论文部分内容阅读
用扭转实验方法,对低碳锰铌钢进行了研究.建立了幂函数形式的本构方程.确定了稳态流变应力与热塑性之间的关系.考虑到累积应变效应,对动态再结晶过程进行了初步研究.分析了温度、应变率、Nb(CN)沉淀对动态软化百分数的影响.动态再结晶过程中,激活能和应力指数的变化,在一定程度上反映了Nb(CN)的沉淀.定义(?)/(?)为沉淀指数,用以定量地说明温度,应变率对Nb(CN)沉淀过程的影响.此外,还对应变率敏感系数与温度,剪切应变之间的关系进行了研究.
The low carbon manganese-niobium steel was studied by means of torsion test. The constitutive equation of power function was established and the relationship between the steady-state flow stress and the thermoplastic property was established. Considering the cumulative strain effect, the dynamic recrystallization The effects of temperature, strain rate and Nb (CN) precipitation on dynamic softening percentage were analyzed.The changes of activation energy and stress index during dynamic recrystallization reflect the precipitation of Nb (CN) to some extent The definition (?) / (?) Is the precipitation index to quantitatively explain the influence of temperature and strain rate on the precipitation of Nb (CN) .In addition, the relationship between the strain rate sensitivity and temperature and shear strain Were studied.