高碳钢线材轧制工艺参数对晶粒尺寸的影响

结合高碳钢线材的生产实际，利用物理冶金理论和实验模型，对奥氏体的变形-再结晶过程进行模拟计算，计算出各道次的奥氏体晶粒尺寸并分析变化规律。模拟计算结果表明，亚动态再结晶在粗轧和中轧阶段起主要作用，在轧制后半程，静态再结晶起主要作用。分析改变生产工艺参数对晶粒尺寸的影响以及晶粒细化的途径。为进一步的相变、性能预测提供指导依据。

Influence of wire rolling process parameters on austenite grain size of high carbon steel

The austenite deformation-recrystallization process during high-speed rolling of the high carbon steel wire have been simulated and calculated,and the austenite grain size of the rolling stock and the law of its variation pass-by-pass calculated by application of the physical metallurgy theory and experimental model.The results indicate that meta-dynamic recrystallization(MRX) is the dominant microstructure process in rough and intermediate passes,and static recrystallization(SRX) is the dominant one in later passes.And effects of change of process parameters on austenite grain size and approach to refinement of the austenite grain size is analyzed.It provides the guiding principle for prediction of phase transformation and properties.