logo

For the Inventor, By the Inventor

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 12637730 B1

PDFFull Text
Date of Patent:
May. 26, 2026

Filed:

Oct. 23, 2020

Steel sheet, member, and methods for producing the same

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Takuya Hirashima, Tokyo, JP;

Shimpei Yoshioka, Tokyo, JP;

Shinjiro Kaneko, Tokyo, JP;

Soshi Yoshimoto, Tokyo, JP;

Tomohiro Hashimukai, Tokyo, JP;

Assignee:

JFE Steel Corporation, Tokyo, JP;

Attorney:

Buchanan Ingersoll & Rooney PC

Primary Examiner:

Anthony M Liang

Int. Cl.
CPC ...
C21D 9/46 (2006.01); C21D 1/18 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2026.01); C21D 8/0221 (2026.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/14 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/32 (2006.01); C22C 38/38 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); C21D 1/18 (2013.01); C21D 6/001 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/02 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/14 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/32 (2013.01); C22C 38/38 (2013.01); C21D 2211/008 (2013.01);
Abstract

The steel sheet of the present invention has a steel microstructure containing, in area fraction, martensite: from 20% to 100%, ferrite: from 0% to 80%, and another metal phase: 5% or less, and in which a ratio of a dislocation density in metal phases on a surface of the steel sheet to a dislocation density in the metal phases in a thicknesswise central portion of the steel sheet is from 30% to 80%. The maximum amount of warpage of the steel sheet when the steel sheet is sheared to a length of 1 m in a rolling direction is 15 mm or less.

Find Patent Forward Citations

Hirashima, Takuya. (2026). Steel sheet, member, and methods for producing the same (U.S. Patent No. 12637730). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12637730

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…