Grain Oriented Electrical Steel Sheet And Manufacturing Method Therefor

Abstract: This grain-oriented electrical steel sheet has a steel sheet on the surface of which a plurality of grooves extending in a direction intersecting the rolling direction and having a depth in the sheet thickness direction are formed. In a cross-section parallel to the rolling direction and parallel to the sheet thickness direction, where the groove width is defined as the distance from a groove entry portion to the opposite groove entry portion, the groove edge portion is defined as a region equivalent to the width of the groove from the entry portion of the groove on the steel sheet in the reverse direction from the center of the groove in the rolling direction, and the reference surface is defined as the surface of a region distanced further than the width of the groove from the entry portion of the groove in the reverse direction from the center of the groove in the rolling direction, there is a protrusion on the groove edge portion, said protrusion being a region with a width of 1 µm or more and a protrusion height of 1 µm or more from the reference surface, and the area ratio of Goss-oriented grains among the protrusion is 10% or more.

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