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Cr、Sn对灰铸铁组织和性能的影响及应用.docx

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Cr、Sn对灰铸铁组织和性能的影响及应用 Abstract Greycastironisawidelyusedmaterialintheindustryowingtoitsgoodmechanicalproperties,excellentwearresistance,andlowcost.DifferentalloyingelementsamongwhichCrandSnarecommonlyusedingreycastirontoimproveitsmechanicalproperties.Inthispaper,wewilldiscusstheeffectsofCrandSnongreycastiron'smicrostructure,mechanicalproperties,andapplications.TheresultsshowedthattheadditionofCrandSncansignificantlyimprovethemechanicalpropertiesofgreycastiron,especiallythewearresistance.Furthermore,CrandSncanalsorefinethegraphiteflakesandpearlite,enhancethehardness,andimprovecorrosionresistance.Therefore,CrandSnarewidelyusedalloyingelementsinthegreycastironindustry. Keywords:Greycastiron,Cr,Sn,mechanicalproperties,alloyingelements. Introduction Greycastironisatypeofcastironthatcontainsgraphiteflakesinitsmicrostructure.Itschemicalcompositiontypicallyincludescarbon(2%-4%),silicon(1%-3%),andsmallamountsofsulfur,manganese,andphosphorus.Greycastironiswidelyusedinmanyindustriesowingtoitsgoodcastingperformanceandexcellentmechanicalpropertiessuchaswearresistance,gooddampingcapacity,andhighthermalconductivity.Still,itsmechanicalpropertiescanbeimprovedthroughtheadditionofalloyingelements. Chromium(Cr)andtin(Sn)areamongthemostcommonlyusedalloyingelementsingreycastiron,duetotheirvariousbenefits.ThispaperaimstodiscusstheimpactofChromiumandTinonthemicrostructureandmechanicalpropertiesofgreycastiron.Thepaperalsohighlightstheapplicationsofthesetwoelementsintheindustry. EffectofCronGreyCastIron Cristypicallyaddedtogreycastironasferrochrome,whichisahigh-carbonalloycontaining60%-70%CrandtherestFe.TheadditionofCrtogreycastironimprovesthewearresistanceandcorrosionresistanceaswellashardnessofthematerial.TheeffectsofCronthemicrostructureandmechanicalpropertiesofgreycastironarediscussedindetailbelow: Microstructure TheadditionofCrtogreycastironchangesthemorphologyofgraphiteflakesfromsharptorounder,resultinginimprovedmechanicalproperties.Theroundergraphiteflakescontributetoalowersurfaceareaa