Nickel-base superalloy compositions
AssigneeAvco Corporation
InventorsCharles Berger, Michael Iovene
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Abstract
Nickel-base superalloy composition for the repair, coating or rebuilding of the surface of a superalloy substrate, such as a single crystal nickel-base superalloy, to impart thereto surface areas having improved high temperature properties such as hot corrosion resistance. The present compositions are applied by low heat-input welding processes, such as laser welding or plasma arc welding, and are formulated to provide hot corrosion resistance properties and yet to have good weldability properties. The composition contains, by weight percentages, 2-12.5 Cr, 6-17 Cr, 0.5-7 Mo, 0.5-4 Ta, 2.5-9.5 Al, 1-4 Re, 1.5-8.5 W, 0.01-2.5 Nb, 0.5-6 Ti, 0.01-0.7 Yt, 0.02-3.5 Hf, and balance Ni.
Claims4
A nickel base superalloy powder composition suitable for application to a superalloy substrate to produce surface areas thereon having high temperature creep strength and hot corrosion resistance, said composition consisting essentially of the following ingredients and weight percentages:
- ______________________________________ Cobalt 3.0-7.5 Chromium 6.0-10.0 Molybdenum 0.5-4.0 Tantalum 0.5-2.5 Aluminum 3.0-6.0 Rhenium 2.5-3.5 Tungsten 1.6-2.5 Niobium 1.0-2.0 Titanium 0.8-2.5 Ytterbium 0.01-0.7 Hafnium 0.5-2.0 Boron 0-0.04 Carbon 0-0.003 Zirconium 0-0.0015 Silicon 0-0.3 Nickel balance ______________________________________
Dependencies are inferred from the claim text.