新型TiAl基合金材料的摩擦磨损性能研究  

Study on Friction and Wear Properties of TiAl Based Alloy Material

作　　者：闫昂昂 杨丽颖[1] 王守仁[1] 吴雅玉 

机构地区：[1]济南大学机械工程学院,山东济南250022

出　　处：《热加工工艺》2016年第18期58-60,65,共4页Hot Working Technology

基　　金：山东省科技发展计划项目(2012GGX10219)

摘　　要：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。On the basis of the alloy Ti44Al2Cr2Nb adding B, high component of Nb （8%） and high hardness of ceramic particle nucleation Al2O3, new titanium aluminum alloy material of Ti44Al2Cr8Nb3V0.5B0.5 Al2O3 with the properties of antiwear, high temperature resistance and light weight were prepared by vacuum hot pressing sintering powder metallurgy techniques. The friction and wear test were carried out on MMG-10 high temperature protective atmosphere friction and wear test machine. The friction coefficient and wear rate of the material under different contact pressure p, different conditions of sliding speed v at room temperature were studied. The microstructure change and chemical composition of the material was analyzed by using SEM and energy dispersive spectroscopy before and after wear and then the mechanism of friction and wear was studied. The results show that：at room temperature, the friction coefficient of Ti44Al2Cr8Nb3V0.5B0.5 Al2O3 novel titanium aluminum alloy material decreases with contact pressure p, sliding velocity v increasing; the wear rate increases with contact pressure p, sliding velocity v increasing. The wear mechanism of Ti44Al2Cr8Nb3V0.5B0.5 Al2O3 novel titanium aluminum alloy is abrasive wear and adhesive wear.

关 键 词：TiAl基合金材料 热压烧结 摩擦磨损 

分 类 号：TG113.2[金属学及工艺—物理冶金]