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首页> 外文期刊>Surface & Coatings Technology >Ambient and elevated temperature properties of TiN, TiAlN and TiSiN PVD films and their impact on the cutting performance of coated carbide tools
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Ambient and elevated temperature properties of TiN, TiAlN and TiSiN PVD films and their impact on the cutting performance of coated carbide tools

机译：TiN，TiAlN和TiSiN PVD薄膜的环境高温特性及其对涂层硬质合金刀具切削性能的影响

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摘要

The cutting performance of hardmetal inserts coated with PVD TiN, TiAlN and TiSiN films was investigated by innovative analytical-expenmental methods, for explaining the effect of coating properties on coated tool wear in milling. Nanoindentation results were evaluated by FEM-supported algorithms for determining the stress-strain constitutive laws of the applied films. According to these laws, the TiSiN films possess enhanced mechanical properties in comparison to TAlN and TiN coatings. Moreover, in perpendicular impact experiments at various temperatures, the TiSiN films exhibited the best resistance and fatigue behaviour. Additionally, Rockwell C indentations and inclined impact tests were performed to assess qualitatively and quantitatively the films' adhesion on the substrate. These tests revealed a deteriorated adhesion of the TiSiN coating compared to the corresponding ones of the other two films. Finally, by FEM-supported calculations of the material removal process in milling, the mechanical and thermal loadings of the cutting edge were estimated and insight was provided concerning the effect of coating adhesion, mechanical properties and fatigue on the cutting performance. The deterioration of the adhesion of the TiSiN films on the substrate led to a cutting performance reduction in milling compared to the one achieved with TiAlN coated hardmetal inserts.
机译：通过创新的分析实验方法研究了涂覆有PVD TiN，TiAlN和TiSiN膜的硬质合金刀片的切削性能，以解释涂层特性对铣削中涂层刀具磨损的影响。纳米压痕结果通过FEM支持的算法进行评估，以确定所施加薄膜的应力-应变本构关系。根据这些定律，与TAlN和TiN涂层相比，TiSiN膜具有增强的机械性能。此外，在各种温度下的垂直冲击实验中，TiSiN膜均表现出最佳的抵抗力和疲劳性能。此外，进行了洛氏C压痕和倾斜冲击试验，以定性和定量地评估薄膜在基材上的附着力。这些测试表明，与其他两个薄膜中的相应薄膜相比，TiSiN涂层的附着力下降。最后，通过FEM支持的铣削材料去除过程的计算，可以估算切削刃的机械和热负荷，并提供有关涂层附着力，机械性能和疲劳度对切削性能的影响的见解。与用TiAlN涂层硬质合金刀片实现的切削性能相比，TiSiN膜在基材上的附着力下降导致铣削切削性能下降。

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