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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 9534271 B1

PDFFull Text
Date of Patent:
Jan. 03, 2017

Filed:

Dec. 25, 2012

Hot rolled steel sheet and method for manufacturing the same

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Noriaki Kosaka, Tokyo, JP;

Yoshimasa Funakawa, Tokyo, JP;

Masato Shigemi, Tokyo, JP;

Hidekazu Ookubo, Tokyo, JP;

Tokunori Kanemura, Tokyo, JP;

Assignee:

JFE Steel Corporation, , JP;

Attorney:

DLA Piper LLP (US)

Primary Examiner:

Deborah Yee

Int. Cl.
CPC ...
C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/16 (2006.01); C22C 38/04 (2006.01); C22C 38/14 (2006.01); C21D 9/46 (2006.01); C22C 38/60 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); B32B 15/01 (2006.01); C22C 38/10 (2006.01); C22C 38/42 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01);
U.S. Cl.
CPC ...
C21D 8/0263 (2013.01); B32B 15/01 (2013.01); C21D 8/0226 (2013.01); C21D 9/46 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/007 (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 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/42 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01); C22C 38/60 (2013.01); C21D 2211/005 (2013.01); Y10T 428/12799 (2015.01);
Abstract

A semi-manufactured steel material has a chemical composition including, by mass %, C: 0.055% to 0.15%, Si: not more than 0.2%, Mn: not more than 1.3%, P: not more than 0.03%, S: not more than 0.007%, Al: not more than 0.1%, N: not more than 0.01%, and Ti: 0.14% to 0.30%, the balance comprising Fe and inevitable impurities. In the composition, 1.0≦([C]/12)/([Ti*]/48) is satisfied ([C], [S], [N] and [Ti]: contents (mass %) of the respective elements, and [Ti*]=[Ti]−3.4×[N]−1.5×[S]), and the contents of niobium and boron as impurities are limited to Nb: less than 0.03% and B: less than 0.0005%.

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