6系铝合金的挤压粗晶环

331Vol．33No．120123SHANGHAINONFERROUSMETALSMarch20121005－2046201201－0016－042011-10-121965-。[e-mail]。6215300。Cr。。6TG379AExtrusion6SeriesAluminumAlloywithPeripheralCoarseGrainLIWei-weiZHANGJin-hongKunshanGiantLightMetalTechnologyCo．Ltd．Kunshan215300ChinaAbstractInordertounderstandaluminumalloyssurfacestatussourceofcoarsegrainafterextrusionasmallbatchoftestisundertakenthroughthecontrolledparameters．Inordertoknowtheeffectsofprocessingandthechemicalcompositionofproductsweobservedthemicrostructureusingmicroscopy．ItwasobservedthatdecreasingrecrystallisationinhibitedtheamountofelementssuchasCrincreasingextrusionratioandspeedincreasethedepthofperipheralcoarsegrain．Basedontheevolutionofextrusionmicrostructurethemechanismofgenerateperipheralcoarsegrainonsurfaceofproductsispresented．Keywords6seriesaluminumalloyperipheralcoarsegrainrecrystallisationextrusionratioextrusionspeed0、、。。。、。。-。“”、15°。。161716061AA6061。Cr∶Mn1∶1Cr∶Mn2∶1。555℃3h16．8℃/h。1。60s。1/℃/mm·s－16061Cr4004821．32．620406061Cr4004821．32．62040。260611。β-AlFeSiα-AlFeSiCrCrAlMnCrSi1μm2。160612AlMnCrSi3a3b3c。4。。5a、b。2～5mm。1/2“”5a、b。6a。1/26b。3。。36061183315°1μm。。1619、。7。、。741。2CrMn、。3。1SahaPralp．AluminiumExtrusionTechnologyM．OhioASM．International200020-25．2DuanXetal．TheInfluenceofDieShapeontheBehaviorofSurfaceRecrystallijation2003TMSAnnualMeetingC．SanDiegoCalifornia200399-108．3SheppardTetal．EffectofProcessParametersonStructureandPropertiesofAl-5Mg-0．8MnAlloyAA5456J．MetalsTechnology1981319．4YamagataH．DynamicRecrystallizationandDynamicRecoveryinPureAluminiumat583KJ．ActMaterialia1995432檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪723-729．15360℃、3h、1．62．0。4。1．J．200230311-13．2．J．20053368-11．3．J．200115226-29．4．J．200456489-91．5．J．2011282130-135．6．1037692P．1989．7．J．1999303252-254．8．J．199616333-39．9．D．2011．10．、、、J．1998417-21．