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DYNAMIC TRANSFORMATION OF AUSTENITE TO FERRITE DURING THE TORSION SIMULATION OF STRIP ROLLING

机译：条带轧制扭转模拟过程中奥氏体对铁氧体的动态转化

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Torsion simulations of strip rolling were carried out on a 0.06%C-0.3%Mn-0.01%Si steel over the temperature range 930°C to 1000°C. Pass strains of 0.4 were applied at a strain rate of Is'1. Interpass times of 0.5s, Is, 1.5s and 3s were employed to determine the mean flow stresses (MFS's) applicable to strip rolling. By means of double differentiation, critical strains of 0.04 and 0.11 were established for the initiation of dynamic transformation and dynamic recrystallization, respectively. It is shown that the dynamic transformation of austenite to ferrite takes place above the Ae_3 temperature, resulting in significantly lower than expected MFS values. The nucleation of ferrite reduces the rolling load and modifies the microstructure. Shorter interpass times produce larger decreases in MFS than longer ones because of reduced recovery during short interpass intervals.
机译：在930℃至1000℃的温度范围内，在0.06％C-0.3％Mn-0.01％Si钢上进行带轧辊的扭转模拟。以0.4的应变率施用0.4的通过菌株。采用0.5秒，1.5s和3S的地间时间用于确定适用于条带轧制的平均流量应力（MFS）。通过双分化，分别为动态转化和动态再结晶的启动而建立了0.04和0.11的临界菌株。结果表明，奥氏体对铁氧体的动态变换在AE_3温度之上进行，导致显着低于预期的MFS值。铁氧体的成核减少了滚动载荷并改变微观结构。由于短间隔期间恢复降低，较短的接口时间在MFS中产生较大的降低。

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