초록 ▼

A protective tip (5) for a titanium steam-turbine blade (1), comprises 28% to 40% TiC, 12% to 26% Cr+Co, 1% to 6% Mo, 3% to 8% Ni 0.3% to 1.5% Cu and a balance of Fe. The tip (5) is brazed to the blade (1) by interposing a copper-based strip (6) having a thickness lying between 7/100 mm and 15/100 m

A protective tip (5) for a titanium steam-turbine blade (1), comprises 28% to 40% TiC, 12% to 26% Cr+Co, 1% to 6% Mo, 3% to 8% Ni 0.3% to 1.5% Cu and a balance of Fe. The tip (5) is brazed to the blade (1) by interposing a copper-based strip (6) having a thickness lying between 7/100 mm and 15/100 mm therebetween, then raising the temperature of the blade (1) and its tip (5) to between 900°C. and 950°C. in a vacuum or inert atmosphere oven. This temperature is maintained for a period of between thirty minutes and seventy-five minutes, and the oven is allowed to cool to ambient temperature. Optimal brazing also serves to harden the tip (5) possesses very good resistance to abrasion by water droplets.

대표청구항

A protective tip for a titanium turbine blade, said tip comprising the following constituents: TiC: 28% to 40% Cr+Co: 12% to 26% Mo: 1% to 6% Ni: 3% to 8% Cu: 0.3% to 1.5% Fe: balance

A protective tip for a titanium turbine blade, said tip comprising the following constituents: TiC: 28% to 40% Cr+Co: 12% to 26% Mo: 1% to 6% Ni: 3% to 8% Cu: 0.3% to 1.5% Fe: balance