第48卷第6期Vol.48No.6FORGING&STAMPINGTECHNOLOGY2023年6月Jun.2023基于修正Johnson-Cook本构模型的2209双相不锈钢高温流变行为张芳萍,成鑫尧,曹宇,张宏政,王超(太原科技大学重型机械教育部工程研究中心,山西太原030024)摘要:利用Gleeble-3800热模拟实验机,对2209双相不锈钢进行了单向热压缩实验,应变速率为0.01~10s-1,变形温度为950~1150℃。研究了2209双相不锈钢的高温流变行为,分析了应变速率和变形温度对双相不锈钢两相关系的影响,并对2209双相不锈钢在宽应变速率和宽变形温度下的Johnson-Cook本构模型进行了修正。结果表明:变形温度与应变速率对2209双相不锈钢的流动应力有显著影响,修正后的Johnson-Cook本构模型能较为精确地预测其高温流变行为,预测值与实验值的相关度为0.99817,平均相对误差为4.026%。关键词:2209双相不锈钢;高温流变行为;Johnson-Cook本构模型;应变速率;变形温度DOI:10.13330/j.issn.1000-3940.2023.06.030中图分类号:TG156.1文献标志码:A文章编号:1000-3940(2023)06-0223-08Hightemperaturerheologicalbehaviorof2209duplexstainlesssteelbasedonmodifiedJohnson-CookconstructivemodelZhangFangping,ChengXinyao,CaoYu,ZhangHongzheng,WangChao(EngineeringResearchCenterofHeavyMachinery,TaiyuanUniversityofScienceandTechnology,Taiyuan030024,China)Abstract:Theunidirectionalthermalcompressionexprimentof2209duplexstainlesssteelwasconductedatthestrainrateof0.01-10s-1andthedeformationtemperatureof950-1150℃bythermalsimulationmachineGleeble-3800,andthehightemperaturerheo-logicalbehaviorof2209duplexstainlesssteelwasstudied.Then,theinfluencesofstrainrateanddeformationtemperatureonthetwophasesrelationshipof2209duplexstainlesssteelwereanalyzed,andtheJohnson-Cookconstitutivemodelof2209duplexstainlesssteelatwidestrainrateandwidedeformationtemperaturewasmodified.Theresultsshowthatthedeformationtemperatureandstrainratehaveasignificanteffectontherheologicalstressof2209duplexstainlesssteel.ThemodifiedJohnson-Cookconstitutivemodelcanaccu-ratelypredictitshightemperaturerheologicalbehavior.Thecorrelationbetweenthepredictedandexperimentalvaluesis0.99817,andtheaveragerelativeerroris4.026%.Keywords:2209duplexstainlesssteel;hightemperaturerheologica...
