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Open AccessArticle

Tribooxidation as a Way to Improve the Wear Resistance of Cutting Tools

Surface Phenomena Researches Group, I.P. Bardin Central Research Institute for Ferrous Metallurgy, 23/9 bdg. 2, Radio str., 105005 Moscow, Russia
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Coatings 2018, 8(6), 223; https://doi.org/10.3390/coatings8060223
Received: 27 April 2018 / Revised: 29 May 2018 / Accepted: 5 June 2018 / Published: 18 June 2018
(This article belongs to the Special Issue Surface Engineering and Nanofilms)
This paper generalizes the results of our research, which was aimed at the development of adaptive cutting tool coatings for high speed dry cutting, from the inception of the idea to complex multilayer coatings for processing tough metals. Typically, the streams of external energy and matter during high speed cutting are causing damage to the tool materials and to the hard, protective coatings through multiple mechanical and chemical processes including oxidation, however these oxidation processes could be used to improve the tools’ lifetime. The structure and the phase transformations on the wear surface in the nanostructured single layer and nanolaminated multilayer PVD coatings were investigated by a set of electron spectroscopy methods. The dynamics of the secondary phase formation on the various stages of tool life is demonstrated. The obtained results show that the enhancement of non-equilibrium processes during friction leads to a dominating formation of protective triboceramics on a base of sapphire-like, tungsten, and niobium polyvalent oxides with a structure which decisively improves the wear performance. The mechanisms of the formation of non-equilibrium protective oxides at high speed dry cutting and the non-equilibrium thermodynamics approaches for the tribooxidation description are discussed. Polyvalent metals and multilayer coatings provide a wider set of protective oxide nanofilms. View Full-Text
Keywords: wear resistance; high speed dry cutting; PVD coatings; tribooxides; XPS; AES; EELFS wear resistance; high speed dry cutting; PVD coatings; tribooxides; XPS; AES; EELFS
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Wainstein, D.; Kovalev, A. Tribooxidation as a Way to Improve the Wear Resistance of Cutting Tools. Coatings 2018, 8, 223.

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