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首页> 外文期刊>Journal of Materials Engineering and Performance >Modeling of Work Hardening During Hot Rolling of Vanadium and Niobium Microalloyed Steels in the Low Temperature Austenite Region
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Modeling of Work Hardening During Hot Rolling of Vanadium and Niobium Microalloyed Steels in the Low Temperature Austenite Region

机译：低温奥氏体区域钒和铌微合金钢的热轧过程中工作硬化的建模

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摘要

This work extends the application of the well-established Estrin and Mecking (EM) work-hardening model in unstable low temperature austenite region. The interaction between work hardening, recovery and softening attributed to recrystallization and transformation to ferrite under dynamic conditions is considered. Experimental parameters were varied to study the effects of strain, strain rate and temperature during hot rolling in the low temperature austenite region. Hot compression tests were performed two microalloyed steels-one containing V and the other Nb-at strain rates between 0.1 and 10 s(-1) over a temperature range of 750-1000 degrees C. A model is presented that describes the influence of dynamic recovery on flow behavior in the unstable austenite region. The modified work-hardening model incorporates an additional fitting parameter to the EM model and is dependent on the recovery and softening rates. The new model improved prediction in the unstable austenite region, while the original EM model gave better correlation at relatively higher temperatures when dynamic recrystallization is dominant or at relatively lower temperatures when only dynamic recrystallization to ferrite was the softening mechanism.
机译：该工作扩展了在不稳定的低温奥氏体区域中熟悉的雌激素和熔化（EM）工作硬化模型的应用。考虑了在动态条件下归因于重结晶和转化为铁氧体的加工硬化，回收和软化之间的相互作用。改变实验参数以研究低温奥氏体区域在热轧过程中应变，应变速率和温度的影响。在750-1000℃的温度范围内进行热压缩试验的两个含有V的微合金钢和其他Nb - 以0.1和10s（-1）的应变速率。提出了一种描述动态影响的模型不稳定奥氏体区域中的流动行为恢复。改进的工作 - 硬化模型将附加配合参数包含在EM模型中，取决于恢复和软化率。新模型改善了不稳定的奥氏体区域中的预测，而当动态再结晶在于时，当仅动态重结晶到铁氧体时，原始EM模型在相对较高的温度下在相对较高的温度下进行了更好的相关性。

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