The isothermal constant strain rate compression tests were carried out to understand the high temperature deformation rheological behavior and microstructure of GCr15

and the flow stress equation and dynamic recrystallization equation of GCr15 was established.Influences of different hot forging condition on microstructure and forming quality of GCr15 bearing ferrule were analyzed based on DEFORM-3 Dsoftware.The simulated results show that the internal microstructure of the forging bearing ring ferrule is recrystallized under a certain deformation conditions

so that the average grain size is decreased with the increase of the deformation rate

and increased with the increase of the deformation temperature

while it is decreased with the increase of the deformation speed.The damage value of the ring surface is increased with the increase of the friction factor.Through increasing the preheating temperature of the mold

the punch force can be reduced

however

it has some influence on the dynamic recrystallization of the outer surface of the bearing ring.