Activated diffusion brazing alloys and repair process
AssigneeHoneywell International Inc.
InventorYiping Hu
Life of this patent
Estimating the term…
Abstract
The present invention provides a low-melt nickel-based alloy powder applied in an activated diffusion brazing repair on gas turbine components. In one embodiment, and by way of example only, the low-melt alloy powder comprises between about 6.7% and about 9.2% by weight Cr, between about 9.7% and about 10.3% by weight Co, between about 3.7% and about 4.7% by weight W, between about 3.3% and about 6.3% by weight Ta, between about 3.6% and about 5.2% by weight Al, between about 1.3% and about 4.0% by weight Hf, between about 0.02% and about 0.06% by weight C, between about 1.0% and about 3.2% by weight B, and Ni. Optionally, the low-melt alloy powder may include between about 1.4% and about 3.2% by weight Re.
Claims21
A low-melt nickel-based alloy powder for use in a braze alloy composition, the nickel-base alloy powder comprising:
- between about 6.7% and about 9.2% by weight Cr;
- between about 9.7% and about 10.3% by weight Co;
- between about 3.7% and about 4.7% by weight W;
- between about 3.3% and about 6.3% by weight Ta;
- between about 3.6% and about 5.2% by weight Al;
- between about 1.3% and about 4.0% by weight Hf;
- between about 0.02% and about 0.06% by weight C;
- between about 1.0% and about 3.2% by weight B;
- and
- Ni.
A braze alloy composition for repairing a component comprising a metal material, the braze alloy composition comprising:
- a high-melt alloy powder comprising the component base material;
- and
- a low-melt nickel-based alloy powder comprising:
- at least about 6.7% by weight Cr;
- between about 9.7% and about 10.3% by weight Co;
- between about 3.7% and about 4.7% by weight W;
- at least about 3.3% by weight Ta;
- at least about 3.6% by weight Al;
- at least about 1.3% by weight Hf;
- between about 0.02% and about 0.06% by weight C;
- at least about 1.0% by weight B;
- and
- Ni.
A method for repairing a component comprising a metal material having a worn area therein, the method comprising the step of:
- applying a brazing alloy mixture to the worn area of the component, the brazing alloy mixture including a high-melt alloy powder comprising the component base material, and a low-melt nickel-base alloy powder comprising at least about 6.7% by weight Cr, between about 9.7% and about 10.3% by weight Co, between about 3.7% and about 4.7% by weight W, at least about 3.3% by weight Ta, at least about 3.6% by weight Al, at least about 1.3% by weight Hf, between about 0.02% and about 0.06% by weight C, at least about 1.0% by weight B, and Ni.
Dependencies are inferred from the claim text.