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EffectofSphericalCastTungstenCarbideParticlesonMicrostructure

andWearResistanceofSurfacingLayer

WANGLei,LIUXin,XIEHuanwen,ZOULiming,CAIYixiang

(GuangdongInstituteofMaterialsandProcessing,GuangdongAcademyofSciences,Guangzhou£µ£±£°£¶£µ£°,China)

Abstract:Thesphericalcasttungstencarbideparticleswithdifferentcontentsandparticlesizeswasmixed

withatomizedFepowdertopreparesurfacingelectrodes£®ThesurfacinglayeronQ£²£³£µsteelsubstratewasobtained

usingoxygen£Çacetyleneflamesurfacing£®Theeffectofcontentandparticlesizeofsphericalcasttungstencarbideon

themicrostructure,hardnessandwearresistanceofsurfacinglayerwasinvestigated£®Theresultsshowthatthere

wasanobviousmeltingphenomenonattheedgesofsphericalcasttungstencarbideinsurfacinglayer£®Thesmaller

theparticlesizeofsphericalcasttungstencarbidewas,themoreobviousthemeltingphenomenonwas£®Thefish£Ç

boneledeburitedecreased withdecreaseofsphericalcasttungstencarbideparticlescontent,andtheledeburite

becamecoarserwithreductionofparticlesizeofsphericalcasttungstencarbide£®Themoresphericalcasttungsten

carbideparticlescontentwas,andthesmallerparticlesizewas,thehigherthehardnesswasandthebetterthewear

resistanceofsurfacinglayerwas£®

Keywords:sphericalcasttungstencarbide;surfacelayer;microstructure;wearresistance

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