Linear groove formation method and linear groove forming apparatus, and method for manufacturing grain-oriented electrical steel sheet

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United States of America

PATENT NO 12195816
APP PUB NO 20220282349A1
SERIAL NO

17630249

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Abstract

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The linear groove formation method includes a resist forming process of forming a coated resist on a surface of a steel sheet, a laser irradiating process of irradiating laser beams onto the steel sheet while repeating a laser scanning in a direction intersecting a rolling direction of the steel sheet cyclically in the rolling direction of the steel sheet to remove the coated resist in portions irradiated with the laser beams, and an etching process of forming linear grooves by etching portions of the steel sheet from which the coated resist is removed. In the laser irradiating process, the coated resist is removed by using two or more laser irradiating devices, with a certain irradiation energy, a certain beam diameter in a direction perpendicular to a laser scanning direction, and a certain incidence angle with respect to the surface of the steel sheet.

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Patent Owner(s)

Patent OwnerAddress
JFE STEEL CORPORATION2-3 UCHISAIWAI-CHO 2-CHOME CHIYODA-KU TOKYO 1000011 ?1000011

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ichihara, Yoshihisa Tokyo, JP 19 2
Inoue, Hirotaka Tokyo, JP 45 206
Omura, Takeshi Tokyo, JP 65 449
Takajo, Shigehiro Tokyo, JP 49 133

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