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:
Aug. 02, 2022
Filed:
Dec. 10, 2018
Jfe Steel Corporation, Tokyo, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
Provided is a multilayer electrical steel sheet having both low high-frequency iron loss and high magnetic flux density. The multilayer electrical steel sheet has an inner layer and surface layers provided on both sides of the inner layer, in which the surface layers and the inner layer have a predetermined chemical composition, the multilayer electrical steel sheet having: ΔSi of 0.5 mass % to 4.0 mass %; ΔAl of 0.05 mass % or less; a ratio of tto t represented by t/t of from 0.10 to 0.70; a magnetic flux density Bof 1.3 T or more; and a ratio of Bto Brepresented by B/Bof 0.45 or more; and an iron loss Win W/kg and the sheet thickness t in mm satisfy the following formula (1):≤15+140×  (1).