電火花沉積鐵硼合金涂層的組織與性能研究

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中圖分類號：TG177.4 文獻(xiàn)標(biāo)志碼：A 文章編號：1004-4345（2025）03-0017-04

AbstractIron-boron aloycoatings were preparedby electro-sparkdeposition usingFe-Ballyaselectrode material inboth argonandargon-fre atmospheresrespectively.Themirostructureandpropertisofthetwocoatingswerecomparativelyinvestigated via metallographicicroscopyscaingelectronmicroscopy（SEM），andphaseanalysis.Keyfidingssho：thecoatingingofree atmosphere exhibitedoughersufaces，andthecoating inargonatmosphereshoweddenser microstructuresandsmothersufaces，yet developedsurfacecracks.BothcoatingsprimarilycontainedFeBphase，along withsmallamountsofmartensitephaseandFe3Bphase. ArgonatmospherecansuppresthedecompositionofFe3Bphase，makingthecoatingpreparedinargonatmospherecontainmoreFe3B phase.The maximummicrohardnessofcoatingspreparedinargonandargon-freeatmospheresare1146HVand138HVrespectively indicatingbothatingangiicantlymproveteardessofsubsrateaterialuttdepositiotmoshressallifuc on coating hardness.

Keywords electro-spark deposition; Fe2B ; Fe-B alloys; hardness; coating

電火花沉積（Electro-SparkDeposition，ESD）是一種利用高能量密度的電能，沉積材料作為陽極，基體材料作為陰極，通過 100～2000Hz 頻率發(fā)生火花放電作用，瞬間釋放大量能量產(chǎn)生高溫，熔化電極材料，把作為電極的導(dǎo)電材料直接沉積到金屬工件表面，以獲得與基體呈現(xiàn)冶金結(jié)合的涂層制備工藝。（剩余5456字）