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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 9267196 B1

PDFFull Text
Date of Patent:
Feb. 23, 2016

Filed:

Mar. 05, 2012

Method of producing a hot rolled steel sheet

Applicants:

Riki Okamoto, Tokyo, JP;

Nobuhiro Fujita, Tokyo, JP;

Manabu Takahashi, Tokyo, JP;

Kunio Hayashi, Tokyo, JP;

Tetsuo Kishimoto, Tokyo, JP;

Kazuaki Nakano, Tokyo, JP;

Takeshi Yamamoto, Tokyo, JP;

Inventors:

Riki Okamoto, Tokyo, JP;

Nobuhiro Fujita, Tokyo, JP;

Manabu Takahashi, Tokyo, JP;

Kunio Hayashi, Tokyo, JP;

Tetsuo Kishimoto, Tokyo, JP;

Kazuaki Nakano, Tokyo, JP;

Takeshi Yamamoto, Tokyo, JP;

Assignee:

NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Deborah Yee

Int. Cl.
CPC ...
C21D 8/04 (2006.01); C22C 38/04 (2006.01); C22C 38/02 (2006.01); C22C 38/38 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); B21B 1/26 (2006.01); C22C 38/08 (2006.01); C22C 38/10 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/34 (2006.01); C21D 9/46 (2006.01); C21D 8/02 (2006.01); C22C 38/18 (2006.01); C21D 6/00 (2006.01);
U.S. Cl.
CPC ...
C22C 38/38 (2013.01); B21B 1/26 (2013.01); C21D 8/0226 (2013.01); C21D 8/0263 (2013.01); C21D 9/46 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/004 (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 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/18 (2013.01); C22C 38/34 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 2211/005 (2013.01);
Abstract

In a hot-rolled sheet, an average value of pole densities of an orientation group {100}<011> to {223}<110>, which is represented by an arithmetic mean of pole densities of orientations {100}<011>, {116}<110>, {114}<110>, {112}<110>, and {223}<110> in a thickness center portion of a thickness range of ⅝ to ⅜ from a surface of the steel sheet, is 1.0 to 6.5 and a pole density of a crystal orientation {332}<113> is 1.0 to 5.0; and a Lankford value rC in a direction perpendicular to a rolling direction is 0.70 to 1.10 and a Lankford value r30 in a direction that forms 30° with respect to the rolling direction is 0.70 to 1.10.

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