Liccoln WPHB - Section 09 (Welding Aluminum and Aluminum Alloys).pdf

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1、Section9WELDINGALUMINUMANDALUMINUMALLOYSSECTION9.1WELDABILITYOFALUMINUMANDALUMINUMALLOYSPageAlloyTypes..........................9.1-1HeatEffectsofWelding................9.1-1HotCrackingofWeldMetal...........9.1-2FillerMetalsforWeldingAluminumAlloys.9.1-3S

2、urfacePreparationforWelding..........9.1-5NeedforCleaning...................9.1-5ExamplesofCleaningProcedures.......9.1-6SECTION9.2WELDINGALUMINUMANDALUMINUMALLOYSWITHTHESHIELDEDMETAL-ARCPROCESSElectrodeSelection....................9.2-1Preheating........

3、...................9.2-1WeldingTechniques....................9.2-2SECTION9.3WELDINGALUMINUMANDALUMINUMALLOYSWITHTHEGASMETAL-ARCPROCESSProcessandEquipment.................9.3-1MaintainingGMAWeldQuality..........9.3-1InertGasesforGMAWelding...........9.3-6P

4、roceduresforGMAWelding............9.3-7SECTION9.4WELDINGALUMINUMANDALUMINUMALLOYSWITHTHEGASTUNGSTEN-ARCPROCESSGTAWeldingArcs...................9.4-1Alternating-CurrentGTAWelding.......9.4-2Direct-CurrentElectrodeNegativeGTAWelding......................9.4

5、-9Direct-CurrentElectrodePositiveGTAWelding......................9.4-109.1-1WeldabilityofAluminumandAluminumAlloys*ALLOYTYPESWroughtaluminumalloysaregenerallyproducedyieldstrengthsafter15to30daysofagingatroominfivebasiccategories:a)flatplateorsheet;b)temp

6、erature.Formabilityandcorrosionresistancerod,bar,orwire;c)tubing;d)extrudedshapes;andareexcellent.Thoughmoredifficulttoextrudethane)forgings.Aluminumalloysarefurtherclassified6061alloy,7039ismoreeasilyextrudedthan2014.asheattreatableandnon-heattreatable.T

7、hestrengthAlloy7005,anextrudableAIMnZnalloyintheofthenon-heattreatablealloysdependsupontheSeries,alsohasgoodweldability.solidsolutionstrengtheningofelementssuchasItissuggestedthatthedesignerdiscusspotentialsilicon,manganese,ironandmagnesium.Additionalappl

8、icationswithoneofthemajoraluminumsuppliersstrengtheningisachievedbyworkhardeningfrombeforedecisionismadeontheiruse.theformingprocesssuchascoldrolling.ExamplesThealuminum-magnesium-manganesealloys-ofnon-heattreatable