EP 0683239 B1 19990120 - Oxidation resistant nickel based super alloy
Title (en)
Oxidation resistant nickel based super alloy
Title (de)
Oxidationsbeständige Superlegierung auf Nickelbasis
Title (fr)
Superalliage à base de nickel résistant à l'oxydation
Publication
Application
Priority
- EP 94303644 A 19940520
- JP 12211394 A 19940603
Abstract (en)
[origin: EP0683239A1] A nickel superalloy is disclosed having superior resistance to oxidation under conditions such as those encountered in jet engines. The superalloy comprises 0.25 to 0.40 weight percent zirconium, 0.004 to 0.010 weight percent boron, 5.0 to 8.0 weight percent aluminum, 5.0-12.0 weight percent chromium, 0.75-2.0 weight percent hafnium, 0-10.0 weight percent cobolt, 0-12 weight percent tungsten, 0-12 weight percent molybdenum, 0-12 weight percent tantalum, 0-12 weight percent titanium, 0-2 weight percent niobium, 0.06-0.20 weight percent carbon and the balance nickel and inevitable impurities. Under burner rig oxidation conditions, this alloy can form a zirconium stabilized alumina barrier layer which greatly reduces the oxidation rate of the alloy. A method of making the superalloy and a method for casting the engine components made of the superalloy are also disclosed. <IMAGE>
IPC 1-7
IPC 8 full level
B22C 9/04 (2006.01); C22C 1/02 (2006.01); C22C 19/03 (2006.01); C22C 19/05 (2006.01)
CPC (source: EP)
C22C 19/056 (2013.01); C22C 19/057 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0683239 A1 19951122; EP 0683239 B1 19990120; JP 3474634 B2 20031208; JP H07331365 A 19951219
DOCDB simple family (application)
EP 94303644 A 19940520; JP 12211394 A 19940603