低活化铁素体/马氏体钢的静态再结晶行为

Static recrystallization behavior of reduced activation ferritic /martensitic steel

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。

Static recrystallization behavior of reduced activation ferritic /martensitic ( RAFM) steel was studied using Gleeble-3500 thermo-simulation machine by two-pass hot compression test during high temperature thermal deformation pass interval time .Effects of different interval time, deformation temperature , strain rates and degrees of reduction on static recrystallization behavior were discussed and analyzed , and static recrystallization softening fractions under different deformation conditions were calculated by 2%stress offset method .The results show that the static recrystallization behavior is accelerated with the increase of inter -pass time, deformation temperature, strain rate and deformation under other same deformation conditions .The static recrystallization activation energy of RAFM steel is 293 335 J/mol, the kinetic model is established based on the regression of test results , and the calculated value is good agreement with the measured value .