EP 1176222 A2 20020130 - Heat treatment of nickel-base superalloy die inserts
Title (en)
Heat treatment of nickel-base superalloy die inserts
Title (de)
Wärmebehandlung von Matrizeeinsätzen bestehend aus Superlegierungen auf Nickel-Basis
Title (fr)
Traitement thermique d'un insert de matrice en supperalliages à base de Ni
Publication
Application
Priority
- US 21560100 P 20000630
- US 82512801 A 20010403
Abstract (en)
A rigid die insert for forming and shaping a working material comprises a nickel-base superalloy, preferably Rene 95. A plurality of gamma prime particles are uniformly distributed throughout the rigid die insert, which has a Rockwell hardness Rc of between about 48 and about 52. The invention also includes a method of treating a rigid die insert comprising a nickel-base superalloy to reduce crack propagation and raise yield stress. The method comprises the steps of: providing the rigid die insert; dissolving larger gamma-prime particles in the rigid die insert; and growing additional gamma-prime particles of smaller particle size in the rigid die insert, whereby the particle size of each of the plurality of gamma-prime particles is refined, thereby reducing crack propagation and raising the yield stress of the rigid die insert. A method of refining the particle size of gamma-prime particles in a Rene 95 superalloy is also disclosed.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1176222 A2 20020130; EP 1176222 A3 20020306; CA 2351153 A1 20011230; US 2002139458 A1 20021003
DOCDB simple family (application)
EP 01305605 A 20010627; CA 2351153 A 20010621; US 82512801 A 20010403