The high-speed finish turning tests of Ti-17 titanium alloy (Ti-5Al-2Sn-2Zr-4Mo-4Cr) were carried out by using PVD cemented carbide tools with TiAlN coating. The machinability behaviors in terms of cutting forces, cutting temperatures, surface roughness, and tool service life were measured and evaluated under different machining parameter conditions, and the empirical prediction model of these variables were established depending on the cutting parameters. Incorporating the measured results of scanning electron microscopy (SEM) as well as energy dispersive spectroscopy (EDS), the initial tool wear patterns and the eventual wear patterns when the tool wear states meet the failure criteria were comparably investigated and analyzed. It was found that during the initial wear stage, the sticking wear zone and the sliding wear zone can be distinguished on the tool wear interface. The main wear patterns of are peeling off of coating material, crater wear of rake face, edge breakage and edge wear of tool tip after reaching the tool failure rejection criterion. The cutting tool wear mechanisms were systematically studied, and the results show that the wear mechanisms of a TiAlN PVD-coated carbide cutting tool in turning Ti-17 titanium alloy were dominated by the interaction wear effect among the adhesion, oxidation and diffusion between cemented carbide substrate and workpiece material.

使用带有TiAlN涂层的PVD硬质合金刀具对Ti-17钛合金（Ti-5Al-2Sn-2Zr-4Mo-4Cr）进行了高速精车削试验。在不同的加工参数条件下，测量并评估了切削力，切削温度，表面粗糙度和刀具使用寿命方面的可加工性，并根据切削参数建立了这些变量的经验预测模型。结合扫描电子显微镜（SEM）和能量色散光谱（EDS）的测量结果，对工具磨损状态满足失效标准的初始工具磨损模式和最终磨损模式进行了比较研究和分析。发现在最初的磨损阶段，可以在工具磨损界面上区分粘着磨损区和滑动磨损区。达到磨损失效标准后，涂层的主要磨损方式是剥落涂层，前刀面的月牙洼磨损，刃口破损和刀尖刃口磨损。对切​​削刀具的磨损机理进行了系统研究，结果表明，TiAlN PVD涂层硬质合金刀具在车削Ti-17钛合金时的磨损机理主要受硬质合金之间附着，氧化和扩散之间的相互作用磨损影响基材和工件材料。