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1、MaterialsScienceandEngineeringA526(2009)128–133ContentslistsavailableatScienceDirectMaterialsScienceandEngineeringAjournalhomepage:www.elsevier.com/locate/mseaHotdeformationbehaviorofanewaustenite–ferriteduplexstainlesssteelcontaininghighcontentofnitrogenY.L.Fanga,Z.Y.Liua,∗,H.M.Songb,L.
2、Z.JiangbaStateKeyLaboratoryofRollingandAutomation,NortheasternUniversity,HepingQu,WenhuaSt,Shenyang110004,Liaoning,PRChinabResearchInstituteforStainlessSteels,R&DCenter,BaosteelCo.,Shanghai201900,PRChinaarticleinfoabstractArticlehistory:Thehotdeformationbehaviorofacost-savingduplexstainl
3、esssteel(DSS)of22Cr–1Ni–0.7MowithNReceived3July2008contentof0.36ms%wasstudiedovertherangeoftemperaturesfrom1000to1200◦CandstrainratesfromReceivedinrevisedform5July20090.01to10s−1byhotcompressiontests.TheprocessingmapwasestablishedtointegratetherelationshipAccepted10July2009betweenhotwork
4、abilityandmicrostructuralevolution.Bothdomainsfortemperaturesfrom1000to1050◦Candstrainrateof0.01s−1andtemperaturesfrom1150to1200◦Candstrainrateof0.01s−1werefoundtobetheoptimumhotworkingregimes,inwhichthemicrostructureexhibiteddynamicKeywords:recrystallization(DRX).Theunstablehotworkingdo
5、mainswereclearlyindicatedbytheprocessingmap.DuplexstainlesssteelWedgecracking,macro-crackinganddynamicstrainageing(DSA)hadoccurredduringhotdeformationHotdeformationbehaviorProcessingmapsunderthesehotworkingconditions,ingoodagreementwiththepredictionsbytheprocessingmap.Hotworking©2009Else
6、vierB.V.Allrightsreserved.1.Introductioncouldbeevaluatedasafunctionoftemperatureandstrainrate.MetallurgicalinstabilityduringplasticflowisconsideredtooccurExcellentcombinationsofstrength,toughnessandgoodcorro-intheregimeswheretheZieglerfunctionisnegative[9].Processingsionresistanceundercri
7、ticalworkingconditionsarepromotingmapshavebeenwidelyappliedtotheoptimizationofhotworkingDSSsassuitablealternativestoconventionalausteniticstainlessprocessesofstainlesssteelssuchasAISI304L,304and316L[10–14].steels.Thisisparticularlytrueinoilextraction,papermanufactur-Inour
