Title:
METHOD FOR REFINING MAGNETIC DOMAIN OF GRAIN-ORIENTED ELECTRICAL STEEL SHEET, AND DEVICE THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/115888
Kind Code:
A1
Abstract:
A method and a device for refining a magnetic domain of a grain-oriented electrical steel sheet are provided. According to the present invention, a method for refining a magnetic domain of a grain-oriented electrical steel sheet stably performs permanent magnetic domain refinement treatment when the electrical steel sheet is processed at a high speed of 2m/s or higher, and comprises: a snaking control step of allowing the steel sheet to move straight without being biased to the left or right along the center of a production line; a tension control step of providing tension to the steel sheet such that the steel sheet is maintained in a flatly spread state; a steel sheet support roll position adjusting step of controlling a vertical direction position of the designated steel sheet while supporting the steel sheet; and a laser emitting step of emitting laser beams so as to melt the steel sheet and form a groove on the surface of the steel sheet.
Inventors:
HONG SEONG-CHEOL (KR)
LIM CHOONG SOO (KR)
KWON OH-YEOUL (KR)
CHUN MYUNG-SIK (KR)
PARK HYUN-CHUL (KR)
LIM CHOONG SOO (KR)
KWON OH-YEOUL (KR)
CHUN MYUNG-SIK (KR)
PARK HYUN-CHUL (KR)
Application Number:
PCT/KR2015/014461
Publication Date:
July 06, 2017
Filing Date:
December 30, 2015
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C21D8/12; B23K26/352; B23K26/354; B23K26/364; C21D10/00
Foreign References:
| KR20150000927A | 2015-01-06 | |||
| KR20120073914A | 2012-07-05 | |||
| KR100779580B1 | 2007-11-28 | |||
| KR20100091493A | 2010-08-19 | |||
| KR20100058929A | 2010-06-04 |
Other References:
See also references of EP 3399058A4
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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