| 摘要 |
PROBLEM TO BE SOLVED: To provide a grain-oriented silicon steel sheet obtaining excellent noise characteristics and core loss characteristics when the steel sheets are assembled to an actual transformer.SOLUTION: The average &bgr; angle of the secondary recrystallized particle is ≤2°. The average &bgr; angle variation range within the secondary recrystallized particle is ≥1° and ≤4°. Surface tension in the rolling direction is ≥10 MPa. Magnetostriction λp-p at the magnetic flux density of 1.7T and the frequency of 50 Hz is ≤1.0×10. Further, the plate thickness t and the core loss Wsatisfy following expression (1): W≤2.1×t +0.3, where t denotes the plate thickness (mm). |
