EP 1394278 A1 20040303 - Reduced-tantalum superalloy composition and article made therefrom, and method for selecting a reduced-tantalum superalloy
Title (en)
Reduced-tantalum superalloy composition and article made therefrom, and method for selecting a reduced-tantalum superalloy
Title (de)
Superlegierung mit reduziertem Tantalgehalt und Produkt daraus, und Methode zur Auswahl einer Superlegierung mit reduziertem Tantalgehalt
Title (fr)
Superalliage ayant un taux réduit de tantale et produit fabriqué à partir de cet alliage, et méthode de sélection d'un alliage avec un taux réduit de tantale
Publication
Application
Priority
US 22974102 A 20020827
Abstract (en)
A superalloy article (20) has a composition consisting essentially of, in weight percent, from about 4 to about 12 percent cobalt, from about 3.5 to about 7 percent tungsten, from about 2 to about 9 percent chromium, from about 0.5 to about 4.5 percent tantalum, from about 5.5 to about 7.5 percent aluminum, from 0 to about 5.5 percent rhenium, from about 0.1 to about 1.2 percent titanium, from 0 to about 3 percent molybdenum, from 0 to about 3 percent ruthenium, from about 0.5 to about 2 percent columbium, about 0.01 percent maximum boron, about 0.07 percent maximum carbon, from about 0.3 to about 1 percent hafnium, about 0.01 percent maximum zirconium, about 0.03 percent maximum yttrium, from 0 to about 0.5 percent vanadium, about 0.01 percent maximum cerium, and about 0.01 percent maximum lanthanum, balance nickel and impurity elements. The article (20) is preferably substantially a single crystal or oriented polycrystal in a shape such as a gas turbine blade (22). <IMAGE>
IPC 1-7
IPC 8 full level
F01D 5/28 (2006.01); C22C 19/05 (2006.01); F01D 25/00 (2006.01); F02C 7/00 (2006.01)
CPC (source: EP US)
C22C 19/057 (2013.01 - EP US)
Citation (search report)
- [X] EP 0848071 A1 19980617 - UNITED TECHNOLOGIES CORP [US]
- [X] EP 0637476 A1 19950208 - HITACHI LTD [JP], et al
- [X] EP 0789087 A1 19970813 - HITACHI LTD [JP], et al
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1394278 A1 20040303; JP 2004162173 A 20040610; SG 108932 A1 20050228; US 2004042927 A1 20040304; US 2005139295 A1 20050630
DOCDB simple family (application)
EP 03255313 A 20030827; JP 2003301002 A 20030826; SG 200304874 A 20030825; US 22974102 A 20020827; US 81262804 A 20040329