Ti6Al4V钛合金表面双层辉光等离子W-Mo共渗及其腐蚀磨损性能研究

为了改善TC4的腐蚀磨损性能,采用双层辉光等离子表面冶金技术对Ti6Al4V钛合金进行W-Mo共渗,并对其腐蚀磨损性能进行研究。结果表明:在Ti6Al4V钛合金表面W-Mo共渗可形成均匀的、由沉积层和扩散层构成的W-Mo改性层;该改性层与Ti6Al4V钛合金基体相比,在空气中,5%H2SO4(质量分数)溶液和5%NaCl(质量分数)溶液中的摩擦系数均有所降低,磨损形貌得到改善,在5%H2SO4和5%NaCl溶液中的磨损量更是显著减小。结果表明,在Ti6Al4V钛合金表面W-Mo共渗可显著提高其耐腐蚀磨损性能。

Preparation of W-Mo Copenetrated Layer on Ti6Al4V Titanium Alloy Surface by Double Glow Discharge Technique and Its Corrosive-Wear Properties

To improve the corrosive-wear resistance of the Ti6Al4V titanium alloy, W-Mo co-penetrated layer was prepared on Ti6Al4V titanium alloy surface by double glow discharge technique. The corrosive-wear properties of the co-penetrated layer were investigated. The results show that W-Mo co-penetrated layer combined well with the substrate, and the layer was composed of deposited layer, transition layer and diffused layer. Compared with Ti6Al4V substrate, the alloying layer exhibited a lower friction coefficient, improved wear morphology and an obviously decreased wearing volume in 5wt%NaCl and 5wt% H2SO4 solutions. All these indicate that W-Mo co-penetrated layer can enhance the corrosive-wear resistance of the Ti6Al4V titanium alloy