EP 2295612 A1 20110316 - Method of controlling and refining final grain size in supersolvus heat treated nickel-base superalloys
Title (en)
Method of controlling and refining final grain size in supersolvus heat treated nickel-base superalloys
Title (de)
Verfahren zur Steuerung der Endkorngröße bei supersolvuswärmebehandelten Legierungen auf Nickelbasis
Title (fr)
Procédé de contrôle et d'affinement de la grosseur de grain finale dans des superalliages à base de nickel traité par traitement thermique intermédiaire
Publication
Application
Priority
US 49489609 A 20090630
Abstract (en)
A gamma prime precipitation-strengthened nickel-base superalloy and method of forging an article (10) from the superalloy to promote a low cycle fatigue resistance and high temperature dwell behavior of the article (10). The superalloy has a composition of, by weight, 16.0-22.4% cobalt, 6.6-14.3% chromium, 2.6-4.8% aluminum, 2.4-4.6% titanium, 1.4-3.5% tantalum, 0.9-3.0% niobium, 1.9-4.0% tungsten, 1.9-3.9% molybdenum, 0.0-2.5% rhenium, greater than 0.05% carbon, at least 0.1% hafnium, 0.02-0.10% boron, 0.03-0.10% zirconium, the balance nickel and incidental impurities. A billet is formed of the superalloy and worked at a temperature below the gamma prime solvus temperature of the superalloy so as to form a worked article (10), which is then heat treated above the gamma prime solvus temperature of the superalloy to uniformly coarsen the grains of the article (10), after which the article (10) is cooled to reprecipitate gamma prime. The article (10) has an average grain size of not coarser than ASTM 7 and is substantially free of critical grain growth.
IPC 8 full level
C22C 19/05 (2006.01); C22F 1/10 (2006.01); F01D 5/02 (2006.01)
CPC (source: EP US)
C22C 19/03 (2013.01 - EP US); C22C 19/056 (2013.01 - EP US); C22C 19/057 (2013.01 - EP US); C22F 1/10 (2013.01 - EP US); F05B 2230/21 (2013.01 - EP US)
Citation (applicant)
- US 4957567 A 19900918 - KRUEGER DANIEL D [US], et al
- US 6521175 B1 20030218 - MOURER DAVID P [US], et al
- EP 1195446 A1 20020410 - GEN ELECTRIC [US]
- US 5529643 A 19960625 - YOON DUK Y [US], et al
- US 5584947 A 19961217 - RAYMOND EDWARD L [US], et al
Citation (search report)
- [XY] EP 1847627 A2 20071024 - GEN ELECTRIC [US]
- [Y] US 5584947 A 19961217 - RAYMOND EDWARD L [US], et al
- [Y] US 6521175 B1 20030218 - MOURER DAVID P [US], et al
- [Y] US 4957567 A 19900918 - KRUEGER DANIEL D [US], et al
- [Y] US 5529643 A 19960625 - YOON DUK Y [US], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
BA ME RS
DOCDB simple family (publication)
US 2010329883 A1 20101230; CA 2707782 A1 20101230; CN 101935780 A 20110105; EP 2295612 A1 20110316; JP 2011012346 A 20110120
DOCDB simple family (application)
US 49489609 A 20090630; CA 2707782 A 20100617; CN 201010226982 A 20100630; EP 10167751 A 20100629; JP 2010144348 A 20100625