淬火方式对M42高速钢组织和性能的影响_马凯

19220144Vol.19No.2MaterialsScienceandEngineeringofPowderMetallurgyApr.2014M4211,2111(1.4100832.410083)()M42SEMAFMXRD(1~35/s)150~200nm30~60nm835HV788HV945HV1002HV856HV924HVTG142.45A1673-0224(2014)2-241-07EffectsofquenchingmethodsonmicrostructureandpropertiesofM42highspeedsteelMAKai1,YANGFu-liang1,2,HUANGKe1,GUOLei1,LIUPeng1(1.SchoolofMaterialsScienceandEngineering,CentralSouthUniversity,Changsha410083,China;2.KeyLaboratoryofNonferrousMetalMaterialsScienceandEngineering,MinistryofEducation,CentralSouthUniversity,Changsha410083,China)Abstract:M42highspeedsteelwasquenchedbymediumofsand,fog,oilandwater.BymeansofSEMAFMXRDandVickershardnesstester,theeffectofquenchingrateonthemicrostructureandhardnessofPMM42highspeedsteelwasstudied.Theresultsshowthat,withincreasingthecoolingrate,thecontentofcarbideprecipitationduringthequenchingprocessdecreases,whilethecontentofretainedausteniteincreases.Dimensionoftemperedmartensitereducesfrom150~200nmto30~60nm,andthequantumofsecondarycarbideprecipitationonthegrainboundaryofmartensiteincreaseswhilethesizedecreases.Hardnessofquenchedalloyreducesfrom835HVto788HV,andthesecondaryhardeningeffectismoreobviousduringthetemperingtreatment,meanwhile,hardnessoftemperedalloyincreasesfrom945HVto1002HV,redhardnessincreasesfrom856HVto924HV.Keywords:highspeedsteel;quenchingmethod;secondaryhardening;redhardnessWMoCrVM42(W2Mo9Cr4VCo)[1−3](2011BAE09B03)[e-mail]20144242RakaybyM42M2C4.17Å[4][5]M421M4211.1M42111.57mmM421(%)Table1Chemicalcompositionofexperimentalmaterials(massfraction,%)CMnCrVMoWCoP+SFe1.070.203.951.159.51.508.000.025Bal.1(mm)Fig.1Sketchofspecimen(unit:mm)(Note:M42HSSisthesimplificationofM42highspeedateel)2M2CM6C1.215/min120510min5401h32M42Fig.2SEMmicrographofM42highspeedsteel142035/s1.3(4g/100mL)()Quanta-200SolverP47(AFM)D/Max2500XHV-10B22.133(a)(b)(3(c)(d))1/s35/s192M422433M42Fig.3SEMmicrographsofM42highspeedsteeltreatedbydifferentquenchingmethods(a)Sand-cooling;(b)Fog-cooling;(c)Oil-cooling;(d)Water-cooling4M42XRD4(b)4(a)(110)(110)α[6−7](110)XRD3SEM[8−10]M42CMoWCrCMCM2C900~10002.2X27.6%14.5%2(1)Ms(2),Ms,341.5%201442444M42XRDFig.4XRDpatternsofM42highspeedsteeltreatedbydifferentquenchingmethods(a)and(b)isapartialenlargedviewofmartensite(110)γpeakin(a)2Table2ThecontentofretainedaustenitetreatedbydifferentquenchingmethodsContentofretainedausteniteQuenchingmethodsQuenchedalloyTemperedalloySand-cooling7.61.4Fog-cooling8.31.5Oil-cooling13.71.6Water-cooling14.51.532.35M425401h3AFM5()5(a)150~200nm50~90nm4/s5(b)100~150nm20~59nm20/s5(c)50~90nm40~60nm35/s5(d)30~60nm33[11]M42[12−13]M4266(a)835HV788HV32(1)(2)(2)5401h36(b)192M422455M42Fig.5AFMimagesoftemperedM42highspeedsteel(a)Sand-quenchingandtempering;(b)Fog-quenchingandtempering;(c)Oil-quenchingandtempering;(d)Water-quenchingandtempering2(1)M2CMC[14](2)3,4945HV1002HV()6001h46(c)856HV924HV600(M6CM23C6)[15]41)M42Ms32)M42201442466M42Fig.6EffectofvariedquenchingmethodsonM42hardness(a)Quenching;(b)Tempering;(c)Redhardness150~200nm30~60nm3)M42835HV788HV945HV1002HV856HV924HVREFERENCES[1],,,.[J].,1999,30(1):67−70.LUBin,ZHANGSi-qi,LIANGYing,etal.Theeffectofquenchingprocessonthestructureandpropertyofthebimetalsaw[J].JournalofCentralSouthUniversityofTechnology(NaturalScience),1999,30(1):67−70.[2],,,.[J].(),1995,26(3):369−372.ZHANGSi-qi,LUBin,SHENJian,etal.Effectofloadonthelifetimeandfracturebehaviorofbimetalcompositesawblade[J].JournalofCentralSouthUniversityofTechnology(NaturalScience),1995,26(3):369−372.[3]SARWARM,PERSSONM,HELLBERGHH.Wearandfailuremodesinthebandsawingoperationwhencuttingball-bearingsteel[J].Wear,2005,259(7):1144−1150.[4]EIRakaybyAM,MillsB.TemperingandsecondaryhardeningofM42high-speedsteel[J].MaterialsScienceandTechnology,1986,2(2):175−180.[5],,,.M42[J].,2009,24(2):22−26.BAIXin-ge,LIUChang-jun,YANSheng,etal.EffectofQuenchedGrainSizeandTemperedCarbideonWearabilityofM42High-speedSteel[J].HeatTreatment,2009,24(2):22−26.[6]TYSHCHENKOAI,THEISENW,OPPENKOWSKIA,etal.Low-temperaturemartensitictransformationanddeepcryogenictreatmentofatoolsteel[J].MaterialsScienceandEngineering:A,2010,527(26):7027−7039.[7],.:X[J].,2000,21(2):68−77.LIUXiao,KangMo-kuang.Latticeparametervariationwithcarboncontentofmartensite:X-Raydiffractionexperimentalstudy[J].TransactionsofMetalHeatTreatment,2000,21(2):68−77.[8],,,.T91[J].,2012,17(5):634−638.WANGFu-jing,YIDan-qing,WANGBin,etal.Effectofcoolingmethodonmicrostructureandpropertiesofhigh-alloy-castingsteelT91[J].MaterialsScienceandEngineeringofPowderMetallurgy,2012,17(5):634−638.[9]COLAÇOR,GORDOE,RUIZ-NAVASEM,etal.Acomparativestudyofthewearbehaviourofsinteredandlaser192M42247surfacemeltedAISIM42highspeedsteeldilutedwithiron[J].Wear,2006,260(9):949−956.[10]HETZNERDW.RefiningcarbidesizedistributionsinM1highspeedsteelbyprocessingandalloying[J].MaterialsCharacterization,2001,46(2):175−182.[11],,.[J].,1985,5:001.FUChan-pu,LUOQi-wen,WANGQing-tong.Influenceofquenchingtemperatureanddoubletemperingatlowerandhighertemperaturesonthemechanicalpropertiesofhighspeedsteel[J].HeatTreatmento