Low core loss grain-oriented electrical steel sheet and method for producing the same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8016951
APP PUB NO 20090145526A1
SERIAL NO

11919580

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Abstract

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An object of the present invention is to provide a grain-oriented electrical steel sheet with low core loss and low magnetostriction and a method for producing the same. The grain-oriented electrical steel sheet is excellent in reduced core loss and magnetostriction while under a high flux density of 1.9 T, comprises a refined magnetic domain comprising a laser irradiated portion which has melted and resolidified to form a solidified layer, wherein the thickness of the solidified layer is 4 μm or less. The grain-oriented electrical steel sheet may further comprise a laser irradiated portion where a surface roughness Rz is small and a cross section viewed from a transverse direction has a concave portion having a width of 200 μm or less and a depth of 10 μm or less for further improvement.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL CORPORATION6-1 MARUNOUCHI 2-CHOME CHIYODA-KU TOKYO 100-8071

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Arai, Satoshi Hyogo, JP 235 3219
Hamamura, Hideyuki Chiba, JP 41 190
Kobayashi, Hideyuki Hyogo, JP 154 2018
Sakai, Tatsuhiko Chiba, JP 108 1003
Sato, Kaoru Hyogo, JP 129 2046

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