| 摘要 |
PROBLEM TO BE SOLVED: To provide a grain-oriented electromagnetic steel sheet having low core loss characteristic by performing a magnetic domain subdivision treatment by groove formation by a chemical means.SOLUTION: In this grain-oriented electromagnetic steel sheet having a linear groove whose angle to the rolling right angle direction is within 45°, the existence frequency of fine grains whose length in the rolling direction on the bottom part of the groove is ≤1 mm is ≤10% (including the case of no fine grains), and a forsterite coating as much as ≥0.6 g/min terms of the Mg basis Metsuke (weight per unit area) per one side of the steel sheet is provided in the groove, and further the angle (&bgr; angle) of the (100) axis of secondary recrystallized grains facing to the rolling direction of the steel sheet, which is formed with respect to a rolling surface is ≤3° in terms of a mean value. |
