Study of the phase diagram and continuous cooling transformation of 12%Cr ultra-super-critical rotor steel英文文献资料

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1、MATERIALSCHARACTERIZATION59(2008)1133–1136ShortcommunicationStudyofthephasediagramandcontinuouscoolingtransformationof12%Crultra-super-criticalrotorsteelBaozhongWanga,b,WantangFua,⁎,YongLia,PingJianga,b,WenhuiZhanga,b,aYongjunTianaStateKeyLaboratoryofMetastableMaterialsScienceandTechnology,Coll

2、egeofMaterialsScienceandEngineering,YanshanUniversity,Qinhuangdao066004,PRChinabChinaFirstHeavyIndustries,Qiqihar,161041,PRChinaARTICLEDATAABSTRACTArticlehistory:Thepseudo-equilibriumphasediagramofa12%Crultra-super-criticalrotorsteelwasReceived29July2007calculatedbytheuseofThermo-Calcsoftware.T

3、heequilibriummicrostructuresatroomAccepted8August2007temperatureconsistofferrite(α)andcarbidesofM23C6type,andthecriticalpointsA1andA3ofthesteelare811°Cand928°C,respectively.ThecriticalpointsAc1,Ac3andMsKeywords:determinedbyadilatometrymethodare806°C,930°Cand395°C,respectively,whichareUltra-supe

4、r-criticalrotorsteelverysimilartothecalculatedvalues.Thecontinuouscoolingtransformation(CCT)curveofPhasediagramthesteelwasalsodetermined,andtheCCTproductsandmicrostructuralmorphologiesContinuouscoolingtransformationwereanalyzed.Thecriticalcoolingratewithoutproeutectoidferritetransformationisabo

5、utMicrostructure0.1°C/s,andthequantitativeexpressionbetweenmicrohardness(Hv)oftheCCTstructureHardnessandcoolingrate(v)forthesteelisasfollows:Hv¼48235expðv=0:89Þ30expðv=3:80Þ:©2007ElsevierInc.Allrightsreserved.1.Introductionforgingandpost-forgingheattreatmentetc.,islimitedtoafewcountriessofa

6、r.Thefrequentlyused12%CrsteelrotorblanksForthepurposesofimprovingthethermalefficiencyofcoal-aretypicallyforgedbymeansofhydraulicpressing.Becausefiredpowerplants,reducingtheCO2emissionaswellasmanykindsofalloyingelementsexistinthesteelandtheirfulfillingtherequirementofprotectingtheenvironmentandc

7、oncentrationsmaybehigh,themicrostructuralevolutionissavingenergysources,manydevelopedcountriesarevigor-complicatedduringthehotworking,sothatitisdifficulttoouslydevelopingultra-super-critical(USC)generatorswithrigorouslydefinetheho