| 摘要 |
A nickel based alloy suitable for casting into a single crystal structure and for use in making gas turbine components, such as rotating blades, is provided. A first series of alloy compositions in accordance with the present invention comprises the following range of elements, in weight percent: aluminum 3.4 to 4.0, titanium 3.0 to 4.7, tantalum 0.8 to 2.0, chromium 13.75 to 15.5, cobalt 8.0 to 8.5, niobium up to 1.0, tungsten 2.0 to 4.5, molybdenum 0.1 to 2.0, and the balance nickel. A second series of alloy compositions in accordance with the present invention comprises the following range of elements, in weight percent: aluminum 4.7 to 5.3, titanium 1.8 to 3.0, chromium 15.2 to 16.3, cobalt 6.4 to 8.75, niobium 0.75 to 4.0, and the balance nickel. A further alloy composition in accordance with the present invention comprises the following elements, in weight percent: aluminum 4.24, titanium 2.8, chromium 15.3, cobalt 4.6, niobium 3.0, tungsten 4.05, molybdenum 0.15, and the balance nickel. <IMAGE> |
