Medium carbon V-N treated steel grade applied for long products and sm
all drop forged parts investigated in a state of incomplete solution o
f V(C,N) precipitates. Activation energy changes investigated in the 8
50-1200 degrees C temperature range and 0.6-30 s(-1) strain rate range
is revealed to be temperature dependent. Calculated for sigma(p) flow
stress Value this energy in some cases expresses a combination of var
ious processes. It is found that DRX starts well below epsilon(p) Soft
ening during a short interpass time is caused by dynamic recrystalliza
tion DRX during forming and is followed by metadynamic recrystallizati
on MDRX and static recrystallization SRX. At longer interpass times so
ftening progress is hindered by precipitation.