초록 ▼

An improved cobalt-base braze alloy composition is provided for use in repairing superalloy articles, such as gas turbine engines, power generation turbines, refinery equipment, and heat exchangers. The improved cobalt-base braze alloy composition includes nickel; at least one element selected from

An improved cobalt-base braze alloy composition is provided for use in repairing superalloy articles, such as gas turbine engines, power generation turbines, refinery equipment, and heat exchangers. The improved cobalt-base braze alloy composition includes nickel; at least one element selected from the group of rhenium, palladium, platinum, ruthenium, and iridium; at least one element selected from the group of boron and silicon; and the remaining balance consists of cobalt. This composition may also include aluminum and/or one or more rare earth/lanthanide series elements, and the composition may be combined with one or more powdered base metal superalloy compositions to form an improved diffusion braze alloy mixture. The compositions according to the present invention enable a repair composite formed of such compositions to at least equal the mechanical, environmental, and processing properties of the superalloy base metal being repaired.

대표청구항 ▼

1. A cobalt-base alloy composition, consisting essentially of, in percent by weight:Nickel from about 0.001% to less than the weight percent of cobalt; at least one element selected from the group consisting of: Iridium up to about 12%, Ruthenium up to about 12%; at least one element selected from t

1. A cobalt-base alloy composition, consisting essentially of, in percent by weight:Nickel from about 0.001% to less than the weight percent of cobalt; at least one element selected from the group consisting of: Iridium up to about 12%, Ruthenium up to about 12%; at least one element selected from the group consisting of: Silicon from about 4% to about 6%; Boron from about 0.5% to about 2.5%; at least one element selected from the group consisting of: Chromium up to about 40%, Aluminum up to about 12%, Titanium up to about 6%, Tungsten up to about 15%, Molybdenium up to about 15%, Niobium up to about 12%, Rhenium up to about 15%, Hafnium up to about 6%, Tantalum up to about 15%, Palladium up to about 40%, Platinum up to about 40%, Iron up to about 3%, Manganese up to about 1%, Rare earth/Lanthanide elements up to about 5%, Carbon up to about 2%, Zirconium up to about 2%; and the balance cobalt.