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采用热模拟压缩实验、热-力耦合刚塑性有限元和动态再结晶唯象模型相结合的方法,以HPS485wf钢为研究对象,模拟了热压缩应变量对该钢试样内部动态再结晶状态及其变化的影响。结果表明:该钢试样内部等效应变、动态再结晶体积分数和平均晶粒尺寸的分布特征与应变量无关;各参量的数值分布特征区域大小与应变量有关,且均经历了相同的扩张过程;动态再结晶参量的数值分布及其变化主要与等效应变的分布及其变化有关,摩擦和温降的影响也不能忽视。
Using the method of thermal simulation compression experiment, thermal-mechanical coupling rigid-plastic finite element method and dynamic recrystallization phenomenal model, taking the HPS485wf steel as the research object, the dynamic recrystallization state of the steel specimen was simulated, The impact of its change. The results show that the distribution characteristics of internal equivalent strain, dynamic recrystallization volume fraction and average grain size have nothing to do with the amount of strain. The numerical distribution of each parameter is related to the amount of strain and both have the same expansion The numerical distribution and its change of dynamic recrystallization parameters are mainly related to the distribution and change of equivalent strain. The influence of friction and temperature drop can not be neglected either.