在Gleeble-3800热模拟试验机上进行热变形试验，研究不同钒质量分数的直接切削用非调质钢在变形温度为950～1150℃，应变速率为0.1～10 s-1，变形量为60%的单道次压缩的奥氏体再结晶过程，计算得出V1钢的动态再结晶激活能Qd比V2钢提高了79.617 kJ/mol，增加钒质量分数具有抑制奥氏体动态再结晶发生的作用。根据试验模拟结果并结合实际生产情况，确定V1钢和V2钢最佳的热加工工艺参数。
The study carried out thermal deformation experiment by Gleeble-3800 thermal simulation,and the austenite dynamic recrystallization process of non-quenched and tempered steel with different V contents in single pass compres-sion with strain rate 0.1-10 s-1 and deformation 60%at 950-1 150℃was studied. The calculated dynamic recrystallization activation energies of V1 steel increased by 79.617 kJ/mol than that of V2 steel,and the increase of vanadium content de-lays the austenite dynamic recrystallization . Based on the experimental results and combined with the actual production, the optimal parameters of thermal process were determined.
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