition comprising:
C: not more than 0.010 mass %,
Si: 1.0-7.0 mass %,
Mn: 0.001-3.0 mass %,
sol. Al: 0.0001-3.5 mass %,
P: 0.01-0.2 mass %,
S: not more than 0.010 mass %,
N: not more than 0.010 mass %, and
the remainder being Fe and inevitable impurities,
wherein:
a ratio (P 120 /Fe 700 ) of a peak-peak height P 120 of P near to an electronic energy of 120 eV to a peak-peak height Fe 700 of Fe near to an electronic energy of 700 eV in an Auger differential spectrum obtained by analyzing a broken surface of a grain boundary through Auger electron spectroscopy is not less than 0.1, and
a sheet thickness is 0.10-0.50 mm.
2. The non-oriented electrical steel sheet according to claim 1 , wherein sol. Al is 0.0001-0.01 mass % in the chemical composition.
3. The non-oriented electrical steel sheet according to claim 1 , wherein the chemical composition further includes at least one group of chemical components among Groups A-C below:
Group A: one or more selected from Sn: 0.01-0.1 mass %, and Sb: 0.01-0.1 mass %,
Group B: one or more selected from Ca: 0.001-0.05 mass %, REM: 0.001-0.05 mass % and Mg: 0.001-0.05 mass %, and
Group C: one or more selected from Ni: 0.01-0.5 mass %, Cu: 0.01-0.5 mass % and Cr: 0.01-0.5 mass %.
4. The non-oriented electrical steel sheet according to claim 2 , wherein the chemical composition further includes at least one group of chemical components among Groups A-C below:
Group A: one or more selected from Sn: 0.01-0.1 mass % and Sb: 0.01-0.1 mass %
Group B: one or more selected from Ca: 0.001-0.05 mass %, REM: 0.001-0.05 mass % and Mg: 0.001-0.05 mass %, and
Group C: one or more selected from Ni: 0.01-0.5 mass %, Cu: 0.01-0.5 mass % and Cr: 0.01-0.5 mass %.
5. A motor comprising a non-oriented electrical steel sheet as claimed in claim 1 as an iron core.
6. A motor comprising a non-oriented electrical steel sheet as claimed in claim 2 as an iron core.
7. A motor comprising a non-oriented electrical steel sheet as claimed in claim 3 as an iron core.
8. A motor comprising a non-oriented electrical steel sheet as claimed in claim 4 as an iron core.