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:
Oct. 04, 2022
Filed:
Feb. 16, 2017
Applicant:
Jfe Steel Corporation, Tokyo, JP;
Inventors:
Assignee:
JFE STEEL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 8/12 (2006.01); C22C 38/60 (2006.01); H01F 1/147 (2006.01); C22C 38/00 (2006.01); C22C 38/12 (2006.01); C22C 38/06 (2006.01); C21D 1/28 (2006.01); C22C 38/08 (2006.01); H01F 1/16 (2006.01); C22C 38/14 (2006.01); C22C 38/34 (2006.01); C22C 38/16 (2006.01); C22C 38/02 (2006.01); C21D 9/46 (2006.01); C22C 38/04 (2006.01); C21D 8/02 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/54 (2006.01);
U.S. Cl.
CPC ...
C21D 8/12 (2013.01); C21D 1/28 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0273 (2013.01); C21D 8/1205 (2013.01); C21D 8/1261 (2013.01); C21D 8/1266 (2013.01); C21D 8/1272 (2013.01); C21D 8/1283 (2013.01); C21D 9/46 (2013.01); C22C 38/001 (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 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/34 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/54 (2013.01); C22C 38/60 (2013.01); H01F 1/147 (2013.01); H01F 1/14783 (2013.01); H01F 1/16 (2013.01); C21D 2201/05 (2013.01);
Abstract
To improve and stabilize magnetic properties, a steel sheet is soaked in a temperature range of 1000° C. or more and 1120° C. or less for 200 sec or less and then soaked in a temperature range of 650° C. or more and 1000° C. or less for 200 sec or less in annealing before final cold rolling, and the amount of Al in precipitates after the annealing before the final cold rolling is limited to 50% or more of the total amount of Al contained in the steel slab.