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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 11111552 B1

PDFFull Text
Date of Patent:
Sep. 07, 2021

Filed:

Nov. 12, 2013

Methods for processing metal alloys

Applicant:

Ati Properties Llc, Albany, OR (US);

Inventors:

Robin M. Forbes Jones, Charlotte, NC (US);

Ramesh S. Minisandram, Charlotte, NC (US);

Assignee:

ATI PROPERTIES LLC, Albany, OR (US);

Attorneys:

Robert J. Toth

K&L Gates LLP

Primary Examiner:

Nicholas A Wang

Int. Cl.
CPC ...
C21D 8/00 (2006.01); C21D 7/13 (2006.01); C21D 1/18 (2006.01); C22F 1/10 (2006.01); C22F 1/18 (2006.01); C22F 1/00 (2006.01); C22C 38/58 (2006.01); C22C 38/44 (2006.01); C22C 38/42 (2006.01); C22C 38/02 (2006.01); C22C 38/00 (2006.01); C22C 38/40 (2006.01); C22C 19/05 (2006.01); C22C 30/02 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C22C 14/00 (2006.01); C22C 19/07 (2006.01);
U.S. Cl.
CPC ...
C21D 8/005 (2013.01); C21D 1/18 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 7/13 (2013.01); C21D 8/021 (2013.01); C21D 8/0247 (2013.01); C22C 19/056 (2013.01); C22C 30/02 (2013.01); C22C 38/002 (2013.01); C22C 38/004 (2013.01); C22C 38/02 (2013.01); C22C 38/40 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/58 (2013.01); C22F 1/002 (2013.01); C22F 1/10 (2013.01); C22F 1/183 (2013.01); C21D 2211/001 (2013.01); C21D 2211/004 (2013.01); C22C 14/00 (2013.01); C22C 19/05 (2013.01); C22C 19/051 (2013.01); C22C 19/07 (2013.01);
Abstract

A method of processing a metal alloy includes heating to a temperature in a working temperature range from a recrystallization temperature of the metal alloy to a temperature less than an incipient melting temperature of the metal alloy, and working the alloy. At least a surface region is heated to a temperature in the working temperature range. The surface region is maintained within the working temperature range for a period of time to recrystallize the surface region of the metal alloy, and the alloy is cooled so as to minimize grain growth. In embodiments including superaustenitic and austenitic stainless steel alloys, process temperatures and times are selected to avoid precipitation of deleterious intermetallic sigma-phase. A hot worked superaustenitic stainless steel alloy having equiaxed grains throughout the alloy is also disclosed.

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