Effect of film ion bombardment during the PVD process on the mechanical properties and cutting performance of TiAlN coated tools.
Effect of film ion bombardment during the PVD process on the mechanical properties and cutting performance of TiAlN coated tools.
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DOI：
10.1016/j.surfcoat.2007.06.025
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发表时间：
2007-12
影响因子：
5.4
通讯作者：
K. Bouzakis;G. Skordaris;N. Michailidis;I. Mirisidis;G. Erkens;R. Cremer
中科院分区：
文献类型：
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作者：
K. Bouzakis;G. Skordaris;N. Michailidis;I. Mirisidis;G. Erkens;R. Cremer
PVD工艺参数如沉积速率、沉积时间、偏置电压等对涂层的结构和强度性能有显著影响，从而影响涂层刀具的切削性能。在所描述的研究中，硬质合金刀片在三个单独的工艺中涂覆相同的PVD纳米复合TiAlN薄膜，保持所有参数不变，改变衬底的定位几何形状和沉积时间。通过这种方法，可以生产出总沉积时间和离子轰击持续时间不同但膜厚大致相同的涂层刀具。对涂层刀片的铣削性能进行了系统的研究。利用纳米压痕和冲击试验分别对材料的力学性能和疲劳性能进行了有限元模拟，并对实验结果进行了解释。结果表明，在相同的涂层厚度下，较长的沉积时间和暴露在离子冲击下的时间导致生长的薄膜致密化，从而提高了成品率、断裂和临界疲劳强度，从而显著提高了刀具的使用寿命。
PVD process parameters, such as the deposition rate and duration, the bias voltage etc, affect significantly the film structure and strength properties and consequently the coated tool cutting performance. In the described investigations, cemented carbide inserts were coated with the same PVD nanocomposite TiAlN film in three individual processes, keeping all parameters constant and varying the substrates' positioning geometry as well as the deposition duration. In this way coated cutting inserts with various overall deposition durations and ions' bombardment durations, but with approximately the same film thickness were produced. The cutting performance of the coated inserts was investigated systematically in milling. The obtained results were explained by the FEM simulation of the cutting process, considering the mechanical and fatigue properties, as established by nanoindentations and impact tests respectively. The results revealed that at constant coating thickness, longer deposition duration and exposure time to ions' impacts lead to a densification of the growing film thus improving its yield, rapture and critical fatigue strength, resulting to a significant tool life increase in milling.