| 摘要 |
A nickel-base alloy having the following composition (in atomic percent unless otherwise stated): between 12 and 15 % of elements from the group consisting of Al, Ti, Ta and Nb, between 12.5% and 17.5% Cr, between 22 and 29 % Co, between 0 and 1.5 % W, between 0 and 3 % Mo, between 0.1 and 0.3 % C, between 0.05 and 0.2 % B, between 0.02 and 0.07 % Zr and, optionally, up to 2 % Fe, up to 1 % Mn, up to 1% Si, and up to 0.05 Mg; the balance being Ni and incidental impurities. The alloy has an improved combination of properties (principally improved resistance to high temperature deformation and surface environmental damage) compared with known alloys, and is intended to operate for prolonged periods of time above 700°C, and up to peak temperatures of 800°C. |
