5052铝合金换热器封头体焊缝裂纹的处理

:100321545(2005)01200332035052(,475002):5052,5052,,:;;TIG;:TG457.5:A:2004207207,,,100%X,JB4730294,,X,,,,,11,,123,10mm505222.1,,99.9%,,,,,GB/T484221995,0.5MPa12.2(1),,,,,(2)3050mm,,Al2O3,Al2O3,1.4,33201,,,,,,(3)(4)2.3,V,2mm,2mm23,221,,1501GTAWGTAWGTAWGTAWACACACACArArArAr/A220280220280220280180240LF11LF11LF11LF11/mm5554/Lmin211214121412141214/mm55552.4,100%X,,10mm,(3)335052,,,,,,,,,,,,,5052,,X4320052,,,,,,,1,ab,bcb,,,5052,,,abc,abbc,b,,,45052,,6X,,,,,,5052PreventionofWeldCracksinHeatExchangerHeadof5052AlumiumAlloyWUGuo2feng(KaifengAirSeparatorGroupCo.Ltd,Kaifeng475002,China)Abstract:Basedontheanalysisandobservationoffusionweldingprocessof5052alumiumalloy,thecausesofweldcracksintheheatexchangerheadofthealloyareinvestigatedandefficientmeasuresareadoptedfortheweldingquality.Keywords:Heatexchangerhead;Alumiumalloy;TIGwelding;Crack(15)[5].[R].:,1990.[6],.[J].,1996(4):1619.[7]ZavattieriPD,EspinosaHD.Grainlevelanalysisofcrackinitiationandpropagationinbrittlematerials[J].ActaMaterialia,2001,49(20):42914311.[8]QiuH,MoriH,EnokiM,etal.Fracturemechanismandtoughnessoftheweldingheat2affectedzoneinstructuralsteelunderstaticanddynamicloading[J].MetallurgicalandMaterialsTransactionsA,2000,31A(11):27852791.[9].Cr12[J].,1990(6):69.SpheroidizingMechanismandPracticeofEutecticCarbidesinLowTungstenWhiteCastIronFUDing2mei(CentralResearchInstituteofBuildingandConstruction,MCCGroup,Beijing100088,China)Abstract:TheinfluenceofmodificationwithCe,KandNaonthestructureandthepropertiesoftungstenalloywhitecastiron(TAWCI)wasinvestigated.TheresultshowsthatthemorphologyofeutecticcarbidesischangedintospheroiditeundernormalheattreatmentconditionandthemechanicalpropertiesespeciallytheimpacttounghnessofTAWCIareimproved,sotheresis2tancetoimpactwearisincreasedobviously.Keywords:Whitecastiron;Carbide;Spheroidizing;Modification53201:5052