文章编号：1009−444X（2022）04−0435−05304不锈钢热变形行为及本构模型研究姚硕1a，陈志英1a，张莹1b，曹峰华2，孙彦1b（1.上海工程技术大学a.机械与汽车工程学院；b.材料科学与工程学院,上海201620；2.上海电机学院机械学院,上海200245）σp摘要：利用Gleeble−3800热/力学模拟试验机研究304不锈钢热变形行为，通过变形温度区间为800～1200℃，应变速率区间为0.001～1s−1的热压缩试验，得到304不锈钢在此区间的真实应力−应变曲线.结果表明，304不锈钢在热变形过程中，流动应力随着温度的降低和应变速率的升高而增大.根据真实应力−应变曲线构建304不锈钢的Arrhenius本构方程，其热变形激活能为490kJ/mol，lnZ和ln之间的线性相关系数为0.93，说明模型应力预测值与试验值吻合较好.关键词：304不锈钢；热变形；流动应力；本构模型中图分类号：TG316文献标志码：AStudyonthermaldeformationbehaviorandconstitutivemodelof304stainlesssteelYAOShuo1a，CHENZhiying1a，ZHANGYing1b，CAOFenghua2，SUNYan1b（1.a.SchoolofMechanicalandAutomotiveEngineering；b.SchoolofMaterialsScienceandEngineering,ShanghaiUniversityofEngineeringScience,Shanghai201620,China；2.SchoolofMechanicalEngineering,ShanghaiDianjiUniversity,Shanghai200245,China）σpAbstract：Thermaldeformationbehaviorof304stainlesssteelwasinvestigatedbyutilizingGleeble−3800thermo-mechanicalsimulator.Thetruestress-straincurvesof304stainlesssteelwereobtainedthroughthehotcompressionexperimentwithtemperaturerangeof800～1200℃andthestrainraterangeof0.001～1s−1.Theresultsshowthattheflowstressof304stainlesssteelincreaseswiththereductionoftemperatureandthegrowthofstrainrateduringthehotdeformation.Accordingtothetruestress-straincurves,theArrheniusconstitutiveequationof304stainlesssteelwasconstructed.Thehotdeformationactivationenergyis490kJ/molandthelinearcorrelationcoefficientbetweenlnZandlnis0.93,whichshowsthatthestressvaluespredictedbythemodelareingoodagreementwiththeexperimentalones.Keywords：304stainlesssteel；thermaldeformation；flowstress；constitutivemodel304奥氏体不锈钢具有优良的韧塑性、抗氧化性、耐蚀性和机械性能，被广泛应用于航空制造业、交通、核工业、医疗、建材、化工和食品加工等领域...
