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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 10626486 B1

PDFFull Text
Date of Patent:
Apr. 21, 2020

Filed:

Jul. 02, 2015

Stainless steel and production method therefor

Applicant:

Jfe Steel Corporation, Chiyoda-ku, Tokyo, JP;

Inventors:

Akito Mizutani, Tokyo, JP;

Masataka Yoshino, Tokyo, JP;

Mitsuyuki Fujisawa, Tokyo, JP;

Ayako Ta, Tokyo, JP;

Assignee:

JFE STEEL CORPORATION, Chiyoda-ku, Tokyo, JP;

Attorney:

Kenja IP Law PC

Primary Examiner:

Weiping Zhu

Int. Cl.
CPC ...
C22C 38/40 (2006.01); C21D 9/46 (2006.01); C22C 38/54 (2006.01); C22C 38/00 (2006.01); C22C 38/52 (2006.01); C22C 38/42 (2006.01); C21D 8/02 (2006.01); C22C 38/50 (2006.01); C21D 6/00 (2006.01); C22C 38/44 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01);
U.S. Cl.
CPC ...
C22C 38/40 (2013.01); C21D 6/002 (2013.01); C21D 8/0263 (2013.01); C21D 8/0273 (2013.01); C21D 9/46 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/005 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/50 (2013.01); C22C 38/52 (2013.01); C22C 38/54 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01);
Abstract

Stainless steel that has excellent formability and ridging resistance and can be produced with high productivity is provided. The stainless steel comprises: a chemical composition containing, in mass %, C: 0.005% to 0.050%, Si: 0.01% to 1.00%, Mn: 0.01% to 1.0%, P: 0.040% or less, S: 0.010% or less, Cr: 15.5% to 18.0%, Ni: 0.01% to 1.0%, Al: 0.001% to 0.10%, and N: 0.005% to 0.06%, with a balance being Fe and incidental impurities; and a microstructure containing a martensite phase of 1% to 10% in volume fraction with respect to a whole volume of the microstructure.

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