电火花沉积铁硼合金涂层的组织与性能研究

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中图分类号：TG177.4 文献标志码：A 文章编号：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

电火花沉积（Electro-SparkDeposition，ESD）是一种利用高能量密度的电能，沉积材料作为阳极，基体材料作为阴极，通过 100～2000Hz 频率发生火花放电作用，瞬间释放大量能量产生高温，熔化电极材料，把作为电极的导电材料直接沉积到金属工件表面，以获得与基体呈现冶金结合的涂层制备工艺。（剩余5456字）