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等离子堆焊碳化钨强化镍基合金组织与性能研究.docx

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等离子堆焊碳化钨强化镍基合金组织与性能研究 Abstract Plasmaarcweldingisawidelyusedweldingprocessinthemanufacturingindustryduetoitsadvantagesofhighweldingspeed,deeppenetration,andgoodweldingquality.Inthisstudy,aninvestigationwascarriedoutonthemicrostructureandpropertiesofatungstencarbidereinforcednickel-basedalloyfabricatedbyplasmaarcwelding.Theresultsindicatethatthereinforcedalloyhasauniquemicrostructure,showingauniformdistributionoftungstencarbideparticleswithinthenickel-basedmatrix.Furthermore,theadditionoftungstencarbideimprovesthewearresistanceandhardnessofthereinforcedalloy.Theconventionaltensiletestandhardnesstestshowthatthereinforcedalloyhasahigherstrengthandhardnessthanthebasematerial.Thisstudyprovidesatheoreticalbasisfortheapplicationoftungstencarbidereinforcednickel-basedalloysinthefieldofhighwear-resistantmaterials. Keywords:plasmaarcwelding;tungstencarbide;nickel-basedalloy;microstructure;properties Introduction Nickel-basedalloyshaveexcellentmechanicalproperties,corrosionresistance,andhigh-temperatureperformance,whichmakethemwidelyusedinvariousfields,suchasaerospace,petrochemical,andnuclearindustries.However,thesealloysstillhavelimitationsintermsofwearresistance,whichlimitstheiruseinhigh-wearenvironments.Toovercometheselimitations,researchershavedevelopedvariousmethodstoimprovethewearresistanceofnickel-basedalloys,includingcompositematerialtechnology. Tungstencarbideisahard,wear-resistantmaterialthatcanbeusedasareinforcingphasetoimprovethewearresistanceofnickel-basedalloys.Thetungstencarbidereinforcednickel-basedalloyhastheadvantagesofhighhardness,highwearresistance,andexcellentresistancetooxidationandcorrosion.Plasmaarcweldingisasuitableprocessforthefabricationoftungstencarbidereinforcednickel-basedalloysduetoitshigh-energyconcentrationanddeeppenetrationability. Thepurposeofthisstudyistoinvestigatethemicrostructureandpropertiesofatungstencarbidereinforcednickel-basedalloyfabricatedbyplasmaarcwelding.Thestudyaimstoprovideatheoreticalbasisfortheapplicationoftungstencarbiderei