Claims

1. A repaired turbine component of a gas turbine, the turbine component being formed of a nickel-base superalloy having a composition and gamma-prime content that causes the turbine component to crack if subjected to gas tungsten arc welding, the turbine component having a repaired region with a wear-resistant repair material diffusion bonded thereto, the wear-resistant repair material consisting of a cobalt-base braze alloy dispersed in a matrix material of a wear-resistant cobalt-base alloy.

2. The repaired turbine component according to claim 1, wherein the gamma-prime content of the nickel-base superalloy is about 55 to 59 volume percent.

3. The repaired turbine component according to claim 1, wherein the wear-resistant repair material has a nominal composition consisting of, by weight, about 18.5% chromium, about 0.92% nickel, about 0.64% tungsten, about 0.34% tantalum, about 0.23% boron, about 0.12% carbon, about 0.021% titanium about 26.5% molybdenum about 3.2% silicon, and the balance cobalt and incidental impurities.

4. The repaired turbine component according to claim 1, wherein the wear-resistant repair material has a nominal composition consisting of, by weight, about 27.6% chromium, about 5.5% nickel, about 18.9% tungsten, about 0.366% tantalum, about 0.24% boron, about 0.87% carbon, about 0.023% titanium, about 2.7% iron, about 0.91% vanadium, and the balance cobalt and incidental impurities.

5. The repaired turbine component according to claim 1, wherein the nickel-base superalloy consists of, by weight about 9.5 to about 10 chromium, about 7 to about 8 cobalt, about 3.35 to about 3.65 titanium, about 4.1 to about 4.3 aluminum, about 5.75 to about 6.25 tungsten, about 1.30 to about 1.70 molybdenum, about 4.60 to about 5.0 tantalum, about 0.06 to about 0.1 carbon, about 0.0080 to about 0.010 zirconium, about 0.008 to about 0.0105 boron, and the balance being nickel and incidental impurities.