Abstract:
The influence of hot
deformation conditions on static and dynamic recrystallization
behaviour of 12CrNi3A and 18Ni maraqing steels was studied.
Using the Zener-Hollomon parameter in the dynamic
recrystallization diaqram for reference, a new parameter Y(=tZmexp(-Qrec/RT))
is recommended and a static recrystallization diagram put
forward. The occurrence of static recrystallization of hot
deformed austenite in 12CrNi3A and 18Ni carraqing steels was
determined as a function of Y parameter (the holding time
modified by temperature and stain rate). The structural changes
after deformation in hot deformed austenite may be described by
the static recrystallization diagram (Y-ε diagram). The
procedure for building the static recrystallization diagram may
be simplified by introducing the parameter Y, and a simple and
east method for building the dynamic recrystallization diagram
with log-log scale was recommended.
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