2.25Cr-1Mo-0.25V钢的热变形行为及其形变组织

采用Gleeble3500热模拟试验机对加氢反应器用2.25Cr-1Mo-0.25V钢进行不同变形温度、不同应变速率的热压缩变形试验,并分析和讨论了再结晶组织的演变规律。结果表明,该钢高温流变应力和峰值应变随变形温度的降低和应变速率的提高而增大,确定了热变形激活能和热变形方程;再结晶晶粒的数量随应变量的增加而增加;变形温度越高,应变速率越小,再结晶现象更容易发生,并且进行的更完全。

Hot deforming behaviors and microstructures of 2.25Cr-1Mo-0.25V steels

The hot pressure deforming tests under different deforming conditions were carried out by using of Gleeble3500 thermal simulator for 2.25Cr-1Mo-0.25V used for hydrogenation reactor.The recrystallization behaviors of this steel were also analyzed and discussed.The results show that the flow stress and peak stress under high temperature increase with decreasing the deforming temperature and increasing the strain rate.The hot deforming active energy and formulation are calculated and founded,respectively.The amount of recystallization grain increases with increasing the strain.higher is the deforming temperature and lower is the strain rate,more easily the recrystallization occurs.