Title:
ZIRCONIUM ALLOYS WITH IMPROVED CORROSION RESISTANCE AND METHOD FOR FABRICATING ZIRCONIUM ALLOYS WITH IMPROVED CORROSION RESISTANCE
Document Type and Number:
WIPO Patent Application WO2005094504
Kind Code:
B1
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.
More Like This:
Inventors:
COLBURN DAVID (US)
BOSHERS JAMES A (US)
COMSTOCK ROBERT (US)
COOK TERRENCE (US)
DAHLBACK MATS (SE)
FILE PENNY (US)
FOSTER JOHN P (US)
GARDE ANAND (US)
KESTERSON RONALD (US)
JOURDAIN PASCAL (SE)
MCCLARREN MICHAEL (US)
NUHFER LYNN (US)
PARTEZANA JONNA (US)
YUEH KENNETH (US)
BOSHERS JAMES A (US)
COMSTOCK ROBERT (US)
COOK TERRENCE (US)
DAHLBACK MATS (SE)
FILE PENNY (US)
FOSTER JOHN P (US)
GARDE ANAND (US)
KESTERSON RONALD (US)
JOURDAIN PASCAL (SE)
MCCLARREN MICHAEL (US)
NUHFER LYNN (US)
PARTEZANA JONNA (US)
YUEH KENNETH (US)
Application Number:
PCT/US2005/009727
Publication Date:
March 13, 2008
Filing Date:
March 23, 2005
Export Citation:
Assignee:
WESTINGHOUSE ELECTRIC CORP (US)
COLBURN DAVID (US)
BOSHERS JAMES A (US)
COMSTOCK ROBERT (US)
COOK TERRENCE (US)
DAHLBACK MATS (SE)
FILE PENNY (US)
FOSTER JOHN P (US)
GARDE ANAND (US)
KESTERSON RONALD (US)
JOURDAIN PASCAL (SE)
MCCLARREN MICHAEL (US)
NUHFER LYNN (US)
PARTEZANA JONNA (US)
YUEH KENNETH (US)
COLBURN DAVID (US)
BOSHERS JAMES A (US)
COMSTOCK ROBERT (US)
COOK TERRENCE (US)
DAHLBACK MATS (SE)
FILE PENNY (US)
FOSTER JOHN P (US)
GARDE ANAND (US)
KESTERSON RONALD (US)
JOURDAIN PASCAL (SE)
MCCLARREN MICHAEL (US)
NUHFER LYNN (US)
PARTEZANA JONNA (US)
YUEH KENNETH (US)
International Classes:
C22C16/00
Download PDF: