热氧化温度对Ti6Al4V耐磨性的影响

Effects of Thermal Oxidation Temperature on Wear Resistance of Ti6Al4V

摘要:

在873～1023 K 保温10 h 条件下对Ti6Al4V进行热氧化处理。采用X射线衍射仪，辉光光谱分析仪和光学显微镜分析热氧化层的特征。借助MFT-R4000往复式摩擦磨损试验机研究热氧化温度对Ti6Al4V耐磨性的影响。结果表明：Ti6Al4V表面的热氧化层均匀、连续；热氧化温度对氧化层的形成、表面硬度和耐磨性有显著影响；973 K获得的氧化层表面硬度最高，磨损失重最低，磨痕宽度最小，耐磨性能最好。

Abstract:

Thermal oxidation (TO) treatments were conducted on Ti6Al4V under 873～1023 K for 10 h. Microstructural characteristics of the TO layers were analyzed using X-ray diffraction (XRD), glow discharge optical emission spectrometer analysis (GDOES) and optical microscope (OM). Effect of TO temperature on wear resistance of Ti6Al4V was estimated on MFT-R4000 reciprocating friction-wear testing machine. The results showed that the obtained TO layers were uniform and continuous. TO temperatures had significant impacts on the formation, surface hardness and wear resistance on TO layers. The TO layer produced at 973 K exhibited the best wear resistance indicating by higher surface hardness, lower mass loss and narrower wear trace in comparison with other TO layers.