Nickel based superalloy having a very high resistance to hot corrosion for single crystal turbine blades of industrial turbines

A nickel based superalloy, suitable for monocrystalline solidification, comprises (wt.%): (a) 4.75-5.25 cobalt; (b) 15.5-16.5 chromium; (c) 0.8-1.2 molybdenum; (d) 3.75-4.25 tungsten; (e) 3.75-4.25 aluminum; (f) 1.75-2.25 titanium; (g) 4.75-5.25 tantalum; (h) 0.006-0.04 carbon; (i) ≤ 0.01 boron; (j)...

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Bibliographische Detailangaben
Hauptverfasser:	MALCOLM MCCOLVIN, GORDON, BLACKLER, MICHAEL, WAHI, RAJESHWAR PRASAD, CARON, PIERRE, LELAIT, LAURENT, ESCALE, ANDRE MARCEL
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS BLASTING CHEMISTRY ENGINE PLANTS IN GENERAL FERROUS OR NON-FERROUS ALLOYS HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES TREATMENT OF ALLOYS OR NON-FERROUS METALS WEAPONS
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Beschreibung
Zusammenfassung:	A nickel based superalloy, suitable for monocrystalline solidification, comprises (wt.%): (a) 4.75-5.25 cobalt; (b) 15.5-16.5 chromium; (c) 0.8-1.2 molybdenum; (d) 3.75-4.25 tungsten; (e) 3.75-4.25 aluminum; (f) 1.75-2.25 titanium; (g) 4.75-5.25 tantalum; (h) 0.006-0.04 carbon; (i) ≤ 0.01 boron; (j) ≤ 0.01 zirconium; (k) ≤ 1 hafnium; (l) ≤ 1 niobium; and (m) remainder nickel and inevitable impurities. An Independent claim is also included for an industrial turbine blade produced by the monocrystalline solidification of the above superalloy. Superalliage à base de nickel, apte à la solidification monocristalline, ayant la composition pondérale suivante: Co, 4,75 à 5,25 %; Cr, 15,5 à 16,5 %; Mo, 0,8 à 1,2 %; W, 3,75 à 4,25 %; Al, 3,75 à 4,25 %; Ti, 1,75 à 2,25 %; Ta, 4,75 à 5,25 %; C, 0,006 à 0,04 %; B,