V8C7增强铁基复合材料的制备和性能  

The preparation and properties of V_8C_7 particles reinforced iron matrix composite

作　　者：丁义超[1] 王一三[1] 王静[2] 倪亚辉[2] 

机构地区：[1]四川大学制造科学与工程学院,成都610065 [2]成都电子机械高等专科学校,成都610031

出　　处：《材料研究学报》2008年第3期317-321,共5页Chinese Journal of Materials Research

基　　金：科技部中小企业技术创新基金(01C26225111100955)资助项目~~

摘　　要：用一种将粉末冶金和原位合成相结合的全新方法原位合成了V_8C_7颗粒增强铁基复合材料,对其微观组织、耐磨性及其磨损机理进行了分析,并探讨了Re-V-C三元体系原位合成V_8C_7的机理.结果表明:石墨的存在降低了σ-(FeV)相的稳定性,使其分解为固溶大量V的α-Fe,C与V发生碳化反应生成V_8C_7;原位合成的V_8C_7颗粒增强铁基复合材料由增强相V_8C_7和α-Fe相组成,V_8C_7颗粒均匀分布在珠光体基体上;在重载干滑动摩擦条件下,V_8C_7颗粒增强铁基复合材料显示出良好的耐磨性能.A novel process which combines synthesis in-situ with powder metallurgy technique, was used to produce VsC7 particulates reinforced iron matrix composite. The microscopic structure and the wear-resistance of the composite were examined. The mechanism of V8C7 fabricated in situ was analyzed in Fe-V-C ternary system. The results show that graphite reduced the stability of σ-（FeV）, and σ-（FeV） decomposed into α-Fe which V atoms dissolved in. The composite was mainly made of α-Fe and VsC7 particles evenly distributed on the pearlitic matrix, and displayed good wear-resistance under dry sliding with heavy load.

关 键 词：复合材料 粉末冶金 原位合成 耐磨性能 

分 类 号：TB333[一般工业技术—材料科学与工程] TH117[机械工程—机械设计及理论]