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:
Apr. 29, 2025
Filed:
Dec. 28, 2020
Applicant:
Kobe Steel, Ltd., Kobe, JP;
Inventors:
Kosuke Shibata, Kobe, JP;
Junichiro Kinugasa, Kobe, JP;
Keisuke Nakata, Kakogawa, JP;
Atsuhiro Shiraki, Kakogawa, JP;
Assignee:
Kobe Steel, Ltd., Kobe, JP;
Primary Examiner:
Int. Cl.
CPC ...
C21D 9/46 (2005.12); C21D 8/02 (2005.12); C22C 38/00 (2005.12); C22C 38/02 (2005.12); C22C 38/04 (2005.12); C22C 38/06 (2005.12); C22C 38/08 (2005.12); C22C 38/14 (2005.12); C22C 38/16 (2005.12);
U.S. Cl.
CPC ...
C21D 9/46 (2012.12); C21D 8/0236 (2012.12); C21D 8/0273 (2012.12); C22C 38/001 (2012.12); C22C 38/002 (2012.12); C22C 38/02 (2012.12); C22C 38/04 (2012.12); C22C 38/06 (2012.12); C22C 38/08 (2012.12); C22C 38/14 (2012.12); C22C 38/16 (2012.12); C21D 2211/008 (2012.12);
Abstract
A high-strength steel sheet with excellent delayed fracture resistance, having a tensile strength of 1700 MPa or larger, including a predetermined component composition, having a martensite structure whose ratio accounts for 95 area % or more of the entire metallographic structure, and having a transition metal carbide whose ratio accounts for 0.8 volume % or more of the entire metallographic structure.