PROCEDE DE FABRICATION DE DISQUES DE TURBINE

• Main Author: JOHN A. MILLER ET ROY L. ATHEY
• Format: Patent
• Language: French
• Published: 20.06.1986
• Edition: 4
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; COMBINED OPERATIONS; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; FERROUS OR NON-FERROUS ALLOYS; FORGE FURNACES; FORGING; GAS-TURBINE PLANTS; HAMMERING; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINE TOOLS; MACHINES OR ENGINES FOR LIQUIDS; MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS; MECHANICAL ENGINEERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR; OTHER WORKING OF METAL; PERFORMING OPERATIONS; PRESSING METAL; PRODUCING MECHANICAL POWER; PUNCHING METAL; RIVETING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; UNIVERSAL MACHINE TOOLS; WEAPONS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS

LA PRESENTE INVENTION CONCERNE UN PROCEDE DE FABRICATION D'UN OBJET METALLIQUE AYANT DES PROPRIETES QUI VARIENT, D'UNE MANIERE CONTROLEE, D'UNE PORTION DE L'OBJET A UNE AUTRE PORTION DE CE MEME OBJET.CE PROCEDE EST CARACTERISE EN CE QU'IL COMPREND LES PHASES CONSISTANT A FORGER A CHAUD L'OBJET DANS SA TOTALITE POUR LUI DONNER UNE PREMIERE FORME GEOMETRIQUE QUI EST VOISINE DE LA FORME GEOMETRIQUE FINALE DESIREE SAUF DANS DES PORTIONS DE L'OBJET QUI SONTSURDIMENSIONNEES D'AU MOINS 25 ENVIRON COMPARATIVEMENT A LA FORME GEOMETRIQUE FINALE DESIREE; A TRAITER THERMIQUEMENT L'OBJET AFIN D'AUGMENTER LA DIMENSION DU GRAIN ET FORGER A TIEDE LES PORTIONS SURDIMENSIONNEES DE L'OBJET POUR LES AMENER A LA FORME FINALE DESIREE, DE TELLE FACON QUE LES PORTIONS FORGEES A TIEDE DE L'OBJET PRESENTENT DES PROPRIETES DE RESISTANCE A LA TRACTION ACCRUES TANDIS QUE LES PORTIONS FORGEES A CHAUD DE L'OBJET PRESENTENT DES PROPRIETES DE RESISTANCE AU FLUAGE AUGMENTEES. A method is described for producing metallic articles, especially turbine disks, which have a hot-worked structure in one region and a warmworked structure in another region and thereby have properties which differ in different regions. The method comprises an initial hot-working step, an intermediate heat treatment step and a final warm-working step.