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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 10026534 B1

PDFFull Text
Date of Patent:
Jul. 17, 2018

Filed:

Jan. 16, 2014

Hot-rolled steel sheet for producing non-oriented electrical steel sheet and method of producing same

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Hiroaki Toda, Kurashiki, JP;

Yoshiaki Zaizen, Kurashiki, JP;

Tadashi Nakanishi, Kurashiki, JP;

Yoshihiko Oda, Fukuyama, JP;

Assignee:

JFE STEEL CORPORATION, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Brian Walck

Int. Cl.
CPC ...
C21D 8/12 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); H01F 1/147 (2006.01); C21D 6/00 (2006.01); C21D 9/46 (2006.01); C22C 38/12 (2006.01); C22C 38/00 (2006.01); H01F 41/02 (2006.01); B21B 3/02 (2006.01); C22C 38/60 (2006.01); H01F 1/16 (2006.01);
U.S. Cl.
CPC ...
H01F 1/14775 (2013.01); B21B 3/02 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/12 (2013.01); C21D 8/1222 (2013.01); C21D 8/1255 (2013.01); C21D 8/1261 (2013.01); C21D 9/46 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/004 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/12 (2013.01); C22C 38/60 (2013.01); H01F 1/16 (2013.01); H01F 41/02 (2013.01); H01F 1/14791 (2013.01);
Abstract

By using a hot-rolled steel sheet of a predetermined chemical composition, and annealing the hot-rolled steel sheet in nitrogen atmosphere at 1000° C. for 30 seconds, and then immersing in a solution of 7% HCl at 80° C. for 60 seconds to obtain a hot-rolled steel sheet having a pickling weight loss of 10 g/mor more and 35 g/mor less, it is possible to obtain a hot-rolled steel sheet for producing a non-oriented electrical steel sheet that not only has excellent magnetic properties such as iron loss properties and magnetic flux density, but also has reduced steel sheet surface defects and an excellent manufacturing yield.

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