Static Recrystallization Behavior of Austenite in HSLA 100 DuringThermomechanical Controlled Processing (TMCP)

摘要

The austenite recrystallization behavior during the hot deformation of HSLA-100was characterized in order to determine parameters for thermomechanical controlled processing. The steel was reheated to 2000 deg F (1093 deg C) and subjected to multiple isothermal deformations at 1800 deg F (982 deg C) and 1650 deg F (900 deg C) under various levels of deformation and hold times. At 10% deformation per hit, the steel took longer than 20 seconds to recrystallize at 1800 deg F (982 deg C) after three hits while at 1650 deg F (900 deg C) the steel did not recrystallize during the hold periods. At 20% deformation per hit, the steel began to recrystallize after the first hit after 20 seconds and recrystallized repeatedly after each subsequent hit during all of the hold periods at 1800 deg F (982 deg F) while at 1650 deg F (900 deg C), recrystallization occurred after three hits and the 20 second hold time.