| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a monodirectional magnetic steel sheet of low core loss, which can sustain stress relief annealing without deterioration in magnetic flux density and decline in the space factor. <P>SOLUTION: A molten/resolidified layer is cyclically formed in the rolling direction at ≥2 mm and ≤5 mm pitch on a surface or on both surfaces in pairs of a monodirectional magnetic steel sheet in the direction perpendicular to the rolling direction, i.e., in the sheet width direction. An aspect ratio of the molten/resolidified layer on one surface=depth/width is set to 0.20 or more, and the depth is set to 15 μm or more. The molten/resolidified layer is formed by using a laser. <P>COPYRIGHT: (C)2004,JPO |
