| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a grain-oriented electromagnetic steel plate to which magnetic domain refinement by laser irradiation or electron beam irradiation is performed, and which achieves excellent low noise and low iron loss characteristics when assembled on an actual transformer. <P>SOLUTION: Total tensions applied to the steel plate by a forsterite film and tension coating are equal to or larger than 10.0 MPa in a rolling direction and equal to or larger than 5.0 MPa in a direction perpendicular to the rolling direction, and the total tensions satisfy the relationship in the following formula: 1.0≤A/B≤5.0, where A is the total tension by the forsterite film and the tension coating in the rolling direction, and B is the total tension by the forsterite film and the tension coating in the direction perpendicular to the rolling direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
