The invention relates to a method for improving the surface quality of
nickel-based
alloy strip foil, and belongs to the technical field of high-temperature
alloy processing and preparation. Remelting electroslag ingots with set chemical components are obtained; the remelting electroslag
ingot is subjected to cogging
forging at the
heating temperature of 1150-1250 DEG C, the deformation is controlled to range from 30% to 70%, and a flat blank is obtained; the flat blank is subjected to hot rolling at the
heating temperature of 1150-1250 DEG C, the deformation is controlled to be 50%-90%, and a strip blank is obtained; and the strip blank is sequentially subjected to rough cold rolling, first surface coping, finish cold rolling, second surface coping and withdrawal and straightening, and the
nickel-based
alloy strip foil is obtained. The
nickel-based alloy foil with the high-quality surface is obtained by reducing defect sources layer by layer through high-temperature large-deformation
forge welding shrinkage, hot rolling recrystallization refining, cold rolling layering hardening depth control, SiC micro
cutting defect removal, finish rolling mirror surface
copying and annealing refining, micro crack removal through ultra-finishing and residual crack closing through tension withdrawal and straightening.