焊接方法对6061铝合金接头性能影响的研究

201200602　()JournalofJiangsuUniversityofScienceandTechnology(NaturalScienceEdition)　Vo1.20No.1Feb.2006　　　　　　:1673-4807(2006)01-0090-05焊接方法对6061铝合金接头性能影响的研究赵　勇,付　娟,张培磊,严　铿,蒋成禹(,212003)　:6061TIG、MIGFSW,3σbδ,,:,MIGTIG;,;TIG,,MIGTIG,FSWTIG,。:;;:TG457.14　　　　　　　　:AResearchonEffectofWeldingWaysonJointPerformanceofAluminumAlloyZHAOYong,FUJuan,ZHANGPeilei,YANKeng,JIANGChengyu(SchoolofMaterialsScienceandEng.,JiangsuUniversityofScienceandTechnology,ZhenjiangJiangsu212003,China)Abstract:Theperformancesof6061aluminumalloyjointsweldedwithTIG,MIGandFSWmethodarestudied.Theparametersσbandδaretestedaswellasthemicrostructureandfractographareanalyzed.ResultsshowthatthegeneralperformanceofFSWjointisbest.ThestrengthofMIGjointishigherthanthatofTIGjoint.ThegrainofFSWjointisfinerthanthatofbasemetal.Moreprecipitatescanbefoundinthegrainoffusionweldingjoints.ThecavitiesinthefractographofTIGjointareshallowerandthereissomesmoothplatformsimilartothequasi-cleavagecracknearthecavities.ThecavitiesoffracturebyMIGaredeeperthanthatbyTIG.ThecavitiesoffracturebyFSWaredeeperandsmallerthanthatbyTIG.Somesmallcavitiesgatherandformsomebigcavities.Keywords:aluminumalloy;weldingways;jointperformance0　　、、、,、。,、:2005-05-18:　(1978-),,,。。,[1]。(TIG)(MIG)。90,———FSW(FrictionStirWelding),。,FSW,、;FSW、、,,;,,[2-3]。6061,。1　1　6061Tab.1　Chemicalcompositionof6061aluminumalloySiFeCuMnMgZnCrTiZrAl60610.4～0.80.70.15～0.40.150.8～1.20.250.04～0.350.150.15　　6061Al-Mg-Si,,,,,、。6061+,4mm,1。TIGMIG5356。2　2.1　2.1.1　TIG,TIG,,。FroniusMAGICWAVE2600。,,w(He)70%w(Ar)30%,I140A,U16.7V,V8.2m/h。2.1.2　MIG,MIG,,。FroniusTPS4000/5000。,,I,w(He)70%w(Ar)30%,I=110A,U=20.8V,V=24m/h。2.1.3　FSWFSW-3LM。,,F1000r/min,V120mm/min,0.09mm。2.2　GB2649。,MIGTIG(),。2.3　MM6,3,。916　　　　　　　　　　　　:60612.4　6061(4mm),TIG,MIG,FSWJXA-840(SEM),。3　3.1　2　Tab.2　Mechanicalpropertiesofjointwithdifferentmethodsσb/MPaδ/%≥294≥8TIG1885.2MIG2237.1FSW2376.9　　GB2651《》。60612。2,6061,MIGTIG,FSW,81%。,,,,6061,,“”,,,,,Mg2Si,“”。6061TIG,,,,,。MIG,,,,TIG。,,,,,,,。3.2　:、、、、。,:5mlHF(48%)+10mlH2SO4+85mlH2O,30s。NikonEPIPHOT300,6061(4mm),1～4TIG,MIGFSW。1　TIG(200×)Fig.1　MicrostructureofweldingbyTIG(200×)2　MIG(200×)Fig.2　MicrostructureofweldingbyMIG(200×)92()20053　FSW(200×)Fig.3　MicrostructureofweldingbyFSW(200×)4　(200×)Fig.4　Microstructureofbasemetal(200×)　　,,,12TIGMIG,Mg2Si。,TIG,,。,。、、,,3。,,,,,,,,、,,[4-5]。3.3　6061(4mm),TIG,MIG,FSWJXA-840(SEM),。5～8TIG、MIG、FSW。,,,,。TIGMIG,,,TIG,,,,MIG,TIG。FSW5　Fig.5　Fractureofbasemetal6　TIGFig.6　FractureofjointbyTIG7　MIGFig.7　FractureofjointbyMIG8　FSWFig.8　FractureofjointbyFSWl936　　　　　　　　　　　　:6061,8,TIG,,TIG。4　　1)6061(4mm)3,237MPa,81%,6.9%,MIG,TIG(5.2%)。2),MIGTIG,。,。3),。3,,TIG,MIG,TIG;TIG,TIG。4),。:[1]　CM.[M].:,1988.[2]　.[J].,2003,23(11):37-40.[3]　,.[M].:,1995.[4]　CEDERQUISTL,REYNOLDSAP.Factorsaffectingthepropertiesoffrictionstirweldedaluminumlapjoints[J].Weld-ingResearchSupplement,2001,80(12):281-287.[5]　CHAOYJ,WANGY,MILLERKW.EffectoffrictionstirweldingondynamicpropertiesofAA2024-T3andAA7075-T7351[J].WeldingJournal,2001,80(8):196-200.(责任编辑:顾　琳)更正启事20055《》,,、,。(本刊编辑部)94()2005