METHOD FOR POST-WELD HEAT TREATMENT OF WELDED COMPONENTS MADE OF GAMMA PRIME STRENGTHENED SUPERALLOYS

The invention relates to a method of post-weld heat treatment of a without a filler material electron beam or laser welded high strength component made of a gamma prime (.gamma.') strengthened superalloy based on Ni or Co or Fe or combinations thereof. The method consists of the following steps...

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Bibliographische Detailangaben
Hauptverfasser:	BECKEL, DANIEL, AMBROSY, GUENTER, ETTER, THOMAS, OPDERBECKE, THOMAS
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING COMBINED OPERATIONS CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ENGINE PLANTS IN GENERAL FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS HEATING LIGHTING MACHINE TOOLS MACHINES OR ENGINES IN GENERAL MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES OTHER WORKING OF METAL PERFORMING OPERATIONS SOLDERING OR UNSOLDERING STEAM ENGINES TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS UNIVERSAL MACHINE TOOLS WEAPONS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	The invention relates to a method of post-weld heat treatment of a without a filler material electron beam or laser welded high strength component made of a gamma prime (.gamma.') strengthened superalloy based on Ni or Co or Fe or combinations thereof. The method consists of the following steps a) providing the welded component, then b) heating the welded component by applying a rapid heating-up rate in the range of about 20 to 40°C/min during the entire temperature range from RT up to a temperature T1 of at least 1000°C, then c) holding the welded component at T1 and then heating the component by applying a slow heating-up rate of about 5°C/min to a final temperature T f, then d) holding the welded component at T f for a time t f, wherein isothermal dwell time t f is sufficient for at least partially dissolving the gamma prime phase in the weld and also in the base material surrounding the weld; then e) cooling the component with a cooling rate of about 20°C/min and f) finally optionally applying a precipitation hardening treatment according to the known state of the art