Activated diffusion brazing alloys and repair process
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.
1. 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 2.3% and about 3.2% by weight B; and
a balance of Ni.
2. The low-melt nickel-based alloy powder of claim 1 , further comprising:
between about 1.4% and about 3.2% by weight Re.
3. The low-melt nickel-base alloy powder of claim 2 , further comprising:
between about 6.7% and about 7.3% by weight Cr;
between about 5.7% and about 6.3% by weight Ta; and
between about 4.8% and about 5.2% by weight Al.
4. The low-melt nickel-based alloy powder of claim 1 , further comprising:
between about 8.7% and about 9.2% by weight Cr;
between about 3.3% and about 3.7% by weight Ta; and
between about 3.6% and about 4.0% by weight Al.
5. 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 7.3% by weight Cr;
between about 9.7% and about 10.3% by weight Co;
between about 3.7% and about 4.2% by weight W;
between about 5.7% and about 6.3% by weight Ta;
between about 4.8% and about 5.2% by weight Al;
between about 1.3% and about 1.7% by weight Hf,
between about 0.02% and about 0.06% by weight C;
between about 2.8% and about 3.2% by weight B; and
a balance of Ni.
6. The low-melt nickel-based alloy powder of claim 5 , further comprising:
between about 2.8% and about 3.2% by weight Re.
7. The low-melt nickel-based alloy powder of claim 5 , further comprising:
about 7.0% by weight Cr;
about 10.0% by weight Co;
about 4.0% by weight W;
about 6.0% by weight Ta;
about 5.0% by weight Al;
about 1.5% by weight Hf,
about 0.04% by weight C;
about 3.0% by weight B; and
a balance of Ni.
8. The low-melt nickel-based alloy powder of claim 7 , further comprising:
about 3.0% by weight Re.
9. A low-melt nickel-based alloy powder for use in a braze alloy composition, the nickel-base alloy powder comprising:
between about 8.7% and about 9.2% by weight Cr;
between about 9.7% and about 10.3% by weight Co;
between about 3.7% and about 4.2% by weight W;
between about 3.3% and about 3.7% by weight Ta;
between about 3.6% and about 4.0% by weight Al;
between about 1.3% and about 1.7% by weight Hf;
between about 0.02% and about 0.06% by weight C;
between about 2.3% and about 2.7% by weight B; and
a balance of Ni.
10. The low-melt nickel-based alloy powder of claim 9 , further comprising:
about 9.0% by weight Cr;
about 10.0% by weight Co;
about 4.0% by weight W;
about 3.5% by weight Ta;
about 3.8% by weight Al;
about 1.5% by weight Hf;
about 0.04% by weight C;
about 2.5% by weight B; and
a balance of Ni.