Method for production of a compound gas turbine blade consisting of a foot, blade and head piece, whereby the blade is made from a dispersion hardened nickel based super-alloy; and compound blade produced using this method

摘要

a composite gasturbinenschaufel consists of a schaufelblatt (1) from a oxyddispersionsgehu00e4rteten record - u00adsuperlegierung in condition of lu00e4ngsgerichteten coarse stengelu00adkristallen and a cover plate (6). a deckband and a fussstu00fcck (7), the latter from a nichtdispersionsgehu00e4ru00adteten record - number (cast alloys).the gasturu00adbinenschaufel is prepared by the recesses (4) and / or surveys (5)) or (2) or fussu00adende (3) of the schaufelblattes (1) after preheating of the latter at a temperature of 50 to 300 degrees below the solidusu00adtemperatur the tiefstschmelzenden phase of the schaufelblattu00adwerkstoffs with that nichtdispersionsgehu00e4rteten superleu00adgierung a orumgossen. the bottom is less than 100 degrees above the liquidus temperature of the hu00f6chstu00adschmelzenden phase in this alloy. it's all anschmelzen of schaufelblattes (1) and to avoid any metallurgical bonding. vorteilhafterweise between schaufelu00adblatt (1) and cover plate (6).fussstu00fcck (7) for a wu00e4rmeu00addu00e4mmende, mechanically restraining layer (16) an oxide of at least one of the elements cr, al, si, ti, zr of 5 to 200 microns in thickness is provided.