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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 11724299 B1

PDFFull Text
Date of Patent:
Aug. 15, 2023

Filed:

Dec. 21, 2018

Method for straightening of a fecral alloy tube

Applicant:

Sandvik Intellectual Property Ab, Sandviken, SE;

Inventors:

Fernando Rave, Västerås, SE;

Krister Wickman, Hallstahammar, SE;

Thomas Froböse, Versmold, DE;

Assignee:

Sandvik Intellectual Property AB, Sandviken, SE;

Attorney:

Morgan, Lewis & Bockius LLP

Primary Examiner:

Anthony M Liang

Int. Cl.
CPC ...
B21D 3/12 (2006.01); C22C 38/28 (2006.01); C22C 38/06 (2006.01); C22C 38/04 (2006.01); C22C 38/02 (2006.01); C22C 38/00 (2006.01); C22C 38/26 (2006.01); C21D 9/08 (2006.01); C21D 8/10 (2006.01); C21D 6/00 (2006.01); C22C 38/22 (2006.01); C21D 1/34 (2006.01);
U.S. Cl.
CPC ...
B21D 3/12 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/105 (2013.01); C21D 9/08 (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 38/22 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C21D 1/34 (2013.01);
Abstract

The present disclosure relates to a method for straightening of a tube comprising a ferritic FeCrAl-alloy. One reason for the challenges regarding the cold working of a hollow of a ferritic FeCrAl-alloy into a finished tube is that FeCrAl-alloys have a low ductility. Even if a tube of a FeCrAl-alloy is obtained by cold working a hollow into a tube, the tube can hardly be straightened. This is even more a problem if a tube obtained is annealed, wherein the annealing leads to a deformation of tube along the longitudinal direction of the tube. Therefore, there is a need for a method for straightening of a tube comprising a ferritic FeCrAl-alloy. Thus, according to the present disclosure a method for straightening of a tube is suggested, wherein the method comprises the steps of providing a tube comprising a ferritic FeCrAl-alloy, heating the tube, and straightening and forming the heated tube by stretching.

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