David James Colburn

US Patent:

20060243358, Nov 2, 2006

Filed:

Mar 23, 2005

Appl. No.:

11/087844

Inventors:

David Colburn - Columbia SC, US
Robert Comstock - Irwin PA, US
Terrence Cook - Riverdale UT, US
Mats Dahlback - Vasteras, SE
John Foster - Bluffton SC, US
Anand Garde - Columbia SC, US
Pascal Jourdain - Vasteras, SE
Ronald Kesterson - Columbia SC, US
Michael McClarren - New Alexandria PA, US
Lynn Nuhfer - Pittsburgh PA, US
Jonna Partezana - Pittsburgh PA, US
Kenneth Yueh - Columbia SC, US
James Boshers - Marshville NC, US
Penney File - Lusby MD, US

International Classification:

C22F 1/18
C22C 16/00

US Classification:

148672000, 420423000

Abstract:

Articles, such as tubing or strips, which have excellent corrosion resistance to water or steam at elevated temperatures, are produced from alloys having 0.2 to 1.5 weight percent niobium, 0.01 to 0.45 weight percent iron, at least one additional alloy element selected from 0.02 to 0.8 weight percent tin, 0.05 to 0.5 weight percent chromium, 0.02 to 0.3 weight percent copper, 0.1 to 0.3 weight percent vanadium, 0.01 to 0.1 weight percent nickel, the balance at least 97 weight percent zirconium, including impurities, wherein the alloy may be fabricated from a process of forging the zirconium alloy into a material, beta quenching the material, forming the material by extruding or hot rolling the material, cold working the material with one or a multiplicity of cold working steps, wherein the cold working step includes cold reducing the material and annealing the material at an intermediate anneal temperature of 960-1105 F., and final working and annealing of the material. The articles formed also show improved weld corrosion resistance with the addition of chromium.

US Patent:

20100128834, May 27, 2010

Filed:

Feb 1, 2010

Appl. No.:

12/697322

Inventors:

David Colburn - Columbia SC, US
Robert Comstock - Irwin PA, US
Terrence Cook - Riverdale UT, US
Mats Dahlback - Vasteras, SE
John P. Foster - Bluffton SC, US
Anand Garde - Columbia SC, US
Pascal Jourdain - Vasteras, SE
Ronald Kesterson - Columbia SC, US
Micheal McClarren - New Alexandria PA, US
Lynn Nuhfer - Pittsburgh PA, US
Jonna Partezana - Finleyville PA, US
Kenneth Yueh - Columbia SC, US
James A. Boshers - Marshville NC, US
Penney File - Lusby MD, US

Assignee:

Westinghouse Electric Company LLC - Cranberry Township PA

International Classification:

G21C 3/07
C22C 16/00

US Classification:

376412, 420423, 420422, 148421

Abstract:

Articles, such as tubing or strips, which have excellent corrosion resistance to water or steam at elevated temperatures, are produced from alloys having 0.2 to 1.5 weight percent niobium, 0.01 to 0.45 weight percent iron, at least one additional alloy element selected from 0.02 to 0.8 weight percent tin, 0.05 to 0.5 weight percent chromium, 0.02 to 0.3 weight percent copper, 0.1 to 0.3 weight percent vanadium, 0.01 to 0.1 weight percent nickel, the balance at least 97 weight percent zirconium, including impurities, wherein the alloy may be fabricated from a process of forging the zirconium alloy into a material, beta quenching the material, forming the material by extruding or hot rolling the material, cold working the material with one or a multiplicity of cold working steps, wherein the cold working step includes cold reducing the material and annealing the material at an intermediate anneal temperature of 960-1105 F., and final working and annealing of the material. The articles formed also show improved weld corrosion resistance with the addition of chromium.

US Patent:

20110293466, Dec 1, 2011

Filed:

Jun 16, 2011

Appl. No.:

13/161563

Inventors:

JOHN P. FOSTER - Bluffton SC, US
David COLBURN - Ogden UT, US
Robert COMSTOCK - Irwin PA, US
Terrence COOK - Riverdale UT, US
Mats DAHLBACK - Vasteras, SE
Anand GARDE - Columbia SC, US
Pascal JOURDAIN - Vasteras, SE
Ronald KESTERSON - Columbia SC, US
Michael MCCLARREN - New Alexandria PA, US
Dianna Lynn SVEC NUHFER - Pittsburgh PA, US
Guirong PAN - Sumter SC, US
Jonna Partezana MUNDORFF - Finleyville PA, US
Hsiang Ken YUEH - Charlotte NC, US
James BOSHERS - Marshville NC, US
Penney FILE - Lusby MD, US
Bethany Boshers - , US

Assignee:

WESTINGHOUSE ELECTRIC COMPANY LLC - Cranberry Township PA

International Classification:

C22C 16/00

US Classification:

420423, 420422

Abstract:

Articles, such as tubing or strips, which have excellent corrosion resistance to water or steam at elevated temperatures, are produced from alloys having 0.2 to 1.5 weight percent niobium, 0.01 to 0.6 weight percent iron, and optionally additional alloy elements selected from the group consisting of tin, chromium, copper, vanadium, and nickel with the balance at least 97 weight percent zirconium, including impurities, where a necessary final heat treatment includes one of i) a SRA or PRXA (15-20% RXA) final heat treatment, or ii) a PRXA (80-95% RXA) or RXA final heat treatment.