AlTiN coatings with different Al/Ti ratios (50/50, 60/40, 67/33, 70/30 and 73/27) deposited by cathodic arc PVD are investigated in this paper. An ultra-high speed of 420 m/min was applied during the finish turning tests of stainless steel 304 (SS304). The coating structure was characterized by SEM and XRD techniques. Assorted mechanical properties such as elastic modulus, coating adhesion, hardness and micro-scratch fracture toughness were assessed using nano-indentation and scratch testing. Chip characterization was performed to evaluate the tribological characteristics of the tool/chip interface. The wear performance study showed that cratering was the main wear mechanism. Tool life results have shown that the Al60Ti40 coating featured the longest tool life due to its favorable combination of tribological and micro-mechanical properties.

本文研究了通过阴极电弧PVD沉积具有不同Al / Ti比（50 / 50、60 / 40、67 / 33、70 / 30和73/27）的AlTiN涂层。在304不锈钢（SS304）的精加工过程中施加了420 m / min的超高速。通过SEM和XRD技术表征了涂层结构。使用纳米压痕和划痕测试评估了各种机械性能，例如弹性模量，涂层附着力，硬度和微划痕断裂韧性。进行芯片表征以评估工具/芯片界面的摩擦学特性。磨损性能研究表明，缩孔是主要的磨损机理。刀具寿命结果表明，由于Al60Ti40涂层具有良好的摩擦学性能和微机械性能，因此具有最长的刀具寿命。