贝氏体钢彩色金相的研究

3410200910HEATTREATMENTOFMETALSVol134No110October2009,,,,,(,066004):,2,XRD,,:;;:TG14211:A:025426051(2009)1020042204ColoredmetallographyofbainitesteelHANBo,ZHANGFu2cheng,LBBo,ZHENGChun2lei,ELi2jun,ZHANGPeng(StateKeyLaboratoryofMetastableMaterialsScience&Technology,YanshanUniversity,QinhuangdaoHebei066004,China)Abstract:Microstructureoftwokindsoflow2carbonalloyedsteelsafterquenching,isothermalquenchingandnormalizingwasstudiedwithcoloredmetallography2chemico2etchingmethod1Usingtheimageprocessingsystem,thefractionofthebainitephasewascalculated1WithXRDmethod,thecontentoftheresidualaustenitewasexamined1Atlast,themartensitephasecontentwasobtained1Theresultsshowthatitisfeasibletoanalyzethemultiplephasesquantitativelyofthebainitesteelusingthecoloredmetallographictechnology1Keywords:bainitesteel;coloredmetallography;microstructure:2009203212:(50671091,5087109450821001);(200802160005):(1984),,,,E2mail:hmeng521@1261com:,:033528063949,E2mail:zfc@ysu1edu1cn,,,XTEMMossbauer[1],,,,[2],[3],,11,20mm,2,A6;A7;B,1(,%)Table1Chemicalcompositionoftheteststeels(wt%)CAlSiMnCrNiPSWA0126113411831174116201410101901010110B0129114911032114010601019010122Table2Heattreatmentprocessoftheteststeels///hA1A2A3A4A59309309309309303203203203203201251748()A6B930930()A793010,:43Lepera[2],10g/L40g/L11;1%4%,2%,,Axiover200MAT,25,(),,Lepera,,,,[1]RigakuD/max22500/PCXCu[4]:(220)(220)(311)(211)214A7,,C,A71A7Lepera(a)(b)Fig11MicrostructureofsampleA7etchedbyLeperareagent(a)andetchedbyhyposulfiteofsodaandpicricacidreagent(b)2ALeperaFig12MicrostructureofsteelAetchedbyLeperareagent(a)A1;(b)A2;(c)A3;(d)A4;(e)A5;(f)A64434,,,10s1A7Lepera,1(a);1(b)ALepera3AFig13MicrostructureofsteelAetchedbyhyposulfiteofsodaandpicricacidreagent(a)A1;(b)A2;(c)A3;(d)A4;(e)A5;(f)A6232,3,,4B,4(a);4(b),3,2,ALepera,2,,,3,,,Axiover200MAT,,,,33,4BLepera(a)(b)Fig14MicrostructureofsteelBetchedbyLeperareagent(a)andetchedbypicrateandhyposulphitereagent(b)10,:45A5A3X63Table3Volumepercentofbainiticinteststeelsbydifferentreagents/(vol%)LeperaA14819349114A26611765138A37715975162A48211790111A59010993139A68715189138A7B88116891935AFig15TransformationquantityofbainiticinsteelAunderdifferentheattreatments6A3XFig16X2raydiffractionpatternofsampleA34A1A3B4,A1A3B915%419%719%,,4Table4Microstructurecontentsofthesamples/vol%/vol%/vol%A14819041157915A37716017151419B8811631947195A1BTable5MechanicalpropertiesofsampleA1andsteelB/MPa/MPa/(Jcm-2)A11763145184B14601420109,,XRD,A1B,545,A1B3:,BA1,A131),2),Lepera,,Lepera:[1]GiraultE,JacquesP,HarletP,etal.Metallographicmethodsforrevea2lingthemultiphasemicrostructureofTRIP2assistedsteels[J].ElsevierScience,1998,40(2):1112112.[2].[J].,2002,7(1):122.[3],,.[J].,1997,19(2):61266.[4]ZambrzhitskiyVN.InfluenceofdeformationrateonthemartenstictransformationofFe2Ni2CalloysandTRIPsteel[J].PhysicsofMetalsandMetallography,1974,37(4):1472152.