Method of applying braze materials to a substrate
First Claim
Patent Images
1. A method of applying braze materials to a substrate, said method comprising the steps ofobtaining a substrate requiring repair;
- generating a high velocity combustion gas stream;
passing binder-free high temperature brazing material into said gas stream to entrain and melt the brazing material therein;
directing the brazing material entrained gas stream against and along at least one portion of the substrate requiring repair to form a deposit of brazing material thereon; and
thereafter heat treating the substrate to bring the brazing material to a brazing temperature and then lowering the temperature.
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Accused Products
Abstract
A HVOF process is used for applying brazing materials to repair surfaces of a substrate such as a turbine blade. The brazing material is applied in powdered form and is free of binders and adhesives. The brazing materials may be any one or more of a nickel based, cobalt based or ferrous based high temperature brazing material. Alloys of these elements may be used together with a temperature depressing melting point element such as boron or silicon.
48 Citations
16 Claims
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1. A method of applying braze materials to a substrate, said method comprising the steps of
obtaining a substrate requiring repair; -
generating a high velocity combustion gas stream;
passing binder-free high temperature brazing material into said gas stream to entrain and melt the brazing material therein;
directing the brazing material entrained gas stream against and along at least one portion of the substrate requiring repair to form a deposit of brazing material thereon; and
thereafter heat treating the substrate to bring the brazing material to a brazing temperature and then lowering the temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of repairing a turbine blade having at least one surface crack therein, said method comprising the steps of
generating a high velocity combustion gas stream; -
passing binder-free high temperature brazing material into said gas stream to entrain and melt the brazing material therein;
directing the brazing material entrained gas stream against and along the crack in the turbine blade to form a deposit of brazing material in the crack; and
thereafter heat treating the turbine blade to bring the brazing material to a brazing temperature and then lowering the temperature. - View Dependent Claims (15, 16)
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Specification