ABSTRACT

The increasing demand for cost-efficient, high-quality machined products has led to a requirement for cutting tools that are able to provide a long tool life even when operating under extreme cutting conditions. Hard thin-film coatings deposited on tool substrates have been at the forefront of dealing with such demands. Such coatings provide cutting tools with properties like increased hardness, wear resistance, oxidation resistance, resistance to thermo-mechanical shocks, lower friction coefficient, etc. Vapour deposition techniques are widely used to deposit these thin films. Any variation in process parameters during deposition affects the properties of a coating and hence is a crucial factor to be considered. This review paper discusses some of the commercially used deposition methods, their effects on the crystal morphology, and the thermal and mechanical properties obtained in these coatings. Finally, this paper will also cover some of the recent advancements in hybrid coating technology, nanostructured coatings, and the prospects of sustainable machining.

摘要

对具有成本效益的高质量加工产品的需求不断增长，这就要求切削刀具即使在极端切削条件下也能提供较长的刀具寿命。沉积在工具基材上的硬质薄膜涂层一直处于应对此类需求的最前沿。这种涂层为切削工具提供了诸如增加硬度、耐磨性、抗氧化性、抗热机械冲击、降低摩擦系数等特性。气相沉积技术广泛用于沉积这些薄膜。沉积过程中工艺参数的任何变化都会影响涂层的性能，因此是需要考虑的关键因素。这篇综述论文讨论了一些商业上使用的沉积方法，它们对晶体形态的影响，以及在这些涂层中获得的热和机械性能。最后，本文还将介绍混合涂层技术、纳米结构涂层和可持续加工前景方面的一些最新进展。