The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 2020
Filed:
Oct. 29, 2013
Jfe Steel Corporation, Chiyoda-ku, Tokyo, JP;
Shigehiro Takajo, Tokyo, JP;
Hirotaka Inoue, Tokyo, JP;
Seiji Okabe, Tokyo, JP;
Kazuhiro Hanazawa, Tokyo, JP;
JFE Steel Corporation, Tokyo, JP;
Abstract
The present invention provides a grain-oriented electrical steel sheet with reduced iron loss over a wide range of sheet thickness by providing a grain-oriented electrical steel sheet with an actually measured sheet thickness t (mm) that includes a closure domain region extending linearly in a direction from 60° to 120° with respect to the rolling direction on a surface of the steel sheet, the closure domain region being formed periodically at a spacing s (mm) in the rolling direction, such that h≥74.9t+39.1 (0.26≥t), h≥897t−174.7 (t>0.26), (w×h)/(s×1000)≤−12.6t+7.9 (t>0.22), and (w×h)/(s×1000)≤−40.6t+14.1 (t≤0.22), where h (μm) is the depth and w (μm) is the width of the closure domain region.