Abstract
The influence of hot deformation conditions on static and dynamic recrystallisation behaviour of 18%Ni maraging steel was studied. Using the Zener–Hollomon parameter in the dynamic recrystallisation diagram for reference, a new parameter Y (=tZmexp(−Qrec/RT)) is recommended and a static recrystallisation diagram proposed. The occurrence of static recrystallisation of hot deformed austenite in 18%Ni maraging steel was determined as a function of the parameter Y (the holding time modified by temperature and strain rate). The structural changes after deformation in hot deformed austenite may be described by the static recrystallisation diagram (Y–ɛ diagram). The procedure for constructing the static recrystallisation diagram may be simplified by introducing the parameter Y.
MST/699
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