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US 10,076,811 B2Granted
Structural braze repair of superalloy component
AssigneeSiemens Energy, Inc.
InventorKazim Ozbaysal
Life of this patent
Estimating the term…
Abstract
Boron and silicon free braze alloys useful for structural repairs of superalloy gas turbine engine components. The braze alloy composition may contain only elements that are contained in the superalloy material to be repaired, and may have melting temperature ranges as low as 10° C. to facilitate producing a high strength homogenized braze joint during a solution heat treatment of the superalloy substrate material.
Claims11
A method comprising:
- applying a boron and silicon free braze alloy to a superalloy substrate, the braze alloy consisting only of elemental constituents that are present in the superalloy substrate, the braze alloy composition containing an effective quantity of titanium as a melting point depressant so that the braze alloy composition has a melting temperature range of no more than 50° C. and inclusive of or below a solution heat treating temperature of the superalloy substrate;
- and
- performing a solution heat treatment of the superalloy substrate effective to melt the braze alloy and to fuse and homogenize a braze joint,
- applying the braze alloy composition consisting of:
- Cr 12-16 wt. %;
- Ti 13-16 wt. %;
- Al 0-2.5 wt. %;
- Co 2-4 wt. %;
- W 3-5 wt. %;
- Mo 0-2 wt. %;
- Ta 0-2 wt. %;
- balance Ni,
- wherein the braze alloy composition is free of hafnium.
10 more elements
A method comprising:
- applying a boron and silicon free braze alloy to a superalloy substrate, the
- braze alloy consisting only of elemental constituents that are present in the superalloy substrate, the braze alloy composition containing an effective quantity of titanium as a melting point depressant so that the braze alloy composition has a melting temperature range of no more than 50° C. and inclusive of or below a solution heat treating temperature of the superalloy substrate;
- and
- performing a solution heat treatment of the superalloy substrate effective to melt the braze alloy and to fuse and homogenize a braze joint,
- applying the braze alloy composition consisting of:
- Cr 15-18 wt. %;
- Ti 10-15 wt. %;
- Al 0-2.5 wt. %;
- Co 2-4 wt. %;
- W 3-5 wt. %;
- Mo 0-2 wt. %;
- Ta 0-2 wt. %;
- balance Ni.
10 more elements
A method comprising:
- applying a boron and silicon free braze alloy to a superalloy substrate, the braze alloy consisting only of elemental constituents that are present in the superalloy substrate, the braze alloy composition containing an effective quantity of titanium as a melting point depressant so that the braze alloy composition has a melting temperature range of no more than 50° C. and inclusive of or below a solution heat treating temperature of the superalloy substrate;
- and
- performing a solution heat treatment of the superalloy substrate effective to melt the braze alloy and to fuse and homogenize a braze joint
- applying the braze alloy composition consisting of:
- Cr 15-19 wt. %;
- Ti 8-10 wt. %;
- Al 0-2.5 wt. %;
- Co 14-18 wt. %;
- Mo 12-16 wt. %;
- balance Ni.
7 more elements
A method comprising:
- removing a superalloy gas turbine component from service;
- applying a boron and silicon free braze alloy to a discontinuity on a surface of the component, the braze alloy consisting only of elemental constituents that are present in the component, the braze alloy containing an effective quantity of titanium as a melting point depressant so that the braze alloy composition has a melting temperature range of no more than 20° C.;
- and
- heat treating the component with a temperature regiment effective to melt the braze alloy and to fuse and to homogenize a braze joint to repair the discontinuity,
- applying the braze alloy composition consisting of:
- Cr 15-18 wt. %;
- Ti 10-16 wt. %;
- Al 0-2.5 wt. %;
- Co 2-4 wt. %;
- W 3-5 wt. %;
- Mo 0-2 wt. %;
- Ta 0-2 wt. %;
- balance Ni,
- wherein the braze alloy composition is free of hafnium.
11 more elements
Dependencies are inferred from the claim text.