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:
May. 24, 2022
Filed:
Nov. 07, 2018
Applicant:
Jfe Steel Corporation, Tokyo, JP;
Inventors:
Katsutoshi Takashima, Tokyo, JP;
Takayuki Futatsuka, Tokyo, JP;
Kentaro Sato, Tokyo, JP;
Shimpei Yoshioka, Tokyo, JP;
Yoshihiko Ono, Tokyo, JP;
Yoshimasa Funakawa, Tokyo, JP;
Assignee:
JFE STEEL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C 38/58 (2006.01); C22C 38/54 (2006.01); C22C 38/52 (2006.01); C22C 38/50 (2006.01); C22C 38/48 (2006.01); C22C 38/46 (2006.01); C22C 38/44 (2006.01); C22C 38/42 (2006.01); C22C 38/06 (2006.01); C22C 38/02 (2006.01); C22C 38/00 (2006.01); C22C 38/60 (2006.01); B32B 15/01 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C23C 2/06 (2006.01); C23C 2/12 (2006.01); C21D 1/18 (2006.01); C22C 38/04 (2006.01); C22C 38/12 (2006.01); C23C 2/26 (2006.01); C23C 2/40 (2006.01); C23C 2/28 (2006.01); C23C 30/00 (2006.01); B32B 15/04 (2006.01); B32B 15/18 (2006.01); C22C 38/26 (2006.01); C22C 38/18 (2006.01); C22C 38/28 (2006.01); C22C 38/34 (2006.01); C22C 38/24 (2006.01); C22C 38/14 (2006.01); C22C 38/30 (2006.01); C22C 38/20 (2006.01); C22C 38/32 (2006.01); C22C 38/40 (2006.01); C22C 38/10 (2006.01); C22C 38/22 (2006.01); C22C 38/38 (2006.01); C22C 38/16 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); B32B 15/012 (2013.01); B32B 15/013 (2013.01); B32B 15/04 (2013.01); B32B 15/043 (2013.01); B32B 15/18 (2013.01); C21D 1/18 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0263 (2013.01); C21D 8/0273 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/10 (2013.01); C22C 38/105 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/18 (2013.01); C22C 38/20 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/30 (2013.01); C22C 38/32 (2013.01); C22C 38/34 (2013.01); C22C 38/38 (2013.01); C22C 38/40 (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); C23C 2/06 (2013.01); C23C 2/12 (2013.01); C23C 2/26 (2013.01); C23C 2/28 (2013.01); C23C 2/40 (2013.01); C23C 30/00 (2013.01); C23C 30/005 (2013.01); C21D 2211/001 (2013.01); C21D 2211/008 (2013.01); Y10T 428/12757 (2015.01); Y10T 428/12799 (2015.01); Y10T 428/12958 (2015.01); Y10T 428/12972 (2015.01); Y10T 428/26 (2015.01);
Abstract
Disclosed is a hot-pressed steel sheet member having a tensile strength of 1780 MPa or more and excellent bending collapsibility. The hot-pressed steel sheet member includes: a specific chemical composition; a microstructure in which an average grain size of prior austenite grains is 8 μm or less, a volume fraction of martensite is 90% or more, and a solute C content is 25% or less of a total C content; and a tensile strength of 1780 MPa or more.