Posco

Posco Co., Ltd

Se Min Park

Jae Kyoum Kim

Oh Yeoul Kwon

Jong-Tae Park

Gyoo Taek Lee

Seong Cheol Hong

Ki Young Min

Seung Gon Lee

Hyun-Chul Park

Oh-Yeoul Kwon

Myung Sik Chun

Jung Hun Park

Won Gul Lee

Jae-Kyoum Kim

Sung-Yeun Won

Seong-Kyu See

Hyun Chui Park

Hyun Chul Park

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

Provided is an oriented electrical steel sheet including a groove existing on the surface of the electrical steel sheet and a forsterite layer formed on a part or all of the surface of the electrical steel sheet, in which forsterite which is extended from the forsterite layer and penetrates to a base steel sheet in an anchor form is present on the surface of the side of the groove.

Grain-oriented electrical steel plate and production method therefor

By optimizing equipment and processing, magnetic domain miniaturization efficiency can be increased, workability can be improved, and processing ability can be increased through same. Provided is a method for miniaturizing the magnetic domains of a directional electric steel plate, the method comprising: a steel plate supporting roll position adjusting step of controlling the vertical direction position of a steel plate while supporting the steel plate progressing along a production line; and a laser emitting step of melting the steel plate by emitting a laser beam to form grooves on the surface of the steel plate and a removing steel plate surface step of to remove remaining spatters dropped on the surface of the steel plate after the laser emitting.

Method for refining magnetic domains of grain-oriented electrical steel plates, and apparatus therefor

Provided is a method for refining magnetic domains of grain-oriented electrical steel plates including: a steel plate supporting roll position adjusting step of controlling a vertical direction position of the steel plate while supporting the steel plate; a laser radiating step of melting the steel plate by radiating a laser beam to form grooves on the surface of the steel plate; and a setting and maintaining step of setting and maintaining an internal operation environment of a laser room in which the laser radiation is performed, so as to increase magnetic domain refinement efficiency and improve workability by optimizing equipment and processes, thereby increasing the processing capacity.

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Pohang-si, South Korea

Se Min Park