NICKEL DIFFUSION BRAZE ALLOY AND METHOD FOR REPAIR OF SUPERALLOYS
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United States of America Patent
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app pub date -
Dec 15, 2000
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Dec 15, 2000
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Abstract
A braze alloy powder mixture that includes a low-melt powder composition and a high-melt powder composition. The low-melt powder composition is made of one or more low-melt powders and includes 50-70% Ni, 8-20% Cr, 8-15% Ta, 4-10% Co, 2-7% Al, and up to 2.25% B. The high-melt powder composition is made of one or more high-melt powders and includes 50-70% Ni, 2-10% Cr, 2-10% Ta, 5-15% Co, 2-10% Al, 2-10% W, and up to about 3% each of Re, Mo and Hf. Up to about 1% Ti, W, Mo, Re, Nb, Hf, Pd, Pt, Ir, Ru, C, Si, and/or Zr may be included in the low-melt powder, while the high-melt powder may include up to about 1% each of Ti, Nb, C, B, Si, and Zr.
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