초록 ▼

A repaired nickel-based superalloy substrate that has applied thereon a nickel-based polycrystalline repair alloy comprising 0.03-2.5 weight % hafnium, 0.003-0.32% boron, 0.02-0.16% yttrium and 0.007-0.35% zirconium. The present invention further provides a repaired single crystal alloy substrate th

A repaired nickel-based superalloy substrate that has applied thereon a nickel-based polycrystalline repair alloy comprising 0.03-2.5 weight % hafnium, 0.003-0.32% boron, 0.02-0.16% yttrium and 0.007-0.35% zirconium. The present invention further provides a repaired single crystal alloy substrate that has applied thereon a repair alloy wherein the repair alloy's composition is similar to or the same as the single crystal alloy composition except that the repair alloy additionally comprises at least one grain boundary strengthener element and at least one element that enhances oxidation resistance.

대표청구항 ▼

[ We claim:] [1.] A repaired superalloy comprising a directionally solidified nickel based superalloy substrate having applied thereon a nickel-based repair alloy wherein said repair alloy comprises the following elements, in weight percent:______________________________________ chromium 6.0-10.0 al

[ We claim:] [1.] A repaired superalloy comprising a directionally solidified nickel based superalloy substrate having applied thereon a nickel-based repair alloy wherein said repair alloy comprises the following elements, in weight percent:______________________________________ chromium 6.0-10.0 aluminum 4.75-6.1 tungsten 6.0-12.5 tantalum 0-4.25 molybdenum 0-1.9 cobalt 9.25-13.0 titanium 0-2.25 niobium 0-1.25 rhenium 0-3.25 carbon 0.08-0.16 boron 0.003-0.020 zirconium 0.04-0.12 yttrium 0.02-0.16 hafnium 1.0-2.5 nickel remainder. ______________________________________ [4.] A repaired nickel-based superalloy comprising a nickel-based single crystal superalloy substrate and having applied thereon a nickel-based repair alloy;wherein said repair alloy comprises the following elements, in weight percent:______________________________________ chromium 4.75-10.5 aluminum 4.75-5.8 tungsten 3.75-6.2 molybdenum 0-2.1 cobalt 4.5-10.5 titanium 0-1.75 rhenium 0-3.2 tantalum 8.4-12.25 carbon 0.05-0.17 boron 0.003-0.320 zirconium 0.007-0.15 yttrium 0.02-0.16 hafnium 0.03-1.9 nickel remainder. ______________________________________