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首页> 外文期刊>Journal de Physique, IV: Proceedings of International Conference >Mechanical behaviour and microstructural evolution of a microalloyed C-Mn steel during hot forming process
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Mechanical behaviour and microstructural evolution of a microalloyed C-Mn steel during hot forming process

机译：微合金碳锰钢热成型过程中的力学行为和组织演变

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摘要

The mechanical behaviour of a C-Mn steel is investigated under different thermomechanical paths, in order to determine its constitutive equation in industrial hot rolling conditions. Compression tests were performed and the maximum admissible strain level so that friction remains negligible was determined by numerical simulation. The limited maximum total strain requires selecting the key features of the thermomechanical path. It is shown that the austenitising temperature has a great influence on the mechanical and microstructural evolution of the steel. The influence of recrystallization in the roughing mill on the mechanical behaviour has been investigated by double compression tests, and seems not to be very important. The influence of strain and austenitising temperature on the phase transformation has also been studied. The austenitising temperature strongly affects the grain size, and the kinetics of phase transformation can be well understood using this parameter. But the strain raises the transformation start temperature up to a point at which the grain size is not a relevant parameter.
机译：为了确定工业热轧条件下的本构方程，研究了C-Mn钢在不同热力学路径下的力学行为。进行了压缩试验，并通过数值模拟确定了最大容许应变水平，从而使摩擦保持可以忽略不计。有限的最大总应变要求选择热机械路径的关键特征。结果表明，奥氏体化温度对钢的力学和微观组织演变有很大影响。粗压缩机中的再结晶对机械性能的影响已通过双重压缩试验进行了研究，似乎并不十分重要。还研究了应变和奥氏体化温度对相变的影响。奥氏体化温度强烈影响晶粒尺寸，使用该参数可以很好地理解相变动力学。但是，应变使相变开始温度升高到与晶粒尺寸无关的点。

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