| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low core loss grain oriented silicon steel sheet in which, while maintaining the remarkable reduction effect of eddy current loss, the reduction of magnetic flux density such as B8 and the increase of hysteresis loss are further suppressed, and whose magnetic properties such as core loss can be improved. <P>SOLUTION: Regarding the low core loss grain oriented silicon steel sheet, in a steel sheet comprising a metal or a metallic compound whose magnetic anisotropy constant is higher than that of Fe is incorporated into one or a plurality of grooves in either or both of the surface and back layers in the steel sheet, the metal or metallic compound has only one easily-magnetized axis in the vertical direction of the groove boundary, and also, the groove(s) is formed in such a manner that the ratio of the easily-magnetized axes in the vertical direction of the steel sheet surface to all the easily-magnetized axes is controlled to 25 to 80%. <P>COPYRIGHT: (C)2008,JPO&INPIT |
