The tested alloy UNS N06625 (/% : 0.027C

0.005S

0.005P

0.27Si

0.07Mn

21.68Cr

62.93Ni

9.00Mo

3.98Nb

0.20Ti

1.22Fe

0.143Al) is melted by a 3t medium frequency induction furnace

remelted by a 3t ESR furnace and forged to products. The tensile test at 950〜1180℃ with deformation rate 5 s

-1

and the compression test with deformation rate 1

5 and 10 s

-1

and true strain 0.9 of alloy UNS N06625 have been earned out by Gleeble 1500D thermal simulator to get the deformation resistance

reduction of area and true stress-strain curves. With analysis on deformation resistance and reduction of area of the alloy

it is defined that the hot-working temperature zone of alloy UNS N06625 is 975〜1180℃ ; the effect of deformation temperature and rate on dy

namic recrystallization of the alloy is studied and the peak stress model and the critical deformation model for dynamic recrystallization of alloy UNS N06625 are established by combined calculation of stress and strain data. The production practice of 5t ESR ingot shows that the suitable breakdown temperature of the alloy is 1120 °C.