摘要
Microstructureofthematrixdirectlyinfluencestheperformanceandtheapplicationofmetalmatrixcomposites.Byusingvacuumcasting-infiltrationmethodtomanufacturecastingtungstencarbideparticlereinforcedcomposite,theadditionofNicanalterthemicrostructureofthematrixofcomposite.Highcarbonchromiumsteelwaschosenasthesubstrate.Thecastingprocesswasachievedat1580℃withvacuumdegreeof0.072—0.078MPa.Paddingofthemoltensteelineachpartofthepreformwasdifferent,andthesolidificationofeachpartofthecompositewasdifferent,too.Microstructureofthematrixwasvariousindifferentpartsofthecomposite.TheNiadditionhadenlargedtheaustenitezoneinmatrix,whichwouldimprovethecorrosionresistanceofthecomposite.ThephaseidentificationofthecompositewasperformedbyX-raydiffractiontechnique.TheresultshowedthatFe3W3Cwastheprimaryprecipitatedcarbideanditscompositionhadadirectlinkwiththedecompositionofthecastingtungstencarbideparticles.Thehardnessofthematrixmainlydependedonthereinforcedcarbide,i.e.Fe3W3C.
出版日期
2013年08月18日（中国期刊网平台首次上网日期，不代表论文的发表时间）
