摩擦热对Ti6Al4V合金摩擦磨损性能的影响  

Effects of Friction Heat on Tribological Properties of Ti6Al4V Alloy Sliding Against GCr15 Steel

作　　者：邱明[1] 张永振[2] 杨建恒[2] 朱均[1] 

机构地区：[1]西安交通大学润滑理论及轴承研究所 [2]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《摩擦学学报》2006年第3期203-207,共5页Tribology

基　　金：国家自然科学基金资助项目(5037504650432020)

摘　　要：在高速销-盘式摩擦磨损试验机上考察了Ti6A l4V销与GCr15钢盘摩擦副的干滑动摩擦磨损行为,并在线测量了销试样的摩擦接触温度,利用扫描电子显微镜、X射线衍射仪及透射电子显微镜分别对Ti6A l4V摩擦表面和次表层的微观形貌、组织成分、相结构进行研究.结果表明:Ti6A l4V的β相变点温度接近其摩擦系数和磨损率的转折温度;随着摩擦表面温度升高,在Ti6A l4V表面依次形成TiO、TiO2和V2O3;温度骤变促使Ti6A l4V表层析出纳米颗粒,高的摩擦温度使空气中的氮渗入表层而形成VN.上述结果共同对Ti6A l4V/GCr15摩擦副的摩擦磨损行为产生影响.Friction and wear behaviors of Ti6A14V alloys against GCrl5 steel under dry sliding were investigated on high-speed pin-on-disc tribometer. Contact temperatures due to friction heat were measured by a thermocouple inserted into the hole of the Ti6A14V pins. Morphology, composition and phase structure of the surface and subsurface for Ti6A14V were examined by means of scanning electron microscopy （SEM）, X-ray diffraction and transmission electron microscopy （TEM）. Results show that the temperature of β phase transformation is close to that of turning point of friction coefficient and wear rate. TiO, TiO2 and V2O3 are formed in proper order on the surfaces of Ti6A14V alloys as the friction temperature increases. TEM analysis denotes that the nano-particles are separated out on the subsurface of Ti6A14V alloys because of the rapidly temperature variation. The high friction temperature impels nitrogen in air to filter into the subsurface to form VN. Formation of VN affects the tribological behavior of Ti6A14V alloy sliding against C, Cr15.

关 键 词：钛合金 摩擦热 接触温度 摩擦磨损性能 

分 类 号：TH117.3[机械工程—机械设计及理论]