About the article
.Sh. MIGRANOV, Dr. Sc., A.M. MIGRANOV, Postgraduate
The paper presents the results of a study of the proposed way to increase the wear resistance of “duplex” coatings applied to cutting tools, which are due to preliminary diffusion saturation of the tool surface with nitrogen (known as ion nitriding) followed by physical deposition of a hard coating (Ti, Cr) N. The proposed coating was applied to a high-speed steel tool, but before that a layer with an impurity of ions was implanted on the nitrided surface, and then a hard coating was deposited. As an additional, transition layer, a metal was used: Ti, Zr, W and Al in combination with three non-metals N, C, and O. At the stage of the triplex-processing process, these ions were implanted into the surface of the substrate, creating a modified layer. To assess the effect of these modified layers on the tool life, a series of field experiments were carried out under the conditions of blade cutting. The best results were achieved with "triplex" treatment with titanium ion implantation.
wear resistance, duplex coatings, hard coating, tribotechnical characteristics, modified layer, "triplex" treatment.