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在Ti44Al2Cr2Nb合金的基础上添加B和高组分Nb(8%)以及高硬度陶瓷形核质点Al_2O_3,采用粉末冶金真空热压烧结技术制备出抗磨减摩、耐高温、轻质的Ti44Al2Cr8Nb3V0.5B0.5Al_2O_3新型钛铝合金材料。并在MMG-10高温气氛保护摩擦磨损试验机上进行摩擦磨损试验,研究了该材料在室温、不同接触压力p、不同的滑动速度v条件下的摩擦系数及磨损率,分别利用扫描电镜(SEM)和能谱分析仪(EDS)观察材料磨损前后微观形貌的变化并分析其成分,进而研究其摩擦磨损机理。结果表明:在室温环境下,Ti44Al2Cr8Nb3V0.5B0.5Al_2O_3新型钛铝合金料的摩擦系数随接触压力p、滑动速度v的增加而减小;磨损率随接触压力p、滑动速度v的增加而增加;该新型钛铝合金材料的磨损机理主要是磨粒磨损和粘着磨损。
Based on the Ti44Al2Cr2Nb alloy, B and high-component Nb (8%) and high hardness ceramic nucleation point Al_2O_3 were added, and the anti-wear, high temperature and light Ti44Al2Cr8Nb3V0.5B0 .5Al_2O_3 new titanium aluminum alloy material. Friction and wear tests were carried out on the MMG-10 high temperature atmosphere friction protection wear tester. The friction coefficient and wear rate of the material under room temperature, different contact pressure p, and different sliding velocity v were studied. Scanning electron microscopy (SEM) And energy dispersive spectrometer (EDS) were used to observe the change of microstructure before and after wear and analyze the composition of the material. Then the mechanism of friction and wear was studied. The results show that the friction coefficient decreases with the increase of contact pressure p and slip velocity v at room temperature. The wear rate increases with the increase of contact pressure p and slip velocity v. The wear mechanism of the new titanium aluminum alloy material is mainly abrasive wear and adhesion wear.