一种反应器用12Cr2Mo1钢的热变形行为及热加工图

Hot Deformation Behavior and Hot Processing Map of 12Cr2Mo1 Steel for A Reactor

以一种加氢反应器用钢12Cr2Mo1为研究对象,利用Gleeble-3800热/力模拟试验机,在变形温度850~1150℃、应变速率0.001~0.1 s^(-1)进行了真应变为0.8的热压缩。回归计算了考虑应变补偿的本构方程,建立了基于动态材料模型的热加工图,分析了热变形条件下的组织演化规律。结果表明,利用5次多项式回归计算得到的本构方程可用来预测不同应变下的流变应力;随着变形温度的升高和(或)应变速率的降低,动态再结晶水平增加;在1050℃和0.001 s^(-1)的热变形下,12Cr2Mo1钢可获得均匀的完全动态再结晶组织。

Taking 12Cr2Mol steel for a hydrogenation reactor as the research object, hot compression of the steel was carried out by using Gleeble-3800 thermal simulator at the deformation temperature of 850-1150 ℃, the strain rate of 0.001- 0.1 s-1 and the true strain of 0.8. A constitutive equation of considering strain compensation was calculated. The hot processing map based on the dynamic material model was established, and microstructure evolution during hot deformation was analyzed. The results show that the constitutive equations calculated by using a 5 order polynomial can be used to predict the flow stress under different strain; with the increase of deformation temperature and/or decrease of strain rate, the level of dynamic recrystallization （DRX） increases; uniform and complete dynamic recrystallization microstructure of thel2Cr2Mol steel can be obtained under the hot deformation condition of 1050℃ and 0.001 s-1.