The invention discloses a high-temperature
alloy forging material capable of being used for a large wheel disc of a 600-DEG C-grade high-temperature compressor, and belongs to the field of
alloy materials. The material comprises C, Mn, Si, S, P, Ni + Co, Cr, Nb + Ta, Ti, Al, B, Cu, N2, O2 and the balance Fe. By optimizing the
alloy components, the content of the easily segregated Nb element is about 3 wt%, and the manufacturing capacity of the large alloy cast
ingot is improved; the manufacturing cost is reduced, the forgeable capacity of the material is improved, the high-temperature performance of the material can be improved, and meanwhile the
linear expansion coefficient is controlled within an acceptable range. The room-temperature tensile properties are as follows: Rp0.2 is greater than or equal to 950MPa, Rm is greater than or equal to 1200MPa, A is greater than or equal to 13%, and Z is greater The tensile properties at 480 DEG C are as follows: Rp0.2 is greater than or equal to 855MPa, Rm is greater than or equal to 1065MPa, A is greater than or equal to 15%, and Z is greater than or And the durability is as follows: 650 DEG C, 690 MPa and more than or equal to 23 hours.