Grain Oriented Electrical Steel Sheet And Method For Manufacturing Same

Abstract: This grain-oriented electrical steel sheet is characterized in that: the chemical composition of a base material steel sheet comprises, in mass%, Si: 2.5 to 4.5%, Mn: 0.01 to 1.00%, N: = 0.01%, C: = 0.01%, sol.Al: = 0.01%, S: = 0.01%, Se: = 0.01%, P: 0.00 to 0.05%, Sb: 0.00 to 0.50%, Sn: 0.00 to 0.30%, Cr: 0.00 to 0.50%, Cu: 0.00 to 0.50%, Ni: 0.00 to 0.50%, and Bi: 0.0000 to 0.0100%, the remainder being Fe and impurities; a magnetic flux density B8 in a rolling direction of the grain-oriented electrical steel sheet is more than or equal to 1.93 T; in a direction intersecting the rolling direction of the grain-oriented electrical steel sheet, deformed regions that extend across the entire width of the grain-oriented electrical steel sheet are periodically formed at an interval L of 3-30 mm; the deformed regions have a width W of 0.2-30.6 mm; and a protruding portion having a maximum height Dprotrusion of 1-5 µm is formed on one surface of the deformed regions, and a recess portion having a maximum depth Drecess of 1-4 µm is formed on the opposite surface.

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