Grain Oriented Electrical Steel Sheet

Abstract: This grain-oriented electrical steel sheet has a steel sheet in which a plurality of grooves that extend in a direction intersecting the rolling direction and that have a depth in the sheet thickness direction are formed on the surface thereof. Taking a groove edge part to be the range of 40 µm from a groove entrance in a direction perpendicular to the sheet thickness direction and away from the widthwise center of the groove in a cross-section of the steel sheet parallel to the rolling direction and parallel to the sheet thickness direction: in the groove edge parts in a plurality of said cross-sections, the proportion of the number of protrusions having a height of 2.0 µm to smaller than 6.0 µm is from 10% to lower than 40%; and when viewed from above, brush marks having a width of 4-25 µm and a depth 4 µm or below are present in from 10% to less than 80% of the groove edges in terms of area percentage.

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