摘要
Carbidesinaseriesofcold-weldingweldmetalswerestudiedbymeansofSEM,TEMandEPMA,andtheformingmechanismofcarbidewasproposedaccordingtotheirdistributionandmorphology.Duetotheirdifferentcarbide-formingtendency,NbandTicouldcombinewithCtoformparticulatecarbideinliquidweldmetalanddepletedthecarboncontentinmatrix,whileVinducedthecarbideprecipitatedalonggrainboundary.ButtoomuchNborTialoneresultedincoarsecarbideandpoorstrengthenedmatrix.WhensuitableamountofNb,TiandVcoexistedinweldmetal,bothuniformlydistributedparticulatecarbideandwellstrengthenedmatrixcouldbeachieved.Itwasproposedthatthecarbidenucleatedontheoxidewhichdispersedinliquidweldmetal,andthengrewintomulti-layercomplexcarbideparticlesbyepitaxialgrowth.Atdifferentsites,carbideparticlesmaypresentasdifferentmorphologies.
出版日期
2004年06月16日（中国期刊网平台首次上网日期，不代表论文的发表时间）
