Manufacturing method of GH864 alloy phi1300mm-grade smoke machine disc forge piece

The invention provides a manufacturing method of a GH864 alloy phi1300mm-grade flue gas machine disc forge piece, which comprises the following steps of: S1, designing a theoretical forge piece blank according to the appearance and the size of a GH864 high-temperature alloy phi1300mm-grade flue gas machine disc part in combination with the characteristics of a GH864 material; s2, a final forging die structure of the GH864 high-temperature alloy flue gas turbine disc with the phi being 1300 mm grade is optimally designed; s3, the shape of a preformed blank with an annular groove structure is designed according to the forging blank drawing and the finish forging die; s3.1, the upper end face and the lower end face of the prefabricated blank are in groove design, and die forging core deformation is increased in cooperation with upper and lower hub grooves of a finish forging die; and S3.2, an annular boss is designed on the finish forging die, a positioning groove matched with the annular boss of the finish forg