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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 9745642 B1

PDFFull Text
Date of Patent:
Aug. 29, 2017

Filed:

Mar. 08, 2013

Method for heat treating a metal tube or pipe, metal tube or pipe, and heat treatment furnace

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Osamu Miyahara, Tokyo, JP;

Toshihiro Imoto, Tokyo, JP;

Assignee:

NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;

Attorney:

Clark & Brody

Primary Examiner:

Scott Kastler

Int. Cl.
CPC ...
F27D 5/00 (2006.01); C21D 9/08 (2006.01); C22C 19/05 (2006.01); C22C 38/58 (2006.01); C22F 1/00 (2006.01); C22F 1/10 (2006.01); C21D 8/10 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/50 (2006.01); F22B 37/00 (2006.01); C21D 9/00 (2006.01); C22C 30/00 (2006.01); C22C 30/02 (2006.01); C22C 38/04 (2006.01); F16L 9/02 (2006.01); C22C 38/40 (2006.01); C21D 1/773 (2006.01); C21D 1/00 (2006.01); G21D 1/00 (2006.01); G21C 21/00 (2006.01);
U.S. Cl.
CPC ...
C21D 9/08 (2013.01); C21D 8/10 (2013.01); C21D 8/105 (2013.01); C21D 9/0025 (2013.01); C22C 19/05 (2013.01); C22C 19/053 (2013.01); C22C 19/055 (2013.01); C22C 19/056 (2013.01); C22C 19/058 (2013.01); C22C 30/00 (2013.01); C22C 30/02 (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 38/40 (2013.01); C22C 38/42 (2013.01); C22C 38/50 (2013.01); C22C 38/58 (2013.01); C22F 1/00 (2013.01); C22F 1/10 (2013.01); F16L 9/02 (2013.01); F22B 37/007 (2013.01); C21D 1/00 (2013.01); C21D 1/773 (2013.01); G21C 21/00 (2013.01); G21D 1/00 (2013.01);
Abstract

A method for heat treating a metal tube or pipe is provided to perform heat treatment in such a manner that metal tubes or pipes () to be accommodated in a heat treatment furnace are laid down on a plurality of cross beams () arranged along a longitudinal direction of the metal tubes or pipes with the distance between adjacent cross beams being in a range of 200 to 2500 mm. This makes it possible to inhibit bending and scratches of the metal tubes or pipes without causing discoloration and deterioration of the manufacturing efficiency for the metal tubes or pipes. When the metal tubes or pipes () are laid down on the cross beams (), spacers may be interposed between the metal tubes or pipes () and the cross beams () on which they are laid down.

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