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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 10882090 B1

PDFFull Text
Date of Patent:
Jan. 05, 2021

Filed:

Jun. 22, 2017

Method for forming a hollow of a ferritic fecral alloy into a tube

Applicant:

Sandvik Materials Technology Deutschland Gmbh, Düsseldorf, DE;

Inventors:

Thomas Froböse, Versmold, DE;

Fernando Rave, Västerås, SE;

Jonas Gynnerstedt, Järbo, SE;

Assignee:

Sandvik Materials Technology Deutschland GmbH, Düsseldorf, DE;

Attorney:

Morgan, Lewis & Bockius LLP

Primary Examiner:

Edward T Tolan

Int. Cl.
CPC ...
B21B 21/00 (2006.01); B21B 3/00 (2006.01); B21C 1/00 (2006.01); B21C 1/24 (2006.01); C21D 8/10 (2006.01); C21D 9/08 (2006.01); C21D 1/42 (2006.01); B21C 9/00 (2006.01); C21D 6/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/22 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); F16L 9/02 (2006.01);
U.S. Cl.
CPC ...
B21B 21/00 (2013.01); B21B 3/00 (2013.01); B21C 1/003 (2013.01); B21C 1/24 (2013.01); B21C 9/00 (2013.01); C21D 1/42 (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); F16L 9/02 (2013.01); B21B 2003/001 (2013.01); C21D 2211/005 (2013.01); Y02P 10/25 (2015.11);
Abstract

The present invention relates to a method for forming a hollowof a ferritic FeCrAl alloy into a tube. While tubes made of powder metallurgical, dispersion hardened, ferritic FeCrAl alloys are commercially available, hollows made of FeCrAl alloys so far can hardly be formed into tubes of small dimensions. The major reason for the problems in forming hollows of a ferritic FeCrAI alloy into a finished product is that FeCrAl alloys are brittle. It is therefore an aspect of the present invention to provide a tubemade of a ferritic FeCrAl alloy having arbitrary small dimensions. Furthermore, it is an aspect of the present invention to provide a machineand a method for forming a tubular hollowinto a finished tubeof a ferritic FeCrAl alloy. At least one of the above aspects is addressed by a method for forming a hollow into a tubecomprising the steps providing the hollowof a ferritic FeCrAl alloy, heating the hollowto a temperature in a range from 90° C. to 150° C., and forming the heated hollowby pilger milling or drawing into the tube.

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