不同冷却速度下双相不锈钢-相变过程的原位观察

P(,200072)()()(),,,;,,,,,P:,,,,:021256339220,E2mail:xianga808@1631comIN2SITUOBSERVATIONSOFFERRITEPAUSTENITETRANSFORMATIONSINADUPLEXSTAINLESSSTEELATVARIOUSCOOLINGRATESZhouLeileiLinDawei(ShanghaiUniversity)ZhouCandongWangChengquanSongHongwei(BaosteelTechnologyCenter)AbstractTransformationofinaduplexstainlesssteelwasobservedin2situbyusingaconfocalscanninglasermicroscopeatvariouscoolingrates.Itwasfoundthatathighercoolingrate,the2phaseprecipitatedfirstatthegrainboundariesandspreadsharplyintotheinitialgrain,andthemainshapeof2phasewassword2likepatterns.Whileatlowercoolingrate,the2phaseprecipitatedfirstatthegrainboundarieswithsheetpatterns,andthenspreadintotheinitialgrainalongthelongitudinaldirectionaswellasitsflankaugmenting,andthegrainboundariesmigratedatthecourseoftransformation.Thereasonforthetransformationbehaviorsofatvariouscoolingrateswasdiscussedinthelightofthesolidstatetransformationnucleationtheoryanddiffusioncontrolledgrowththeory.KeyWordsDuplexStainlessSteel,PTransformation,CoolingRate,ConfocalScanningLaserMicroscope,In2situObservation130%[1],[24],2080,21,,,,,,,293Vol129,No131920075SHANGHAIMETALSMay,2007©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(ConfocalScanningLaserMicroscope,CSLM),Yin[5]CSLM,,Liu[6]CSLM,[7]CSLMAISI304+L,,CSLM,2,15mm3mm,,,+(32),15V,15s1min,CSLM,,40Pmin100Pmin1400(),2min,100Pmin10PminCSLM,,1CCrNiSiMnMoNFePwt%010324266701801835012013CSLM,CSLM[8,9]CSLMLasertecHe-Ne,,3311100Pmin1100Pmin1140,,1(a)10s,,()1(c)1(d),,,,,,,,,1075,416mPs,1075,213mPs31210Pmin210Pmin2(a),1175,,,,2(b)2(e),,,,,,,1060,,2(e)2(f)12,100Pmin,,,;10Pmin,0229©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(100Pmin),,,,T,,1140(10Pmin),,,,,,,,1175(100Pmin),T,,,,,(10Pmin),T,rC,,,,,,,2,,,,,123:/©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[5],,,(100Pmin),,,,,,(10Pmin),,,,,,,,,GVD,GVD,T,GVD[12],,(T),,5(1),,2229©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(2),,;,,(3),,;,,(4)[1].[M].:,2000[2]Iza2mendiaA,Pinol2jueaA,UrcolaJJ,etal.Microstructuralandmechanicalbehaviorofaduplexstainlesssteelunderhotworkingconditions[J].MetallurgicalandMaterialsTransactionsA,1998,29:29752985[3]HutchinsonWH,UshiodaK,RunnsjG.Anisotropyoftensilebehaviorinaduplexstainlesssteelsheet[J].MaterialsScienceandTechnology,1985,1:728731[4]WolfgangReick,MichaclPohl.Recrystallization2transformationcombinedreactionsduringannealingofacoldrolledferritic2austeniticduplexstainlesssteel[J].ISIJinternational,1998,38(6):567571[5]YinH,EmiT,ShibataH.Morphologicalinstabilityof2ferriteP2austeniteinterphaseboundaryinlowcarbonsteels[J].ActaMater,1999,47(5):15231535[6]ZhongzhuLiu,YoshinaoKobayashi,JianYang,etal.In2situobservationofthePphasetransformationonthesurfaceoflowcarbonsteelcontainingphosphorusatvariouscoolingrates[J].ISIJinternational,2006,46(6):847853[7],,.AISI304[J].,2006,42(8):805809[8]MarkReid,DominicPhelan,RianDippenaar.Concentricsolidificationforhightemperaturelaserscanningconfocalmicroscopy[J].ISIJInternational2004,44(3):565572[9]N.J.Mcdonald,S.Sridhar.Observationsoftheadvancing2ferriteP2austenitePliquidinterfaceduringtheperitecticreaction[J].JournalofMaterialsScience,2005,(40):24112416[10].[M].:,1998[11].[M].:,2002[12],.[M].:,1980:2006212206gindalbie,,400tKarara,2008,1000tGindalbie,,,500t,118(1135),,,10,,,Gindalbie,,(),MB,913323:/©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.