Posco

Posco Co., Ltd

Won Gul Lee

Oh Yeoul Kwon

Jong-Tae Park

Jae Kyoum Kim

Se Min Park

Seung Gon Lee

Sun Mi Shin

Chang Ho Moon

Jong Tae Park

A grain-oriented electrical steel sheet according to an embodiment of the present disclosure includes: a forsterite layer formed on the surface of an electrical steel sheet; a groove which is formed on the forsterite layer in a direction perpendicular to a rolling direction; and a forsterite calcination layer which is formed in the direction of both ends of the electrical steel sheet on the basis of an upper end of the groove and has a width of 1.1 to 1.3 times the width of the groove.

Grain-oriented electrical steel sheet and method for manufacturing same

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 Eand a laser scanning speed Vof the radiated laser satisfy the following conditions,1.0 J/mm&#x2264;5.0 J/mm,0.0518 mm/&#x3bc;sec&#x2264;&#x2264;0.2 mm/&#x3bc;sec.

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Pohang-si, South Korea

Won Gul Lee