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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 11795520 B1

PDFFull Text
Date of Patent:
Oct. 24, 2023

Filed:

Nov. 21, 2019

Hot-pressed member, method for manufacturing the same, and method for manufacturing steel sheet for hot-pressed member

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Shimpei Yoshioka, Tokyo, JP;

Yoshihiko Ono, Tokyo, JP;

Katsutoshi Takashima, Tokyo, JP;

Takayuki Futatsuka, Tokyo, JP;

Kentaro Sato, Tokyo, JP;

Assignee:

JFE STEEL CORPORATION, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Adam Krupicka

Int. Cl.
CPC ...
C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C23C 2/06 (2006.01); C23C 2/02 (2006.01); C21D 9/48 (2006.01); B32B 15/01 (2006.01); C21D 6/00 (2006.01); C22C 38/00 (2006.01); C22C 38/08 (2006.01); C22C 38/10 (2006.01); C22C 38/12 (2006.01); C22C 38/16 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/38 (2006.01); C22C 38/60 (2006.01); C23C 2/40 (2006.01); C23C 2/12 (2006.01);
U.S. Cl.
CPC ...
C21D 9/48 (2013.01); B32B 15/012 (2013.01); B32B 15/013 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 8/0205 (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 38/08 (2013.01); C22C 38/10 (2013.01); C22C 38/12 (2013.01); C22C 38/16 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/38 (2013.01); C22C 38/60 (2013.01); C23C 2/40 (2013.01); C21D 2211/008 (2013.01); C23C 2/06 (2013.01); C23C 2/12 (2013.01);
Abstract

A hot-pressed member having excellent bending collapsibility, a method for manufacturing the same, and a method for manufacturing a steel sheet for the hot-pressed member. The hot-pressed member includes a steel sheet as a base material, the steel sheet having a specified chemical composition. The hot-pressed member has a microstructure in which a martensite microstructure is present in a volume fraction of 70% or greater, and a number density of inclusions having a longest diameter of 25 μm or greater is 0.02/mmor less. The hot-pressed member has a tensile strength of 1.8 GPa or greater.

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