METHOD FOR REFINING MAGNETIC DOMAIN OF GRAIN-ORIENTED ELECTRICAL STEEL PLATE AND DEVICE THEREFOR

WIPO Patent Application WO/2018/117510

A2

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.

WO/2016/085747	APPARATUS FOR CAVITATION PEENING OF A METAL PART AND METHOD THEREFORE
WO/2018/131819	METHOD FOR REFINING MAGNETIC DOMAINS OF GRAIN-ORIENTED ELECTRICAL STEEL SHEET
WO/2004/028739	METHOD AND DEVICE FOR CREATING INTERNAL COMPRESSION STRESSES WITHIN THE SURFACE OF WORKPIECES

LEE GYOO-TAEK (KR)
LEE JU SEUNG (KR)
HONG SEONG-CHEOL (KR)

PCT/KR2017/014457

June 28, 2018

December 11, 2017

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POSCO (KR)

C21D10/00; B23K26/364; C21D8/12; H01F1/16

YOU ME PATENT AND LAW FIRM (KR)

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