作　　者： ; ; ;

机构地区： 中国石油天然气集团公司

出　　处： 《中国材料科技与设备》 2011年第5期27-30,共4页

摘　　要： 通过粉末冶金工艺制备碳化钒颗粒增强铁基复合材料，研究了原住合成和外加法对复合材料烧结密度、性能及组织结构的影响，并借助金相、SEM、EDS观察了碳化钒的分布及元素成分。试验结果表明：原位合成复合材料具有更高的烧结密度和抗弯强度，在1280℃时达到最大值，分别为7．4g．cm^-3和983MPa，在烧结过程中反应生成了碳化钒颗粒，主要分布在晶界；外加法中的碳化钒颗粒分布更均匀，并通过扩散作用融入Cr、Mo、Fe等合金元素。 VC particle reinforced iron matrix composites were prepared by mechanically mixing and in--situ method. In- fluence of in--situ and mechanically mixing on sintered density, properties and microstructure were investigated. Distribution and elemental composition of VC were analyzed by metallographic, SEM and EDS. The results show that the sintered density and flexural strength of in--situ composites were better. When the sintering temperature was 1280℃, the sintered density and flexural strength reached the maximum, and they were 7.4 g. cm^-3 and 983MPa respectively. The VC particles which distributed in grain boundary＂ mainly were synthesized during sintering process. It was more homogeneously that the mechanically mixing VC distributed, and the alloying elemental such as Cr, Mo, Fe diffused into VC.

关 键 词： 粉末冶金 铁基复合材料 碳化钒 制备

领　　域： [核科学技术]