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在Gleeble-1500D热模拟实验机上,使用双道次热压缩的方法,研究了30Cr2Ni4MoV低压转子钢在高温变形时的静态再结晶行为。讨论了变形温度、应变、应变速率与原始晶粒尺寸对其静态再结晶的影响。根据实验结果,建立了30Cr2Ni4MoV钢静态再结晶动力学模型以及静态再结晶晶粒尺寸模型。实验结果表明:间隔时间越长、变形温度越高、应变和应变速率越大,静态再结晶体积分数越大;变形温度越低、应变越大、原始晶粒尺寸越小,静态再结晶晶粒越细小。
The static recrystallization behavior of 30Cr2Ni4MoV low-pressure rotor steel during high temperature deformation was studied on Gleeble-1500D thermal simulation machine by using two-pass sub-thermal compression method. The effects of deformation temperature, strain, strain rate and original grain size on its static recrystallization were discussed. According to the experimental results, the static recrystallization kinetics model of 30Cr2Ni4MoV steel and the static recrystallization grain size model were established. The experimental results show that the longer the interval time is, the higher the deformation temperature is. The larger the strain and strain rate are, the larger the static recrystallization volume fraction is. The lower the deformation temperature is, the larger the strain is and the smaller the original grain size is. The finer.