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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 9297056 B1

PDFFull Text
Expired
Date of Patent:
Mar. 29, 2016

Filed:

Feb. 24, 2012

Forged steel and welded structure for components for nuclear power plants

Applicants:

Hiroyuki Takaoka, Takasago, JP;

Nobuyuki Fujitsuna, Takasago, JP;

Inventors:

Hiroyuki Takaoka, Takasago, JP;

Nobuyuki Fujitsuna, Takasago, JP;

Assignee:

Kobe Steel, Ltd., Kobe-shi, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Deborah Yee

Int. Cl.
CPC ...
C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/00 (2006.01); C21D 1/18 (2006.01); C21D 8/02 (2006.01); G21C 13/087 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/58 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/54 (2006.01);
U.S. Cl.
CPC ...
C22C 38/001 (2013.01); C21D 1/18 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (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 38/42 (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); C22C 38/58 (2013.01); G21C 13/087 (2013.01); C21D 2211/003 (2013.01); Y02E 30/40 (2013.01); Y10T 403/477 (2015.01);
Abstract

A forged steel for components for nuclear power plants meets a specific chemical composition. The grain size number of a metal structure thereof is 4.5 to 7.0 in terms of ASTM grain size number. It is preferred that the content of N is 0.0100 mass % or more when the mass ratio (Al/N) of the content of Al to the content of N is 1.93 or more, and that the content of Al is 0.022 mass % or more when the mass ratio (Al/N) of the content of Al to the content of N is less than 1.93. The forged steel for components for nuclear power plants exhibits excellent strength, toughness and hydrogen cracking resistance even after being subjected to a stress relief heat treatment subsequent to welding.

Find Patent Forward Citations

Takaoka, Hiroyuki. (2016). Forged steel and welded structure for components for nuclear power plants (U.S. Patent No. 9297056). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9297056

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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