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在Gleeble-3500热模拟试验机上采用双道次压缩试验对低活化铁素体/马氏体(RAFM)钢在高温热变形道次间隔时间内的静态再结晶行为进行了研究,分析了不同间隔时间、变形温度、应变速率和变形量等因素对静态再结晶行为的影响。采用2%应力补偿法计算了不同变形条件下,钢的静态再结晶软化百分数。结果表明,在其它变形条件不变的情况下,道次间隔时间的延长、变形温度的升高、应变速率的增大及变形量的加大均加速静态再结晶软化行为的进行;RAFM钢静态再结晶激活能为293 335 J/mol,通过对试验结果进行回归建立了静态再结晶动力学模型,且模型计算值与实测值吻合良好。
The static recrystallization behavior of low activation ferrite / martensite (RAFM) steels during high temperature hot deformation passes was investigated on a Gleeble-3500 thermal simulator using a two-pass compression test. The effects of different intervals Time, deformation temperature, strain rate and deformation and other factors on the static recrystallization behavior. The percent of static recrystallization softening of steel under different deformation conditions was calculated by 2% stress compensation method. The results show that the static recrystallization softening behavior of RAFM steels is accelerated under the condition of other deformation conditions, such as prolonging the interval time, increasing the deformation temperature, increasing the strain rate and increasing the deformation. The recrystallization activation energy was 293 335 J / mol. The static recrystallization kinetics model was established by regression analysis of the experimental results. The calculated values agree well with the measured values.