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The kinetics of dynamic recrystallization of a low carbon vanadium-nitride microalloyed steel

机译：低碳氮化钒钒微合金钢的动态再结晶动力学

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摘要

Single-pass compression tests were performed on a Gleeble-3800 thermo-mechanical simulator to study the dynamic recrystallization behavior of a low carbon vanadium-nitride microalloyed steel at the temperature in the range from 900 ℃ to 1050 ℃ and strain rate in the range from 0.1 s~(-1) to 10 s~(-1). Based on the flow curves from the tests, the effects of temperature and strain rate on the dynamic recrystallization behavior were analyzed. With the assistance of the process parameters, constitutive equations were used to obtain the activation energy and hot working equation. The strain hardening rate versus stress curves were used to determine the critical stress (strain) or the peak stress (strain). The dependence of the characteristic values on Zener-Hollomon was found. The dynamic recrystallization kinetics model of the tested steel was constructed and the validity was confirmed based on the experimental results.
机译：在Gleeble-3800热机械模拟器上进行了单次通过压缩试验，以研究低碳氮化钒钒微合金钢在900℃至1050℃的温度范围内以及应变率在0.1 s〜（-1）至10 s〜（-1）。根据试验的流动曲线，分析了温度和应变速率对动态再结晶行为的影响。借助过程参数，本构方程用于获得活化能和热加工方程。应变硬化率与应力的关系曲线用于确定临界应力（应变）或峰值应力（应变）。发现特征值对齐纳-所罗门的依赖。建立了试验钢的动态再结晶动力学模型，并根据实验结果验证了其有效性。

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