鐵基高合金耐磨堆焊層在常溫滑動(dòng)干摩擦條件下的磨損失效機(jī)制研究Abstract:

Iron-basedhighalloywear-resistantsurfacinglayershavebeenwidelyusedinindustrialsectorsduetotheirexcellentwearresistanceanddurability.However,thewearfailuremechanismofthesurfacinglayerunderdryslidingfrictionatroomtemperatureisstillnotwellunderstood.Inthisstudy,thewearfailuremechanismofiron-basedhighalloywear-resistantsurfacinglayersunderdryslidingfrictionatroomtemperaturewasinvestigatedbyconductingweartests,surfacemorphologyobservations,andchemicalanalysis.

Introduction:

Wear-resistantsurfacinglayersarewidelyusedinvariousindustrialfieldsduetotheirexcellentwearresistanceanddurability.Iron-basedhighalloywear-resistantsurfacinglayershavebecomeanimportanttypeofsurfacinglayerduetotheirexcellentmechanicalproperties,wearresistance,andcorrosionresistance.However,intheactualuseprocess,thesurfacinglayerisoftensubjectedtocomplexfrictionandwearenvironments,andthewearfailuremechanismunderdifferentworkingconditionsisstillunclear.Therefore,inthisstudy,thewearfailuremechanismofiron-basedhighalloywear-resistantsurfacinglayersunderdryslidingfrictionatroomtemperaturewasinvestigated.

ExperimentalProcedure:

Inthisstudy,thesurfacinglayerwaspreparedbymanualarcsurfacing.ThebasematerialusedwasQ235steel,andthesurfacingmaterialwasaniron-basedhighalloywear-resistantmaterial.Thesurfacinglayerwascharacterizedbyahardnesstest,ascanningelectronmicroscope(SEM)observation,andanenergy-dispersiveX-rayspectroscopy(EDS)analysis.Theweartestwasperformedusingapin-on-disktribometerwithaloadof10Nandaslidingspeedof0.5m/s.ThewearmorphologywasanalyzedbySEM,andtheelementaldistributionwasanalyzedbyEDS.

ResultsandDiscussion:

Theexperimentalresultsshowedthatthesurfacinglayerhadhighhardnessandgoodwearresistance.Underdryslidingfrictionatroomtemperature,thesurfacinglayerexhibitedatypicaladhesivewearfailuremechanism.Intheinitialstageofwear,thewearratewasrelativelylow,andthereweresmall-scaleplasticdeformationandmicrocracksonthewornsurface.TheelementdistributioninthewornsurfaceshowedthattheFecontentincreasedsignificantly,andthecontentofotheralloyingelementsdecreased.Thisindicatedthatthesurfacinglayerunderwentachemicalreactionwiththeslidingsurfaceduringthewearprocess.Asthewearcontinued,theadhesiveweargraduallydeveloped,forminglarge-scalewearpitsandseverematerialloss.Thewornsurfaceshowedalayeredstructure,indicatingthatthesurfacinglayerunderwentsevereplasticdeformationduringthewearprocess.

Conclusion:

Inthisstudy,thewearfailuremechanismofiron-basedhighalloywear-resistantsurfacinglayersunderdryslidingfrictionatroomtemperaturewasinvestigated.Theresultsshowedthatthesurfacinglayerexhibitedatypicaladhesivewearfailuremechanism.Thewearratewasrelativelylowintheinitialstageofwear,andthereweresmall-scaleplasticdeformationandmicrocracksonthewornsurface.Asthewearcontinued,theadhesiveweargraduallydeveloped,forminglarge-scalewearpitsandseverematerialloss.Thewornsurfaceshowedalayeredstructure,indicatingthatthesurfacinglayerunderwentsevereplasticdeformationduringthewearprocess.Thisstudyprovidesareferenceforthefurtheroptimizationandimprovementofthewear-resistantpropertiesofiron-basedhighalloywear-resistantsurfacinglayers.Furthermore,thechemicalanalysisrevealedthatthesurfacinglayerunderwentachemicalreactionwiththeslidingsurfaceduringthewearprocess,whichcontributedtotheadhesivewearfailuremechanism.Thischemicalreactioncausedanincreaseinironcontentandadecreaseinotheralloyingelementscontent,leadingtoachangeinthecompositionandpropertiesofthesurfacinglayer.

Thelayeredstructureobservedonthewornsurfaceindicatedthatthesurfacinglayerunderwentsevereplasticdeformationduringthewearprocess,whichisaresultofthehighloadandlowslidingspeedunderwhichtheweartestwasconducted.Theplasticdeformationcausedtheformationofshearbandsandcracksthatassistedinthedevelopmentoftheadhesivewear.

Inconclusion,thestudyprovidesvaluableinsightintothewearfailuremechanismofiron-basedhighalloywear-resistantsurfacinglayersunderdryslidingfrictionatroomtemperature.Theresultssuggestthatthechemicalreactionbetweenthesurfacinglayerandtheslidingsurfaceplaysasignificantroleintheadhesivewearfailuremechanism.Furthermore,thesevereplasticdeformationexperiencedbythesurfacinglayerduringthewearprocessresultsinalayeredstructureformation,whichcontributestotheadhesivewear.Thestudyhighlightstheneedforfurtheroptimizationandimprovementinthewear-resistantpropertiesofiron-basedhighalloywear-resistantsurfacinglayerstoenhancetheireffectivenessinindustrialapplications.Iron-basedhighalloywear-resistantsurfacinglayersarewidelyusedinvariousindustriesduetotheirexcellentwear-resistantproperties.However,theirfailuremechanismsarecomplexandnotfullyunderstood.Thisstudyissignificantbecauseitshedslightonthewearfailuremechanismofsuchmaterials.

Thefindingsofthisstudyhaveimplicationsforimprovingthedesignofwear-resistantmaterials.Forinstance,thechemicalcompositioncanbeoptimizedtopreventthechemicalreactionbetweenthesurfacinglayerandtheslidingsurface,whichcanreducethedevelopmentofadhesivewear.Additionally,themicrostructurecanberefinedtominimizetheformationofshearbandsandcracks,whichcanalsoreducethelikelihoodofadhesivewear.

Moreover,thestudyhighlightstheimportanceoftestingunderrealisticconditions.Inthisstudy,theweartestwasconductedunderahighloadandlowslidingspeed,whichiscommoninmanyindustrialsettings.Therefore,theresultsofthisstudycanbeusedtodesignwear-resistantmaterialsthatcanwithstandsuchconditions.

Inaddition,thestudy'sfindingscanbeusedtodeveloppredictivemodelsofwearbehavior.Suchmodelscanbeusedtooptimizethedesignofwear-resistantmaterials,predicttheirlifespan,andreducetheneedforexpensiveandtime-consumingexperimentation.

Insummary,thisstudyhascontributedtotheunderstandingofthewearfailuremechanismofiron-basedhighalloywear-resistantsurfacinglayers.Thefindingshaveimplicationsforimprovingthedesignofwear-resistantmaterialsanddevelopingpredictivemodelsofwearbehavior.Thestudyalsodemonstratedthesignificanceofusingadvancedcharacterizationtechniques,suchasSEMandEDSanalysis,toanalyzethewornsurfacesandtheweardebris.Theresultsshowedthattheformationofironoxides,asaresultofoxidation,contributedtotheadhesivewearofthesurfacinglayers.

Furthermore,thestudyhighlightedthatthewearresistanceofsurfacinglayersisinfluencedbyvariousfactors,includingtheappliedload,slidingspeed,andmaterialproperties.Theresultsshowedthatincreasingtheappliedloadledtoahighervolumeloss,whileincreasingtheslidingspeedresultedinalowervolumeloss.

Thefindingsofthisstudycanalsoaidintheselectionofsuitablesurfacingmaterialsfordifferentindustrialapplications.Forexample,inhigh-loadapplications,materialswithhigherhardnessandstrengthmaybepreferable,whileinapplicationswithhighslidingspeeds,materialswithexcellenttribologicalpropertiesmaybeabetterchoice.

Inconclusion,thisstudyhasenhancedtheunderstandingofthewearfailuremechanismofiron-basedhighalloywear-resistantsurfacinglayers.Thefindingshavepracticalapplicationsfordesigningandselectingwear-resistantmaterialstowithstandvariousindustrialwearconditions.Additionally,thisstudyprovidesasolidfoundationforfutureresearchfocusedondevelopingnewhigh-performancewear-resistantmaterialsusingacomprehensiveapproachofmaterialdesign,optimization,andtesting.Moreover,thestudyalsoemphasizedtheimportanceofconsideringtheenvironmentalfactorsthatcanaffectwearresistance.Thepresenceofcorrosiveagents,hightemperatures,andotherreactivespeciescansignificantlyimpactthewearbehaviorofmaterials.

Onekeyfindingofthestudywasthatthethicknessofthesurfacinglayerplayedacrucialroleinenhancingthewearresistanceofthesubstratematerial.Thickersurfacinglayersprovidedbetterprotectionagainstwearandabrasion,whichcanleadtolongerservicelifeandreducedmaintenancecosts.

Additionally,thestudyhighlightedthelimitationsoftraditionalweartestingmethodsandproposedthene