| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonoriented magnetic steel sheet enabling a rotor core material with high strength and high magnetic flux density and a stator core material with low iron loss and high magnetic flux density to be obtained from same raw material steel sheet, and a motor core obtained by using the nonoriented magnetic steel sheet.SOLUTION: There is provided the nonoriented magnetic steel sheet having a component composition containing C:0.005 mass% or less, Si:1.5 to 6.0 mass%, Mn:0.05 to 2.0 mass%, P:0.03 to 0.15 mass%, S:0.005 mass% or less, N:0.005 mass% or less, Al:0.005 mass% or less, Ti:0.001 to 0.02 mass% and the balance Fe with inevitable impurities and a yield stress after final annealing of 400 MPa or more. There is also provided a rotor core of a rotary machine obtained by blanking and then laminating the nonoriented magnetic steel sheet.SELECTED DRAWING: Figure 2 |
