Grain-oriented electrical steel sheet and manufacturing method therefor

Abstract

This grain-oriented electrical steel sheet includes a steel sheet having a surface in which a plurality of grooves extending in a direction intersecting a rolling direction and having a depth in a sheet thickness direction are formed. In a cross section parallel to the rolling direction and parallel to the sheet thickness direction, when a distance from an inlet portion of a groove to an opposite inlet portion of the groove is defined as a width of the groove, a region equivalent to the width of the groove from the inlet portion of the groove of the steel sheet in a direction opposite to a center of the groove in the rolling direction is defined as a groove edge portion, and a surface in a region separated from the inlet portion of the groove in the direction opposite to the center of the groove in the rolling direction is defined as a reference plane, the groove edge portion has a projection that is a region having a width of 1 μm or more and a projection height of 1 μm or more from the reference plane, and an area fraction of Goss oriented grains of the projection is 10% or more.

Dependencies are inferred from the claim text.