As is well known, titanium alloy precipitates when subjected to aging treatment, which poses great influence on its mechanical properties. Thus, solution and solution-aging treatments were conducted in this work, and the wear performance was investigated under different normal loads. The results showed that acicular α′ martensite in the original selective laser melted Ti–6Al–4V was decomposed into α + β phases after the solution treatment, and then Ti₃Al nanoparticles clusters were further formed in the α-matrix after the solution-aging treatment. The coefficient of friction decreased straightly as the normal load was increased from 20 to 100 N, and the wear mechanisms were characterized by abrasion, adhesive and oxidative wears. The wear rate of solution and solution-aging treated samples increased significantly comparing to the as-built counterpart, but the increment of the solution-aging treated sample was smaller than that of the solution-only treated sample, because of the Ti₃Al precipitation in the solution-aging treated sample. These particles provided ball-like effect, reduced material losses and stabilized the wear process. All these factors contributed to the improvement in wear properties of the parts made by selective laser melting.

众所周知，钛合金在进行时效处理时会析出，对其力学性能影响很大。因此，在这项工作中进行了固溶和固溶时效处理，并研究了不同法向载荷下的磨损性能。结果表明，原先选择性激光熔化的 Ti-6Al-4V中的针状α ′ 马氏体在固溶处理后分解为α  +  β相，然后在α中进一步形成Ti ₃ Al 纳米粒子簇- 固溶时效处理后的基质。随着法向载荷从 20 N 增加到 100 N，摩擦系数直线下降，磨损机制表现为磨损、粘着磨损和氧化磨损。固溶和固溶时效处理试样的磨损率与竣工试样相比显着增加，但固溶时效处理试样的磨损率小于仅固溶处理试样的磨损率，这是因为 Ti ₃ Al 析出在固溶时效处理的样品中。这些颗粒提供了球状效果，减少了材料损失并稳定了磨损过程。所有这些因素都有助于提高选择性激光熔化制成的零件的耐磨性能。