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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 11180835 B1

PDFFull Text
Date of Patent:
Nov. 23, 2021

Filed:

Sep. 25, 2015

Steel sheet

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Kohei Ueda, Tokyo, JP;

Hiroyuki Kawata, Tokyo, JP;

Takayuki Kitazawa, Tokyo, JP;

Takeshi Yasui, Tokyo, JP;

Hiroyuki Ban, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Alexandra M Moore

Assistant Examiner:

Austin Pollock

Int. Cl.
CPC ...
C22C 38/38 (2006.01); C21D 9/46 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (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); C23F 17/00 (2006.01); C23G 1/08 (2006.01); C25D 3/12 (2006.01); C25D 5/36 (2006.01);
U.S. Cl.
CPC ...
C22C 38/38 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0278 (2013.01); C21D 9/46 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (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 38/16 (2013.01); C22C 38/22 (2013.01); C22C 38/28 (2013.01); C23F 17/00 (2013.01); C23G 1/08 (2013.01); C25D 3/12 (2013.01); C25D 5/36 (2013.01);
Abstract

A steel sheet has a predetermined chemical composition, and a surface exhibits an absorption peak at which a reflectance is not less than 50% nor more than 85% in a range of wave numbers of 1200 cmto 1300 cmby a Fourier transform-infrared spectroscopy analysis by a reflection absorption spectrometry method, and does not exhibit an absorption peak in a range of wave numbers of 1000 cmto 1100 cm, or exhibits an absorption peak at which a reflectance is 85% or more in the range of wave numbers of 1000 cmto 1100 cm, wherein Ni of 3 mg/mto 100 mg/madheres to the surface.

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