GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME

摘要

Disclosed are a grain-oriented electrical steel sheet and a method of manufacturing the same. The method for manufacturing a grain-orientated electrical steel sheet according to an exemplary embodiment of the present invention includes: providing an electrical steel sheet before forming primary recrystallization or after forming the primary recrystallization; and forming a groove in a surface of the electrical steel sheet by radiating laser and simultaneously spraying gas onto the electrical steel sheet, in which energy density E d and a laser scanning speed V s of the radiated laser satisfy the following conditions, 1.0 J / mm 2 ‰¤ E d ‰¤ 5.0 J / mm 2 , 0.0518 mm / ¼sec ‰¤ V s ‰¤ 0.2 mm / ¼sec