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 12590350 B1

PDFFull Text
Date of Patent:
Mar. 31, 2026

Filed:

Nov. 30, 2022

Steel sheet, member, and method for producing them

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Yoshiyasu Kawasaki, Tokyo, JP;

Tatsuya Nakagaito, Tokyo, JP;

Shunsuke Yamamoto, Tokyo, JP;

Katsuya Hoshino, Tokyo, JP;

Assignee:

JFE Steel Corporation, Tokyo, JP;

Attorney:

Buchanan Ingersoll & Rooney PC

Primary Examiner:

Adam Krupicka

Int. Cl.
CPC ...
C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 8/0221 (2026.01); C21D 8/0247 (2026.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/52 (2006.01); C22C 38/54 (2006.01); C22C 38/58 (2006.01); C22C 38/60 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (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); C21D 8/0263 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (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 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/52 (2013.01); C22C 38/54 (2013.01); C22C 38/58 (2013.01); C22C 38/60 (2013.01);
Abstract

A steel sheet and a member with a TS of 590 MPa or more and a method for producing them are disclosed. A base steel sheet has a specified chemical composition. When nanohardness is measured at 300 points or more in a 50 μm×50 μm region on a sheet surface at a quarter depth position, the ratio of a nanohardness of 7.0 GPa or more is 0.10 or less, the nanohardness of the sheet surface at the quarter depth position has a standard deviation σ of 1.8 GPa or less, and the nanohardness of the sheet surface at a half depth position has a standard deviation σ of 2.2 GPa or less.

Find Patent Forward Citations

Kawasaki, Yoshiyasu. (2026). Steel sheet, member, and method for producing them (U.S. Patent No. 12590350). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12590350

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

Loading…