【摘要】 为了获得细晶铁素体/贝氏体的复相组织,通过控轧控冷工艺研究了低碳锰钢在奥氏体区变形时变形量、终轧温度和卷取温度对组织演变和力学性能的影响规律.研究表明,增加变形量(对应道次间隔时间缩短)可以细化铁素体晶粒,但当终轧温度降低到800℃时,变形量的增加以及开冷温度的降低不利于贝氏体组织的获得.通过调整变形量、终轧温度、可开冷温度并适当降低卷取温度,可使实验钢获得晶粒尺寸约为5μm的铁素体和10%~20%的贝氏体组织,低碳锰钢强塑性能良好.更多还原

【Abstract】 In order to obtain the fine-grained ferrite/bainite duplex microstructure,influences of deformation amount,finish rolling temperature and coiling temperature on microstructures and mechanical properties of low carbon manganese steel were studied by thermo-mechanical controlled process(TMCP) experiments.The results indicate that the increase in deformation amount refines the ferrite grain but retards the formation of bainite at the finish rolling temperature of 800 ℃.The ferrite grain size of about 5 μm and 10%~20% bainite can be gained by optimizing the deformation amount,finish rolling temperature,accelerating the cooling temperature and decreasing the coiling temperature.Good mechanical properties for low carbon manganese steel are obtained as well.更多还原