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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 9370810 B1

PDFFull Text
Date of Patent:
Jun. 21, 2016

Filed:

Mar. 30, 2012

Stainless steel plate

Applicants:

Takafumi Kawagoe, Yamaguchi, JP;

Tomoharu Shigetomi, Yamaguchi, JP;

Junichi Katsuki, Yamaguchi, JP;

Inventors:

Takafumi Kawagoe, Yamaguchi, JP;

Tomoharu Shigetomi, Yamaguchi, JP;

Junichi Katsuki, Yamaguchi, JP;

Assignee:

NISSHIN STEEL CO., LTD., Tokyo, JP;

Attorney:

Troutman Sanders LLP

Primary Examiner:

Michael E La Villa

Int. Cl.
CPC ...
B21B 3/02 (2006.01); B21B 1/22 (2006.01); C22C 38/58 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/40 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/48 (2006.01); C21D 9/46 (2006.01);
U.S. Cl.
CPC ...
B21B 3/02 (2013.01); B21B 1/227 (2013.01); C21D 6/002 (2013.01); C21D 8/0236 (2013.01); C21D 8/0273 (2013.01); C21D 9/46 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/40 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/48 (2013.01); C22C 38/58 (2013.01); C21D 8/0226 (2013.01); Y10T 428/12951 (2015.01); Y10T 428/12993 (2015.01);
Abstract

A stainless steel plate is manufactured by performing temper rolling using a dull roller after the finish cold rolling and bright annealing. The stainless steel plate has an arithmetic mean roughness Ra of 0.2 to 1.2 μm in a direction perpendicular to the rolling direction of the steel plate surface. Furthermore, the stainless steel plate has a transfer ratio of 15 to 70% which is an area ratio of a portion onto which a dull pattern is transferred relative to the steel plate surface. In addition, the micro-pits being formed in the steel plate surface, having a depth of 0.5 μm or more, and having an opening area of 10 μmor more, have an existing density in the steel plate surface of 10.0 or less per 0.01 mm, and an opening area ratio in the steel plate surface of 1.0% or less.

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