【摘要】 在三元硼化物Mo2FeB2基金属陶瓷的基础上添加不同量的WC进行真空液相烧结,并对烧成的试样进行表征。结果表明,添加WC颗粒不影响生成三元硼化物Mo2FeB2的原位液相反应过程,其可作为Mo2FeB2颗粒的形核中心,进一步促进材料烧结致密化,且WC颗粒与Mo2FeB2硬质颗粒形成结合良好的双硬质相,弥散分布在Fe基粘结相中,有效地增强了Mo2FeB2基金属陶瓷硬度及耐磨损性能。当WC添加量为20%(质量分数)时,材料硬度最高,达到HRA87.9,提高了7.2%,在砂轮对磨试验条件下其耐磨性最好,提高了10倍。更多还原

【Abstract】 Different amounts of WC was added to the ternary boride Mo2FeB2-based cermet and then vacuum liquid phase sintering was carried out.The sintered samples were characterized.The results show that WC addition doesn’t affect the in-situ liquid phase reaction process to generate the ternary boride Mo2FeB2.WC can be the nucleation center of Mo2FeB2 particle to promote material densification during sintering.WC particles and Mo2FeB2 particles well combine to form dual hard phase,dispersing in Fe-based binder phase and effectively enhancing hardness and wear resistance of the Mo2FeB2-based cermet.When mass fraction of the added WC is 20%,the sintered sample has the highest hardness of HRA87.9improved by 7.2%,and the best wear resistance increased by 10 times under the experimental conditions of wheel grinding.更多还原