摘要
Niobium,asthemosteffectivesecond-phaseformingelement,wasaddedintheFe-Cr13-C-Nhard-facingalloytogetcarbonitrideprecipitates.Morphologyandcompositionofcarbonitrideinthehardfacingalloywerestudiedbyopticalmicroscopy,scanningelectronmicroscopy,andelectronprobemicroanalyzer.Thether-modynamicsandtheeffectonthematrixoftheformationofcarbonitridewerealsodiscussed.ItwasfoundthatniobiumcarbonitridesarecomplexNb(C,N)precipitatedistributedongrainboundaryandmatrixofthehardfacingalloy.Underas-weldedcondition,primarycarbonitrideparticleswerereadilyprecipitatedfromthehardfacingalloywithlargesizeandmorphologyastheywereformedalreadyduringsolidification.Underheattreatmentcondition,alargenumberofsecondarycarbonitridescanpre-cipitateoutwithveryfinesizeandmakeagreatsecondaryhardeningeffectonthematrix.Asaresult,additionofniobiuminthehardfacingalloycanpreventtheformationofchromium-richphaseongrainboundariesandinter-granularchromiumdepletion.
出版日期
2013年01月11日(中国期刊网平台首次上网日期,不代表论文的发表时间)