Grain oriented electrical steel sheet, forming method for insulation coating of grain oriented electrical steel sheet, and producing method for grain oriented electrical steel sheet

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United States of America Patent

PATENT NO 11866812
SERIAL NO

17427535

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Abstract

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A grain oriented electrical steel sheet includes a base steel sheet, an oxide layer, and a tension-insulation coating. When a glow discharge spectroscopy is conducted in a region from a surface of the tension-insulation coating to an inside of the base steel sheet, a sputtering time Fe0.5 at which a Fe emission intensity becomes 0.5 times as compared with a saturation value thereof and a sputtering time Fe0.05 at which a Fe emission intensity becomes 0.05 times as compared with the saturation value satisfy (Fe0.5−Fe0.05)/Fe0.5≥0.35. A maximal point of a Cr emission intensity is included between the Fe0.05 and the Fesat. Moreover, a magnetic flux density B8 in a rolling direction of the grain oriented electrical steel sheet is 1.90 T or more.

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Patent Owner(s)

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

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kataoka, Takashi Tokyo, JP 81 1132
Kubota, Masamitsu Tokyo, JP 3 0
Tada, Hirotoshi Tokyo, JP 10 9
Takeda, Kazutoshi Tokyo, JP 125 341
Tanaka, Ichiro Tokyo, JP 105 748

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