EP 0196447 B1 19890809 - PROCESS FOR ENHANCING THE OXIDATION AND CORROSION RESISTANCE OF A COMPONENT MADE FROM A DISPERSION-HARDENED SUPERALLOY BY MEANS OF A SURFACE TREATMENT
Title (en)
PROCESS FOR ENHANCING THE OXIDATION AND CORROSION RESISTANCE OF A COMPONENT MADE FROM A DISPERSION-HARDENED SUPERALLOY BY MEANS OF A SURFACE TREATMENT
Publication
Application
Priority
CH 116685 A 19850315
Abstract (en)
1. A process for increasing the oxidation resistance and corrosion resistance of a component made of a dispersion strengthened superalloy by a surface treatment, characterised in that, regardless of the structural state of the starting material, the component is subjected to a surface treatment by coldworking, the degree of cold deformation in the surface zone (3, 5) being chosen so that, in the subsequent heat treatment, the available motive force leads to a fine-grained structure while the core zone (4) is forced to form coarse grains, and in that the component is subjected to recrystallization annealing in a temperature range above the recrystallization and below the solidus temperature.
IPC 1-7
IPC 8 full level
C22F 1/00 (2006.01); C22F 1/10 (2006.01); C22F 3/00 (2006.01)
CPC (source: EP US)
C22F 1/00 (2013.01 - EP US); C22F 1/10 (2013.01 - EP US); C22F 3/00 (2013.01 - EP US); Y10S 148/903 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 0196447 A1 19861008; EP 0196447 B1 19890809; DE 3664930 D1 19890914; JP S61213360 A 19860922; US 4909859 A 19900320
DOCDB simple family (application)
EP 86102345 A 19860224; DE 3664930 T 19860224; JP 5604286 A 19860313; US 83289986 A 19860226