| 摘要 |
Gas turbine engine efficiencies are increased through improvements in nickel-base superalloys used to make parts and components for gas turbine engines. These improved superalloys consist essentially of, in percentages by weight, 5-10 Or, 5-10 Co, 0-2 Mo, 3-10W. 3-8 Ta, 0-2 Ti, 5-7 Al, 0-6 Re, 0-0.5 Hf; 0-0.07C, 0-0.015B and 0-0.075Y, the balance being Ni and incidental impurities. They produce single crystal articles having improvements in temperature capability, based on stress rupture strength and low and high cycle fatigue properties. Because of their superior resistance to degradation by cyclic oxidation, and their resistance to hot corrosion, the superalloys possess a unique balance in mechanical and environmental properties. |
