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:
Dec. 02, 2025
Filed:
Aug. 31, 2021
Jfe Steel Corporation, Tokyo, JP;
Takuya Yamada, Tokyo, JP;
Takashi Terashima, Tokyo, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
A method of stably producing grain-oriented electrical steel sheets with excellent film properties and magnetic properties that comprises subjecting a steel slab containing predetermined additive elements to hot rolling; subjecting the hot-rolled sheet to cold rolling to have a final sheet thickness; subjecting the cold-rolled sheet to decarburization annealing; applying an annealing separator having MgO as a main component to the decarburization annealing sheet; and subjecting the decarburization annealing sheet to finish annealing. The main component of the annealing separator has a BET specific surface area ratio HO/Nof 0.6 to 1.6 and a percentage of particles with a particle size of 40 μm or more in a slurry state of 5 mass % or less.