GRAIN-ORIENTED ELECTRIC STEEL SHEET AND METHOD FOR MANUFACTURING SAME

摘要

PROBLEM TO BE SOLVED: To provide a grain-oriented electric steel sheet in which both core loss and noise are reduced.SOLUTION: In an electric steel sheet, regions with locally high lattice defect density are formed on a surface of or within the steel sheet and magnetic domains are refined. In the electric steel sheet, the hardness of the high lattice defect density regions measured by a micro Vickers hardness meter is equal to or less than the hardness of other regions.