用熔铸法制备不同(TiB+ TiC)含量的原位自生(TiC+ TiB)/Ti6Al4V复合材料,通过HT-1000型摩擦磨损试验机研究(TiC+ TiB)含量对复合材料干滑动摩擦磨损性能的影响,并用扫描电镜和激光共焦显微镜观察分析其磨损行为.结果表明:原位合成的复合材料较基体合金硬度增加,磨损率降低,具有优异的耐磨性能,摩擦系数小且起伏较小,摩擦性能稳定.复合材料磨面上TiO2、SiO2和Al2O3氧化产物增加,磨痕变浅,呈断续状磨痕数量增加,摩擦氧化物对磨损表面起到一定保护作用.
(TiC + TiB)/Ti6Al4V composites with different (TiC + TiB) contents were prepared by casting method.The influence of (TiC + TiB) contents on dry sliding friction and wear performance of in-situ (TiC + TiB)/Ti6Al4V composites was studied by HT-1000 friction and wear testing machine,and the wear behaviors of the composites were also investigated by scanning electron microscopy and laser confocal microscopy.The results show that the in-situ synthesized composites have higher hardness and lower wear rate than the base alloy,and have excellent abrasion resistance,small friction coefficient and little fluctuation,and stable friction performance.The oxidation products like TiO2,SiO2 and Al2O3 on the grinding surface of the composites increase,and the wear marks become shallow and the number of intermittent wear marks increase.The friction oxides play a protective role on the wear surface.
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