Hot working method of medical cobalt-based alloy

The invention discloses a hot working method of a medical cobalt-based alloy, and particularly relates to the technical field of medical materials, a cobalt-based alloy material is prepared from metal with the purity of 99.9%, surface turning treatment is carried out on a smelted and poured cast ingot to remove a pouring riser, so that solidification defects such as surface cold shut and inclusion are removed, and the cobalt-based alloy material with the purity of 99.9% is obtained. And the homogenizing treatment can effectively prevent component segregation in a cobalt-based alloy as-cast structure, graphite flakes can effectively prevent friction generated during thermal deformation from forming a barrel shape of an ingot, and a relatively complete recrystallization grain structure can be obtained within the range of controlling the deformation temperature to be 1140-1200 DEG C and the strain rate to be 0.02-0.1 s . During solid solution heat treatment, the blank is heated to 1180 DEG C at the heating