Method of making an electrical steel sheet provided with insulating coating

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United States of America Patent

PATENT NO 11177052
APP PUB NO 20190348195A1
SERIAL NO

16517760

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method for forming an insulating coating on an electrical steel sheet is provided. The method includes preparing a treatment solution by adding a Si compound to water and applying the treatment solution to a surface of the electrical steel sheet. Fe in the electrical steel sheet dissolves in the treatment solution and, thereafter, the electrical steel sheet and treatment solution are baked to form the insulating film. In the insulating film, a coating weight of Si in terms of SiO2 is 50% to 99% of the total coating weight, and a ratio (Fe/Si) of content of Fe to content of Si in the insulating coating is 0.01 to 0.6 on a molar basis.

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Patent Owner(s)

  • JFE STEEL CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujibayashi, Nobue Chiba, JP 17 62
Muramatsu, Naoki Chiba, JP 40 98
Nakagawa, Nobuko Chiba, JP 17 20
Sashi, Kazumichi Chiba, JP 18 62
Tada, Chiyoko Chiba, JP 25 101

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