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Title:
METHOD FOR REFINING MAGNETIC DOMAIN OF GRAIN-ORIENTED ELECTRICAL STEEL PLATE AND DEVICE THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/117510
Kind Code:
A2
Abstract:
Provided is a method for refining a magnetic domain of a grain-oriented electrical steel plate, the method comprising: a steel plate support roll position adjustment step of controlling a vertical position of a steel plate, which is being transferred along a production line, while supporting the steel plate, to precisely check a processing state of a magnetic domain refinement groove formed on a surface of the steel plate in a working process to allow detection of whether the groove has a defect; a laser irradiation step of irradiating a laser beam to a surface of a steel plate to melt the steel plate so as to form a groove on the surface of the plate; and a detection step of detecting whether a groove formed on a surface of a steel plate in a steel plate transfer process has a defect.

Inventors:
LEE, Gyoo-Taek (6261, Donghaean-ro, Nam-gu,,Pohang-si, Gyeongsangbuk-do, 37859, KR)
LEE, Ju Seung (6261, Donghaean-ro, Nam-gu,,Pohang-si, Gyeongsangbuk-do, 37859, KR)
HONG, Seong-Cheol (6261, Donghaean-ro, Nam-gu,,Pohang-si, Gyeongsangbuk-do, 37859, KR)
Application Number:
KR2017/014457
Publication Date:
June 28, 2018
Filing Date:
December 11, 2017
Export Citation:
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Assignee:
POSCO (6261, Donghaean-ro Nam-gu,,Pohang-si, Gyeongsangbuk-do, 37859, KR)
International Classes:
C21D10/00; B23K26/364; C21D8/12; H01F1/16
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (115 Teheran-ro, Gangnam-gu, Seoul, 06134, KR)
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