The hot compression of as-cast alloy Ni68Cu28Al is simulated by Gleeble 3500 thermal simulator at defonnation temperature 1 000 ~ 1 150 °C with strain rate of 0.01 ~ 10 s

-1

. The flow stress curves of alloy at different conditions are analyzed

the constitutive equation describing the high temperature compression deformation of alloy is established

the constitutive equation is applied to the finite element analysis software DEFORM 3D

and the hot compression process of the alloy is numerically simulated to analyze the changes of strain rate field

strain field and temperature field inside the workpiece. The results show that the hardening effect of as-cast Ni68Cu28Al alloy is very strong during deformation

and the softening effect caused by dynamic recovery and dynamic recrystallization is not obvious

the alloy does n

ot recrystallize completely during deformation

the hot compression process of the alloy has obvious non-uniformity of deformation. Comprehensively considering

the best processing temperature of as-cast Ni68Cu28Al alloy is controlled at 1 000 - 1 100 °C

and the strain rate is about 0. 01 s

-1

.