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. 29, 2017
Filed:
Aug. 08, 2013
Jfe Steel Corporation, Tokyo, JP;
Tadashi Nakanishi, Kurashiki, JP;
Yoshiaki Zaizen, Kurashiki, JP;
Yoshihiko Oda, Fukuyama, JP;
Hiroaki Toda, Kurashiki, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
Provided is a method for stably obtaining a non-oriented electrical steel sheet with high magnetic flux density and excellent productivity, at a low cost by casting in a continuous casting machine a slab having a chemical composition including by mass %, C≦0.0050%, 3.0%<Si≦5.0%, Mn≦0.10%, Al≦0.0010%, 0.040%<P≦0.2%, N≦0.0040%, 0.0003%≦S≦0.0050%, Ca≦0.0015%, and total of at least one element selected from Sn and Sb: 0.01% or more and 0.1% or less, balance including Fe and incidental impurities, subjecting the slab to heating, then subjecting the slab to hot rolling to obtain a hot rolled steel sheet, then subjecting the steel sheet to hot band annealing, pickling, subsequent single cold rolling to obtain a final sheet thickness, then subjecting the steel sheet to final annealing, wherein in the hot band annealing, soaking temperature is 900° C. or higher and 1050° C. or lower, and cooling rate after soaking is 5° C/s or more.