The hot-deformation behaviours of HGH3126 Ni-based alloy (/% ： W0.005C

17. 20Cr

4. 21W

16.25Mo

5. 49Fe

0. 46Mn

0. 20V) at deformation temperature 950 〜1200 °C and strain rate 0. 01 ~ 10 s

-1

are studied by hot compression test. Based on Arrhenius equation and Zener-Hollomon parameter model

the stress strain constitutive equation of HGH3126 alloy during hot deformation is established. By observing the microstructure of the HGH3126 alloy after high temperature compression

the effect of deformation temperature and strain rate on recrystallization behavior of the HGH3126 alloy is analyzed. The results show that the higher the deformation temperature

the easilier the dynamic recrystallization nucleation

the smaller the strain rate

and the more sufficiently the dynamic recrystallization process. With strain rate 0. 1 s

-1

at 1100 °C the complete dynamic recrystallization of the alloy has occurred basically.