Medium-entropy high-temperature alloy with excellent high-temperature strength as well as preparation method and application of medium-entropy high-temperature alloy

The invention discloses a medium-entropy high-temperature alloy with excellent high-temperature strength and a preparation method and application thereof, and particularly relates to the technical field of metallurgy. The alloy comprises the following components in percentage by weight: 27.0% to 30.5% of Co, 25.0% to 28% of Cr, 1.0% to 3.5% of Al, 1.0% to 4.0% of Ti, 0.5% to 2.2% of Ta, 1.2% to 3.4% of W, 2.0% to 4.0% of Mo, 1.0% to 2.5% of Nb, 0% to 0.085% of C and the balance of Ni and inevitable impurities. The alloy has the advantages of excellent high-temperature strength, long service life and the like, is easy to process and form, is easy to weld and the like, and can meet the use requirements of aero-engines and gas turbine hot end parts. 本发明公开了一种高温强度优异的中熵高温合金及其制备方法与应用，具体涉及冶金技术领域。所述合金包括：Co：27.0～30.5％，Cr：25.0～28％，Al：1.0～3.5％，Ti：1.0～4.0％，Ta：0.5～2.2％，W：1.2～3.4％，Mo：2.0～4.0％，Nb：1.0～2.5％，C：0～0.085％，余量Ni及不可避免的杂质。本发明的合金具有优异的高温强度和持久寿命等性能，同时具有易加工成型和易焊接等优点，能够满足航空发动机和燃气轮机热端部件的使用需求。