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:
Jul. 02, 2019
Filed:
Apr. 24, 2014
Applicant:
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Inventors:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21C 1/06 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/50 (2006.01); C22C 38/14 (2006.01); C22C 38/54 (2006.01); C21C 7/06 (2006.01); C21C 7/068 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/16 (2006.01); C22C 38/22 (2006.01); C22C 38/28 (2006.01); C21D 8/02 (2006.01); C21D 8/04 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/42 (2006.01); C21D 9/46 (2006.01);
U.S. Cl.
CPC ...
C22C 38/50 (2013.01); C21C 7/06 (2013.01); C21C 7/068 (2013.01); C21D 8/0226 (2013.01); C21D 8/0263 (2013.01); C21D 8/0426 (2013.01); C21D 8/0463 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/42 (2013.01); C22C 38/54 (2013.01); C21D 9/46 (2013.01); C21D 2211/004 (2013.01);
Abstract
A steel sheet according to the present invention includes a predetermined chemical composition, in which amounts of each elements by mass % in the chemical composition satisfy both of expression '0.3000≤{Ca/40.88+(REM/140)/2}/(S/32.07)' and expression 'Ca≤0.0058−0.0050×C', and a number density of carbonitrides including Ti which exists independently and has a long side of 5 μm or more is limited to 5 pieces/mmor less.