Posco

Other

Posco Co., Ltd

Oh Yeoul Kwon

Jae Kyoum Kim

Se Min Park

Gyoo Taek Lee

Seong Cheol Hong

Ki Young Min

Won Gul Lee

Jong-Tae Park

Myung Sik Chun

Seung Gon Lee

Chang Ho Moon

Hyun Chui Park

Sun Mi Shin

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

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.

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.

The present invention relates to a holding plate apparatus for golf clubs which is installed in a golf bag. The apparatus has three plates, an upper plate made of a rigid material, an intermediate plate made of an elastic material, and a bottom plate made of a rigid material. The three plates are assembled together, with the openings in each plate aligned with those of the other two plates. The holes in the elastic intermediate plate are made slightly smaller than the corresponding holes in the upper and lower plates such that when a golf club is inserted through the plates it makes contact only with the elastic material. The lower plate is of a form such that it mounts on the partitioning walls of a conventional golf bag. The intermediate plate also includes gripping openings such that the clubs may be either loosely placed in the large opening or firmly held in place by use of the small gripping opening.

Holding plate for golf clubs

Growing community of inventors

Pohang-si, South Korea

Oh Yeoul Kwon