热氧化时间对Ti6Al4V表层组织和性能的影响

Effect of Thermal Oxidation Duration on Microstructure and Properties of Ti6Al4V

摘要:

在973 K 保温10 h,20 h,30 h,40 h,50 h条件下对Ti6Al4V进行热氧化处理。采用X射线衍射仪、辉光光谱分析仪和扫描电镜分析热氧化层的特征。借助显微硬度计,往复摩擦磨损试验机和电化学工作站研究热氧化时间对Ti6Al4V的表面硬度、耐磨性和耐蚀性的影响。结果表明：Ti6Al4V表面的热氧化层均匀、连续；热氧化时间对氧化层的形成、表面硬度耐磨性和耐蚀性有显著影响；973 K-30 h工艺下获得的氧化层具有较好的综合特征。

Abstract:

Thermal oxidation (TO) treatments were conducted on Ti6Al4V under 973 K for 10 h, 20 h ,30 h, 40 h and 50 h,. Microstructural characteristics of the TO layers were analyzed using X-ray diffraction (XRD), glow discharge optical emission spectrometer analysis (GDOES) and scanning electron microscope (SEM). Effect of TO duration on microstructure and properties of Ti6Al4V were estimated on microhardness tester, MFT-R4000 reciprocating friction-wear testing machine and electrochemical workstation. The results showed that the obtained TO layers were uniform and continuous. TO duration had certain impacts on the formation, surface hardness, wear and corrosion resistance on TO layers. The TO layer produced at 973 K-30 h exhibited more promising characteristics indicating by thickness value, surface hardness, wear and corrosion resistance in comparison with other TO layers.