热处理温度对45CrNiMoVA钢性能的影响

-PTCA(PART:APHYS.TEST.)200743545CrNiMoVA1,2,1,1(1.,264003;2.,014033):45CrNiMoVA,,,,45CrNiMoVA,,1350:45CrNiMoVA;;;:TG142.41:A:100124012(2007)0520221203THEINFLUENCEOFHEATTREATMENTTEMPERATUREON45CrNiMoVASTEELPROPERTIESLBXiao2chun1,LIYu2hai2,WANGYue2qi1,XUHong2yan1(1.YantaiBranchofNo.52ndResearchInstituteofWeaponindustryinChina,Yantai264003,China;2.ProcessTechnologyCentreofoneengineGroupinInnerMongolia,Baotou014033,China)Abstract:Conventionalmechanicalpropertyandfracturetoughnessofthe45CrNiMoVAsteelconductedbydifferentquenchingandequaltempertemperaturewerestudied.Themechanismofthequenchingtemperatureaffectedonitspropertieswereanalysedbysurveyingmechanicalpropertiesandfracturetoughnessandbyviewingfracturesurfaceunderscanningelectronmicroscope.Itwasshownthatthequenchingtemperaturehasnotanyeffecton45CrNiMoVAsteelyieldandtensilestrengthandhardnessindefinitetemperature,butthematerialfracturefacecontractionandelongationrateandimpactworkisverysensitivitytoquenchingtemperature,1350quenchingmaymaketensilestrengthdrop.Keywords:45CrNiMoVAsteel;Quenchingtemperature;Mechanicalproperty;Micro2analysis45CrNiMoVA,,,,[1],,,,,:2006203206:(1957-),,1850,975,1100,12251350(),180(3),GB/T228-2002,10mm,Instron1251GB/T230.1-2004GB/T229-1994GB/T4161-1984VInstron1251,20mm40mm160mm122-:45CrNiMoVA522.11,21,8501100,RP0.2,1100,,1350,,1,8501225,Rm,1225,Rm2,,1Fig.1Theinfluenceofquenchingtemperatureonyieldstrengthandtensilestrength2Fig.2Theinfluenceofquenchingtemperatureonelongationandfracturesurfacecontractioncoefficient2.233,,,975,3Fig.3Theinfluenceofquenchingtemperatureonhardnessandfracturetoughness2.34,4,,,,12251350,4Fig.4Theinfluenceofquenchingtemperatureonimpactwork2.4KIC3,3,KIC,850975,9751225,122513502.58501350(180),SEM5,,5ad500,,5e505,850,,,1350,222-:45CrNiMoVA3,(24),,,,,,,(13),,1225(a)850500(b)970500(c)1100500(d)1225500(e)1350505Fig.5Themicrofractureappearanceofspecimenswithdifferentquenchingtemperaturesprocess,,1,8501225,,1225,1350,,5,1225,,,1225,,,,,,,,,KIC,5a5b,,5a5b,(265)322-:XM=92,/9sin2(18)KX,MPa/();M2,sin2XK,-45+452,,2,sin2,M,sin2X,3XX(10)Voigt(1/2)S2S1,(7)(8)EE,X,X,X,X(10)X(1/2)S(hkl)2S(hkl)1,(hkl)X(17)K=[(1/2)S(hkl)2](-1/2)cot0(/180)(19)X(X),XX,,K,(211),XK-318MPa/()XX[1]:[1]EigenmannB,MacherauchE.Roentgenographischeuntersuchungvonspannugszustaendeninwerkstoffen(teil3)[J].Mat2wissUWerkstofftechnik,1996,27:427-431.:,(223),5a,,KIC[2]5b5a,,,,KIC,970KIC8505b,5c5d,KIC,1350,,,1350,KIC,45CrNiMoVA,,,,,,,4,45CrNiMoVA,1350,,:[1].[M].:,1994.[2].[M].:,1989.562