Deposition of Multicomponent AlTiCrMoN Protective Coatings for Metal Cutting Applications

Abstract

<jats:p>The high potential of the protective coatings for metal machining applications using the physical vapor deposition (PVD) processes is one to be valued, and will accelerate development of the multicomponent coating design and increase the cutting efficiency. In this study, nanostructured AlTiCrMoN coatings in a multilayered structure were fabricated using cathodic-arc deposition (CAD). Controlling the cathode current of both CrMo and AlTi alloy targets in a nitrogen environment, multilayered AlTiN/CrMoN coatings were deposited. The AlTiN and AlTiN/CrMoN multilayered coatings exhibit a face-centered cubic (fcc) structure with columnar morphologies. The highest hardness of 35.6 ± 1.5 GPa was obtained for the AlTiN coating; however, the H3/E*2 and H/E* values were the lowest (0.124 and 0.059, respectively). The multilayered AlTiN/CrMoN coatings possessed higher H3/E*2 and H/E* values of up to 0.157 and 0.071, respectively. The present study investigated the cutting performance of end mills in the milling of SUS316L stainless steel. The cutting performance was evaluated in terms of cutting length and tool wear. Because of high resistance to adhesive and abrasive wear, the end mills coated with multilayered AlTiN/CrMoN showed less flank wear than monolithic AlTiN. The introduction of CrMoN sublayers improved the cutting tool life of AlTiN.</jats:p>

Influence of DLC Coatings Deposited by PECVD Technology on the Wear Resistance of Carbide End Mills and Surface Roughness of AlCuMg2 and 41Cr4 Workpieces

“…We purposefully selected iron-containing steel as the material to be processed to study the functioning of the adhesive sublayer and the outer DLC layer under the loads typical for milling this material. We should add that the authors have research experience in using DLCs for turning hardened bearing steels, and in their previous works, a specific effect was observed from the use of coatings for ceramic tools [21,[47][48][49]. This makes it possible to use a carbide tool as an object of research in this work.…”

Tribological and Mechanical Properties of Multicomponent CrVTiNbZr(N) Coatings

“…Poisson's ratio of ν = 0.25 was assumed for the deposited coatings. The Rockwell-C indentation test was performed using a Rockwell-C hardness tester (HR-200, Mitutoyo Taiwan Co.,Taichung, Taiwan) with an applied load of 150 kg to evaluate the adhesion strength following the ISO 26443 standard [27,28]. Similar to Verein Deutscher Ingenieure (VDI) 3198 indentation test evaluation, ISO 26443 specifies a method for the qualitative evaluation of the adhesion of ceramic coatings by indentation with a Rockwell diamond indenter.…”

Development of DLC-Coated Solid SiAlON/TiN Ceramic End Mills for Nickel Alloy Machining: Problems and Prospects

“…In addition, the presence of a nitride sublayer under the DLC layer based on the Cr-Al-Si system increases the strength of the external DLC layer's adhesive bond with the tool base [83][84][85] and contributes to the formation of secondary wear-resistant phases during high-temperature heating [86][87][88][89][90]. When heated in oxygen, the coating components can form nonstoichiometric oxide phases, contributing to the change in the contact interaction between the ceramic article and the counter body nature [91][92][93].…”