Ti-5Al-5V-5Mo-3Cr(Ti-5553)合金是一种相对新颖的难切削材料,在文献中具有有限的可加工性和工具寿命分析,因此需要进一步调查。本研究的重点是Ti-5553在高速精轧下的加工和摩擦学性能(150m/min,175米/分钟,和200m/min)通过新型单层/双层PVD涂层WC工具。基础AlTiN涂层用作参考单层涂层,与AlCrN,类似钻石的ta-C,和TiAlSiN涂层,每个涂层沉积在基础AlTiN涂层的顶部,总共四个单独的涂层工具(一个单层和三个双层)。刀具寿命,切削力,工件表面质量,和摩擦学芯片分析是本研究的研究对象之一。总的来说,AlTiN/AlCrN涂层刀具的性能优于所有其他组合:在三种速度下平均时,相对于基础AlTiN涂层,刀具寿命提高了约19%;最低表面粗糙度值:〜0.30、0.33和0.64µm;以及最低切屑背面粗糙度值:在150、175和200m/min时,〜0.80、0.68和0.81µm,分别。这些结果表明,AlTiN/AlCrN涂层是涉及Ti-5553高速加工的工业应用的出色候选材料。
The Ti-5Al-5V-5Mo-3Cr (Ti-5553) alloy is a relatively novel difficult-to-cut material with limited machinability and tool life analysis available in the literature, and hence requires further investigation. This study focuses on the machining and tribological performance of Ti-5553 under high-speed finish turning (150 m/min, 175 m/min, and 200 m/min) via novel mono/bi-layered PVD-coated WC tools. A base AlTiN coating is used as the reference monolayer coating, with AlCrN, diamond-like ta-C, and TiAlSiN coatings each deposited on top of a base AlTiN coating, totaling four separate coated tools (one monolayer and three bi-layer). Tool life, cutting forces, workpiece surface quality, and tribological chip analysis are among the subjects of investigation in this study. Overall, the AlTiN/AlCrN coated tool outperformed all the other combinations: an improvement of ~19% in terms of tool life in reference to the base AlTiN coating when averaging across the three speeds; lowest surface roughness values: ~0.30, 0.33, and 0.64 µm; as well as the lowest chip back surface roughness values: ~0.80, 0.68, and 0.81 µm at 150, 175, and 200 m/min, respectively. These results indicate that the AlTiN/AlCrN coating is an excellent candidate for industrial applications involving high-speed machining of Ti-5553.