Posco

Posco Co., Ltd

Won-Gul Lee

Se-Min Park

Oh-Yeoul Kwon

Jong-Tae Park

Seong-Cheol Hong

Hyun-Chul Park

Ki-Young Min

Choong Soo Lim

Chan-Hee Han

Woo-Sin Kim

Chang-Ho Kim

Oho-Cheal Kwon

Gyoo-Taek Lee

Jung-Moon Kang

Sun Mi Shin

Chang Ho Moon

Jae Soo Kim

A grain-orientation electrical steel sheet according to an exemplary embodiment of the present invention includes a linear groove formed in a direction intersecting with the rolling direction, the groove includes the gradient section and the uniform section on a cross section including the transverse direction of the groove and the rolling surface normal direction of the steel sheet, and a length of the gradient section (GS) and the length of the uniform section (US) satisfy Equation 1 below.0.1≤[GSL]/[USL]≤0.5  [Equation 1]

Grain-oriented electrical steel sheet and magnetic domain refinement method thereof

A grain-oriented electrical steel sheet incudes a groove formed on a surface and a solidified alloy layer formed under the groove, wherein the solidified alloy layer includes particles of a certain average diameter.

Grain-oriented electrical steel sheet and magnetic domain refinement method therefor

A grain-oriented electrical steel sheet according to an embodiment of the present invention includes: a groove on a line formed on one surface of an electrical steel sheet in a direction crossing a rolling direction; and a thermal shock portion on a line formed on one surface of the electrical steel sheet in the direction crossing the rolling direction, wherein a distance between the groove and the thermal shock portion is 1 mm or less.

Grain-oriented electrical steel sheet and magnetic domain refining method therefor

A grain-oriented electrical steel sheet includes a groove formed on a surface and a solidified alloy layer formed under the groove, wherein the solidified alloy layer includes particles of a certain average diameter.

A grain-oriented electrical steel plate of an exemplary embodiment of the present invention has a groove formed on a surface, wherein a curvature radius RBb at a position where a depth of the groove is maximum is 0.2 &#x3bc;m to 100 &#x3bc;m, and a curvature radius RSb on the groove surface from the position where the depth of the groove is maximum to a quarter-way position of the depth D of the groove is 4 &#x3bc;m to 130 &#x3bc;m.

Grain-oriented electrical steel plate and manufacturing method thereof

Provided is an electrical steel sheet comprising: a groove formed in a surface of a steel sheet, wherein the groove includes a bottom surface, a first side surface extending from the bottom surface, and a second side surface extending from the bottom surface in opposite to the first side surface, wherein the groove has a depth from the surface to the bottom surface, a width in a rolling direction of the steel sheet, and a length in a width direction of the steel sheet, and wherein the groove is formed through laser-irradiation and removal of melt produced by the laser-irradiation; an opening defined by the bottom surface, the first side surface and the second side surface; and a first solidification portion formed on the first side surface of the groove. The first solidification portion is formed by a solidification of part of the melt produced from the laser-irradiation.

Electrical steel sheet and method for manufacturing the same

Growing community of inventors

Pohang-si, South Korea

Won-Gul Lee