公开(公告)号：US11060163B2

公开(公告)日：2021-07-13

申请号：US16072143

申请日：2016-12-23

Applicant: POSCO

Inventor： Seong Cheol Hong ,  Jae Kyoum Kim ,  Ki Young Min ,  Se Min Park ,  Myung Sik Chun ,  Gyoo Taek Lee ,  Oh Yeoul Kwon ,  Hyun Chui Park

IPC: C21D10/00 ,  B23K26/00 ,  B23K26/08 ,  C21D8/12 ,  B23K26/354 ,  B23K26/12 ,  B23K26/142 ,  B23K26/359 ,  B23K26/364 ,  B23K37/047 ,  B23K26/082 ,  B23K26/04 ,  B23K26/03 ,  B23K26/40 ,  B23K26/70 ,  B23K26/16 ,  B23K101/16 ,  B23K103/04

Abstract: 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.