logo

For the Inventor, By the Inventor

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 9863023 B1

PDFFull Text
Date of Patent:
Jan. 09, 2018

Filed:

Oct. 22, 2013

Ferritic stainless steel and method for manufacturing the same

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Tomohiro Ishii, Chiba, JP;

Shin Ishikawa, Chiba, JP;

Hiroyuki Ogata, Chiba, JP;

Hiroki Ota, Chiba, JP;

Assignee:

JFE Steel Corporation, Tokyo, JP;

Attorney:

RatnerPrestia

Primary Examiner:

Deborah Yee

Int. Cl.
CPC ...
C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C21D 7/02 (2006.01); C25F 1/06 (2006.01); C22C 38/58 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C25F 1/00 (2006.01); B21B 1/22 (2006.01); C21D 1/26 (2006.01); C21D 6/00 (2006.01); C21D 8/00 (2006.01); C22C 38/42 (2006.01); C22C 38/54 (2006.01);
U.S. Cl.
CPC ...
C22C 38/58 (2013.01); B21B 1/22 (2013.01); C21D 1/26 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/005 (2013.01); C21D 9/46 (2013.01); C22C 38/001 (2013.01); C22C 38/004 (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 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01); C25F 1/00 (2013.01); C21D 2211/004 (2013.01); C21D 2211/005 (2013.01);
Abstract

Provided are a ferritic stainless steel having a corrosion resistance at a certain level or more and a temper-color removal performance at a certain level or more and a method for manufacturing the ferritic stainless steel. A ferritic stainless steel has a composition containing, by mass %, C: 0.001% to 0.030%, Si: 0.03% to 0.30%, P: 0.05% or less, S: 0.01% or less, Cr: more than 22.0% to 28.0%, Mo: 0.2% to 3.0%, Al: 0.01% to 0.15%, Ti: more than 0.30% to 0.80%, V: 0.001% to 0.080%, and N: 0.001% to 0.050%; Mn: 0.05% to 0.30% and Ni: 0.01% to 5.00%, or Mn: 0.05% to 2.00% and Ni: 0.01% to 0.30%; Nb: 0.05% or less as an optional component; and the balance being Fe and inevitable impurities, and the steel has a surface where TiN having a grain diameter of 1 μm or more is distributed at a density of 30 particles/mmor more.

Find Patent Forward Citations

Loading…