| 摘要 |
PROBLEM TO BE SOLVED: To obtain a grain-oriented magnetic steel sheet with which in the case of manufacturing a stacked transformer, especially, when the transformer is manufactured by using the grain-oriented magnetic steel sheet having magnetic flux density Bof ≥1.93T, even there is a part where the magnetic flux is shifted from a rolling direction and curved, such as a corner part, an iron loss deterioration can effectively be suppressed.SOLUTION: The surface of the steel sheet is irradiated with an electron beam prior to primary recrystallization annealing, and the surface of the steel sheet is made a flat surface having arithmetic average roughness RA of ≤0.15 μm. |
