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为表征颗粒增强钛基复合材料在恶劣的磨粒磨损条件下的磨损行为,对熔铸法制备的TiCP/Ti6Al4V进行了磨粒磨损条件下的耐磨性试验,并利用SEM、EDX等技术分析了复合材料的磨损过程及磨损机制.研究表明:TiCP/Ti6Al4V复合材料的抗磨粒磨损性能,总体上随TiC颗粒体积分数的增加而提高,载荷越大、磨损时间越长,复合材料越容易表现出优异的耐磨性能;TiC的形态影响着耐磨性的提高,细小颗粒状或羽毛状TiC单位体积增加对耐磨性的贡献,比枝晶状TiC单位体积增加对耐磨性的贡献大约3.5倍;复合材料在磨损初始阶段,其磨损机制以形成犁削和磨沟为主,形成一次磨屑,随着增强相含量的提高,一次磨屑逐步减少,磨损以犁沟和剥层磨损为主,需要磨粒的反复作用才能形成磨屑,因此,耐磨性得到提高.
In order to characterize the wear behavior of the particle reinforced titanium matrix composites under severe abrasive wear conditions, the wear resistance of the as-cast TiCP / Ti6Al4V under abrasive wear condition was tested. The wear resistance of the composite was tested by SEM and EDX The wear process and wear mechanism of TiCP / Ti6Al4V composites are studied.The results show that the wear resistance of TiCP / Ti6Al4V composites increases with the increase of volume fraction of TiC particles, the larger the load and the longer the wear time, the easier the composites will be Out of excellent wear resistance; TiC morphology affect the wear resistance increases, small granular or feather-shaped TiC volume increases the contribution to the wear resistance than dendritic TiC unit volume increases the wear resistance of about 3.5 times. At the initial stage of wear, the wear mechanism of the composites is mainly composed of plowing and grinding grooves, forming a wear debris. With the increase of the content of reinforcing phase, the wear debris decreases gradually and the wear is reduced by the furrow and peeling layer The main need to repeat the role of abrasive in order to form wear debris, therefore, wear resistance is improved.