scholarly journals Nano-scale Multilayered Composite Coatings for Cutting Tools Operating under Heavy Cutting Conditions

Procedia CIRP ◽  
2014 ◽  
Vol 14 ◽  
pp. 239-244 ◽  
Author(s):  
A.A. Vereschaka ◽  
S.N. Grigoriev ◽  
A.S. Vereschaka ◽  
A.Yu. Popov ◽  
A.D. Batako
Keyword(s):  
Composite Coatings ◽  
Cutting Tools ◽  
Cutting Conditions ◽  
Nano Scale ◽  
Multilayered Composite ◽  
Coatings For Cutting Tools

Nano-scale multilayered-composite coatings for the cutting tools

2014 ◽  
Vol 72 (1-4) ◽  
pp. 303-317 ◽  
Author(s):  
A. A. Vereshchaka ◽  
A. S. Vereshchaka ◽  
O. Mgaloblishvili ◽  
M. N. Morgan ◽  
A. D. Batako
Keyword(s):  
Composite Coatings ◽  
Cutting Tools ◽  
Nano Scale ◽  
Multilayered Composite

scholarly journals Improvement of structure and quality of nanoscale multilayered composite coatings, deposited by filtered cathodic vacuum arc deposition method

2016 ◽  
Vol 7 ◽  
pp. 184798041668080 ◽  
Author(s):  
Alexey A Vereschaka ◽  
Anatoly S Vereschaka ◽  
Andre DL Batako ◽  
Boris J Mokritskii ◽  
Anatoliy Y Aksenenko ◽  
...  
Keyword(s):  
Composite Coating ◽  
Surface Defects ◽  
Composite Coatings ◽  
Cutting Tools ◽  
Vacuum Arc ◽  
Multilayered Composite ◽  
Vacuum Arc Deposition ◽  
Filtered Cathodic Vacuum Arc ◽  
Longitudinal Turning ◽  
Arc Deposition

This article studies the specific features of cathode vacuum arc deposition of coatings used in the production of cutting tools. The detailed analysis of the major drawbacks of arc-Physical Vapour Deposition (PVD) methods has contributed to the development of the processes of filtered cathodic vacuum arc deposition to form nanoscale multilayered composite coatings of increased efficiency. This is achieved through the formation of nanostructure, increase in strength of adhesion of coating to substrate up to 20%, and reduction of such dangerous coating surface defects as macro- and microdroplets up to 80%. This article presents the results of the studies of various properties of developed nanoscale multilayered composite coating. The certification tests of carbide tool equipped with cutting inserts with developed nanoscale multilayered composite coating compositions in longitudinal turning (continuous cutting) and end symmetric milling, and intermittent cutting of steel C45 and hard-to-cut nickel alloy of NiCr20TiAl showed advantages of tool with nanoscale multilayered composite coating as compared to the tool without coating. The lifetime of the carbide inserts with developed NMCC based on the system of Ti–TiN–(NbZrTiCr)N (filtered cathodic vacuum arc deposition) was increased up to 5–6 times in comparison with the control tools without coatings and up to 1.5–2.0 times in comparison with nanoscale multilayered composite coating based on the system of Ti–TiN–(NbZrTiCr)N (standard arc-PVD technology).

scholarly journals Improvement reliability of cutting ceramic through use of damping system and nanostructured multilayered composite coatings

2018 ◽  
Vol 19 (6) ◽  
pp. 606
Author(s):  
Alexey Vereschaka ◽  
Boris Mokritskii ◽  
Alexey Krapostin ◽  
Nikolay Sitnikov ◽  
Gaik Oganyan
Keyword(s):  
Composite Coatings ◽  
Cutting Tools ◽  
Ceramic Tool ◽  
Tool Failure ◽  
Hardened Steels ◽  
Ion Flow ◽  
Automated Production ◽  
Ceramic Tools ◽  
Multilayered Composite ◽  
Cutting Ceramic

This paper considers new avenues of improving the efficiency of machining hardened steels using damping devices and nanostructured multilayered composite coatings deposited on ceramic cutting tools with innovative arc-PVD processes with filtration of vapor-ion flow. A developed technology allows reducing peak stresses arising during cutting-in and providing improved reliability of ceramic tools. It is observed that the formation of modifying coatings on an edge ceramic tool in machining of hardened steels with HRC > 50 under the conditions of damping can reduce the coefficient of tool failure variation down to 0.3, and that improves the ability to predict failure of ceramic tools and allows recommending ceramic tools for the use in automated production.

Processing and Properties of Gamma+Laves Phase in-situ Composite Coatings Deposited via Magnetron Sputtering

2000 ◽  
Vol 646 ◽  
Author(s):  
Feng Huang ◽  
William S. Epling ◽  
John A. Barnard ◽  
Mark L. Weaver
Keyword(s):  
Titanium Aluminides ◽  
Composite Coatings ◽  
Cutting Tools ◽  
Laves Phase ◽  
Wear Resistant Coatings ◽  
Structural Applications ◽  
Alloy Target ◽  
Oxidation Resistant ◽  
Coatings For Cutting Tools

ABSTRACTRecent research efforts have established that Laves phase reinforced gamma titanium aluminides (i.e. γ + Laves) offer significant potential as oxidation resistant coating in high-temperature structural applications and as wear-resistant coatings for cutting tools. In this study, TiAlCr coatings were magnetron sputtered from a Ti-51Al-Cr alloy target onto various substrates. The microstructure, hardness, and stress behavior of the as-deposited and annealed coatings have been investigated.

scholarly journals Tribological properties of ion-modified composite coatings

2021 ◽  
Vol 2059 (1) ◽  
pp. 012015
Author(s):  
M Sh Migranov ◽  
A M Migranov ◽  
S R Shekhtman
Keyword(s):  
Wear Resistance ◽  
Tool Life ◽  
High Speed ◽  
Composite Coatings ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Hard Coating ◽  
Ion Nitriding ◽  
Additional Layer ◽  
Nitrided Surface

Abstract The paper presents the results of a study of one of the ways 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 also contains an additional layer with an impurity of ions, deposited on a preliminary nitrided surface of high speed steel before the deposition of a hard coating. Tests were carried out to evaluate the effect of these modified layers on the tool life of the HSS tool. The greatest wear resistance after "triplex" - treatment was achieved during ion implantation of titanium into a pre-nitrided surface. The coefficient of friction of the modified layer was studied at different contact temperatures. Ionic mixing contributes to the appearance of a thin surface layer with an amorphous-like structure, which prolongs the stage of normal wear, which significantly increases the tool life as a result of the self-organization process.

Experimental Study on Tool Wear when Machining Super Titanium Alloys: Ti6Al4V and Ti-555

2013 ◽  
Vol 763 ◽  
pp. 51-64
Author(s):  
Mohammed Nouari ◽  
Hamid Makich
Keyword(s):  
Tool Wear ◽  
Temperature Rise ◽  
Wear Behavior ◽  
Flow Direction ◽  
Cutting Tools ◽  
Cutting Speed ◽  
Cutting Conditions ◽  
Wear Process ◽  
Texture Modification ◽  
Wear Modes

To understand the effect of the workpiece microstructure on the tool wear behavior, anexperimental investigation was conducted on machining two different microstructures of supertitanium alloys: Ti-6Al-4V and Ti-555. The analysis of tool-chip interface parameters such asfriction, heat flux and temperature rise and the evolution of the workpiece microstructure underdifferent cutting conditions have been discussed. As cutting speed and feed rate increase, the meancutting forces and temperature show different progressions depending on the consideredmicrostructure. Results show that wear modes for cutting tools used in machining the Ti-555 alloyshow contrast from those exhibited by tools used in machining the Ti6AI4V alloy. In fact, onlyabrasion wear was observed for cutting tools in the case of machining the near-β titanium Ti-555alloy. The last alloy is characterized by a fine-sized microstructure (order of 1 μm). For the usualTi6Al4V alloy, adhesion and diffusion modes followed by coating delamination process on the toolsubstrate have been clearly identified. Moreover, a deformed layer was observed under secondaryelectron microscope (SEM) from the sub-surface of the chip with β-grains orientation along thechip flow direction. The analysis of the microstructure confirms the intense deformation of themachined surface and shows a texture modification, without phase transformation. For the Ti-555β-alloy, β grains experiences more plastic deformation and increases the microhardness of theworkpiece inducing then an abrasion wear process for cemented carbide tools. For the Ti6Al4Vmicrostructure, the temperature rise induces a thermal softening process of the workpiece andgenerates adhesive wear modes for cutting tools. The observed worn tool surfaces confirm theeffect of the microstructure on tool wear under different cutting conditions for the two studiedtitanium alloys.

scholarly journals A Review on Some Effects of the Electrolytic Deposited Zinc Oxide Multilayered Composite Coatings on Mild Steel

2019 ◽  
Vol 1378 ◽  
pp. 042052
Author(s):  
O. P Abioye ◽  
G. P Gaiya ◽  
O. S. I Fayomi ◽  
C. A Loto ◽  
A. J Musa
Keyword(s):  
Zinc Oxide ◽  
Mild Steel ◽  
Composite Coatings ◽  
Multilayered Composite
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