GRAIN ORIENTED ELECTRICAL STEEL SHEET AND METHOD OF MANUFACTURING THE SAME
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United States of America Patent
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Feb 9, 2016
filing date -
Aug 6, 2010
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Abstract
A grain oriented electrical steel sheet includes forsterite film on a surface of base steel sheet; and a sulfur-concentrated portion in at least one of the forsterite film and an interface between the forsterite film and the base steel sheet by a presence ratio expressed as area-occupying ratio of the S-concentrated portion, of at least 2%, per 10000 μm2 of the surface of the base steel sheet, which has been subjected to magnetic domain refinement treatment by electron beam irradiation.
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