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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.:

US 10822678 B1

PDFFull Text
Date of Patent:
Nov. 03, 2020

Filed:

Nov. 17, 2015

Non-oriented electrical steel sheet and method for producing the same

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Tadashi Nakanishi, Tokyo, JP;

Hiroaki Nakajima, Tokyo, JP;

Tomoyuki Okubo, Tokyo, JP;

Yoshihiko Oda, Tokyo, JP;

Assignee:

JFE STEEL CORPORATION, Tokyo, JP;

Attorney:

RatnerPrestia

Primary Examiner:

Jie Yang

Int. Cl.
CPC ...
C22C 38/06 (2006.01); C22C 38/00 (2006.01); H01F 1/16 (2006.01); C21D 8/12 (2006.01); C21C 7/064 (2006.01); C22C 38/16 (2006.01); C22C 38/08 (2006.01); C22C 38/60 (2006.01); C22C 38/34 (2006.01); C22C 38/18 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); H01F 1/34 (2006.01);
U.S. Cl.
CPC ...
C22C 38/002 (2013.01); C21C 7/064 (2013.01); C21D 8/1205 (2013.01); C21D 8/1233 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/004 (2013.01); C22C 38/005 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/16 (2013.01); C22C 38/18 (2013.01); C22C 38/34 (2013.01); C22C 38/60 (2013.01); H01F 1/16 (2013.01); H01F 1/342 (2013.01); C21D 8/1222 (2013.01); C21D 8/1272 (2013.01); Y02P 10/20 (2015.11);
Abstract

When a non-oriented electrical steel sheet is produced by hot rolling a slab containing, by mass %, C: not more than 0.0050%, Si: 1.5-5.0%, Mn: 0.20-3.0%, sol. Al: not more than 0.0050%, P: not more than 0.2%, S: not more than 0.0050% and N: not more than 0.0040% to form a hot rolled sheet, cold rolling the hot rolled sheet without conducting a hot band annealing and then subjecting to a finish annealing, a compositional ratio of CaO in oxide-based inclusions existing in the slab defined by CaO/(SiO+AlO+CaO) is set to not less than 0.4 and/or a compositional ratio of AlOdefined by AlO/(SiO+AlO+CaO) is set to not less than 0.3, and a coiling temperature in the hot rolling is set to not lower than 650° C.

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