Description of GH4145 alloy characteristics and application fields: the alloy is mainly based on gamma '[Ni3 (Al, Ti, Nb)] in the ageing strengthening, nickel-based superalloy under 980 ℃ has good corrosion and oxidation resistance, under 800 ℃ has high strength, good relaxation resistance under 540 ℃, and at the same time also has good formability and weldability, the alloy is mainly used in the manufacture of engine work under 800 ℃ and the corrosion resistance of high strength required in the annular parts, structure, and bolt parts, such as work under 540 ℃ with medium or low stress relaxation and demanded that the resistance to the plane of the spring and spring.Can also be used in the manufacture of gas turbine blade and other parts.