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:
Sep. 22, 2026
Filed:
Dec. 14, 2022
Jfe Steel Corporation, Tokyo, JP;
Yoshiaki Zaizen, Tokyo, JP;
Yukino Miyamoto, Tokyo, JP;
Yoshihiko Oda, Tokyo, JP;
Tomoyuki Okubo, Tokyo, JP;
Souichiro Yoshizaki, Tokyo, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
Low iron loss and high magnetic flux density in a Si-gradient magnetic material are achieved. A non-oriented electrical steel sheet is a multilayer electrical steel sheet comprising of an inner layer and a surface layer located on each of both sides of the inner layer, wherein the surface layer and the inner layer have predetermined chemical compositions, ΔSi defined as a difference in Si content between the surface layer and the inner layer is 0.1 mass % to 0.5 mass %, a ratio t/t of a total thickness tof both surface layers to a sheet thickness t is 0.04 to 0.78, a ratio B/Bs is 0.825 or more, and iron loss Wand the sheet thickness t satisfy W≤13+80×t.