泡沫铝真空钎焊工艺研究(英文)

泡沫铝真空钎焊工艺研究(英文)Research on Vacuum Brazing Technology of Foamed AluminumAbstract:Vacuum brazing is a

() 泡沫铝真空钎焊工艺研究英文 ResearchonVacuumBrazingTechnologyofFoamed Aluminum Abstract: Vacuumbrazingisacommonlyusedweldingtechnologyin theaerospace,automotive,andelectronicsindustries.Foamed aluminumisanewtypeoflightmaterialwithexcellentproperties, whichhasgreatpotentialapplicationsinvariousfields.Inthis study,thevacuumbrazingprocessoffoamedaluminumwas investigated,andtheeffectsofbrazingtemperature,holdingtime, andsurfacetreatmentonthebrazingqualitywereanalyzed.The resultsshowedthatasuitabletemperatureandholdingtimewere criticaltoachieveasoundjoint.Surfacetreatmentsuchas degreasingandacidwashingcouldimprovethewettabilityofthe brazingfillermetalonthefoamedaluminumsurface.The microstructuresandmechanicalpropertiesofthebrazedjoints werecharacterizedbyscanningelectronmicroscopyandtensile tests.Thefindingsofthisstudycouldprovideguidanceforthe developmentandapplicationoffoamedaluminumproducts. Keywords:Foamedaluminum,Vacuumbrazing,Brazing temperature,Holdingtime,Surfacetreatment 1.Introduction Foamedaluminumisanewtypeofporousmaterialwithlow density,highspecificstrength,andexcellentenergyabsorption capability.Ithasgreatpotentialapplicationsinthefieldsof aerospace,transportation,construction,andsportsequipment. Vacuumbrazingisawidelyusedjoiningprocessinthese industriesduetoitsadvantagesofsmalldeformation,lowheat input,andprecisecontrolofthejointquality.However,the brazingoffoamedaluminumisacomplexprocessbecauseofthe specialfeaturesofthematerial,suchaslowthermalconductivity, surfaceroughness,andsurfaceporosity.Therefore,the optimizationoftheweldingparametersandsurfacetreatmentis criticaltoachievingahigh-qualitybrazedjoint. 2.Materialsandmethods Thefoamedaluminumusedinthisstudywasproducedby themeltstirringmethod.Thecellsizewasabout1mm,andthe