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简述工艺参数对激光熔覆的影响.docx

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简述工艺参数对激光熔覆的影响 Title:TheInfluenceofProcessParametersonLaserCladding Abstract: Lasercladdingisanadvancedsurfacemodificationtechniquethatinvolvesmeltingandsolidifyingmetallicpowdersontothesurfaceofasubstrateusingahigh-energylaserbeam.Theprocessparametersplayacrucialroleindeterminingthequality,efficiency,andoverallperformanceofthelasercladdingprocess.Thispaperaimstoprovideanoverviewoftheinfluenceofvariousprocessparametersonlasercladding,includinglaserpower,scanningspeed,powderfeedrate,powdertype,andsubstratematerial. 1.Introduction Lasercladdingiswidelyusedinindustriessuchasaerospace,automotive,andoilandgasforenhancingthemechanicalpropertiesandsurfacecharacteristicsofmaterials.Thistechniqueoffersnumerousadvantages,includinghighprecision,minimaldistortion,andtheabilitytocreatecomplexgeometries.However,achievingasuccessfullasercladdingprocessrequirescarefuloptimizationofprocessparameters. 2.LaserPower Laserpowerisoneofthemajorprocessparametersthatsignificantlyinfluencethelasercladdingprocess.Theenergydensitydeliveredbythelaserbeamaffectsthedepthofpenetration,heatdistribution,andmicrostructureofthecladlayer.Higherlaserpowerleadstodeeperpenetrationbutalsoincreasestheriskofdefectssuchasporosityandcracking.Theselectionoflaserpowershouldconsiderthedesiredcladlayerthicknessandthemeltingcharacteristicsofthepowdermaterial. 3.ScanningSpeed Scanningspeedplaysacrucialroleinthelasercladdingprocessasitdeterminestheheatinputandthecoolingrateduringsolidification.Higherscanningspeedsresultinfastercoolingratesandfinermicrostructures.However,highscanningspeedsmaylowerthebondingstrengthbetweenthecladlayerandthesubstrate.Theoptimizationofscanningspeedisnecessarytoachievethedesiredcladlayerqualityandproperties. 4.PowderFeedRate Thepowderfeedrateimpactsthedepositionrateandthedilutionlevelbetweenthepowdermaterialandthesubstrate.Higherpowderfeedratesincreasethedepositionrate,butexcessivepowderfeedratescanleadtopowderblowout,incompletemelting,andpoorbonding.Additionally,thepowderfeedratealsoaffe