热处理工艺对6061铝合金显微组织及力学性能的影响

©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(2010)022001520360611,2,1,2,1,2,1,2(1.,730050;2.,730050):420450490530570,6h,173,123456h,6061.MEF23EMPA21600,.:6061,Mg2Si,530,6h,173,3h.:;6061;;;:TG146:AInfluenceofheattreatmentonmicrostructureandmechanicalpropertiesof6061aluminumalloyCHENJian2hong1,2,LIMing2e1,2,YUJiang2rui1,2,QIAOJi2sen1,2(1.StateKeyLaboratoryofGansuAdvancedNonferrousMetalMaterials,LanzhouUniv.ofTech.,Lanzhou730050,China;2.KeyLabo2ratoryofNonferrousMetalAlloys,TheMinistryofEducation,LanzhouUniv.ofTech.,Lanzhou730050,China)Abstract:Solutionheatandagingtreatmentof6061aluminumalloywasconductedwhenthetemperaturefortheformerwasselectedas420,450,490,530,and570withheatpreservationfor6hours,andthetemperatureforthelatterwastakenas173withheatpreservationfor1,2,2,4,5,and6hours.Struc2turalobservationwasperformedwithMEF23metallographicmicroscope,compositionanalysiswithEM2PA21600electronicprobe,andhardnesstestwithHBRVU2187.5.Theinfluenceofsolutionheatandagingtreatmentonmicrostructureandmechanicalpropertiesofthealloywasanalyzedthereafter.Theresultshowedthatthetemperatureofsolutionheattreatmentandagingtimehaddefiniteinfluenceonthemicro2structureofthe6061aluminumalloy,agreatamountofhomogeneousMg2Sistrengthenedphasecouldbeobtainedaftersolutionheatandagingtreatment,andahighercomprehensivemechanicalpropertywouldbeachievedwhenthetemperatureofsolutionheattreatmentwas530withheatpreservationof6hoursandagingtemperaturewas173with3hheatpreservation.Keywords:heattreatment;6061aluminumalloy;solutionheatandagingtreatment;microstructure;mechanicalproperty6061Al2Mg2Si,,,[1].,():2009210212:(2007GS00685):(19372),,,.[2],,[326].,6061.6061,.36220104JournalofLanzhouUniversityofTechnologyVol.36No.2Apr.2010©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:420450490530570,6h,.530570,123456h,173,..350#600#800#1000#1200#1500#,10%HClO4,2315180.MEF23,20106061EMPA216005306h+1733h57016061Tab.1Mass2fractioncompositionofthe6061aluminumalloy%AlSiFeCuMnMgCrZnTi97.010.580.410.300.151.00.300.200.056h+1733h,HBRVU2187.5,5,.22.11,2490530570.1,,(606142.86HRB),530,.490(2a)530(2b),570(2c),,530.1Fig.1Hardnessvalueatdifferenttemperaturesofsolu2tionheattreatmentforidenticalagingtime(a)490(b)530(c)5702Fig.2Metallographicmicrostructuresof6061aluminumalloyafterdifferentsolutionheattreatment36061,6061Mg2Si,Al2Cu,Mg2Si,Al2Cu.45306h+1733h5706h+1733h.,6061Mg2Si5306h+1733h,,;36061Fig.3Strengthenedphasepatternof6061aluminumalloy6136©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(a)530Mg2Si(b)570Mg2Si4Fig.4Analysiswithelectronprobe5706h+1733h,Mg2Si,.2.2,(),,,,,[729].5,,3h,.6530,234h,,.5Fig.5Hardnessvalueaftersolutionheatandagingtreat2mentatidenticalsolutiontemperatureandfordif2ferentagingtime(a)5306h+1732h(b)5306h+1733h(c)5306h+1734h6Fig.6Metallographicmicrostructureof6061aluminumalloyafteragingtreatmentwithdifferentagingtime36061,.Mg2Si,,Mg2Si,.,530,6h,173,3h.:[1],,,.6061[J].,2008,34(2):27230.[2],,.[M].:,2006.[3].[M].:,1964.[4],,,.2618[J].,2008,18(6):4342436.[5],.ZA27[J].,1999,23(2):23227.[6],,.2618[J].,2001,16(2):13214.[7],,.2A12[J].,2008,27(5):59261.[8],,,.[J].,1998,20(5):33235.[9],,,.7XXX[J].,2009,23(6):1192124.712:6061