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. 19, 2016
Filed:
Aug. 04, 2011
Masanori Takenaka, Tokyo, JP;
Minoru Takashima, Tokyo, JP;
Hiroi Yamaguchi, Tokyo, JP;
Takeshi Omura, Tokyo, JP;
Masanori Takenaka, Tokyo, JP;
Minoru Takashima, Tokyo, JP;
Hiroi Yamaguchi, Tokyo, JP;
Takeshi Omura, Tokyo, JP;
JFE Steel Corporation, , JP;
Abstract
A grain oriented electrical steel sheet has sufficiently low iron loss and having less conventionally-concerned warpage of the steel sheet even after the steel sheet is subjected to artificial magnetic domain refining treatment, where strain-introducing treatment is conducted with high energy so that an iron loss-reducing effect can be maximized. The grain oriented electrical steel sheet is obtained by adjusting tension to be applied to a tension-applying insulating coating, or to both surfaces of the steel sheet by the tension-applying insulating coating, before strain-introducing treatment in the range of Formula (1):1.0≦(tension applied to non-strain-introduced surface)/(tension applied to strain-introduced surface)≦2.0  (1),and by controlling the amount of warpage of the steel sheet toward the strain-introduced surface side after strain-introducing treatment in the range of 1 mm or more and 10 mm or less.