GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME

摘要

A grain-oriented electrical steel sheet and a method for manufacturing the same are disclosed. The method for manufacturing a grain-orientated electrical steel sheet according to an embodiment of the present invention comprises the steps of: providing an electrical steel sheet before or after forming a primary recrystallization; and forming a groove on the electrical steel sheet by irradiating a laser beam to the electrical steel sheet and spraying gas onto the same, wherein the energy density (Ed) and the scanning speed (Vs) of the irradiated laser beam satisfy the following conditions of 1.0 J/mm2≤ Ed ≤ 5.0J/mm2 and 0.0518mm/μsec≤ Vs ≤ 0.2mm/μsec.