Study of Properties of Nanostructured Multilayer Composite Coatings of Ti-TiN-(TiCrAl)N and Zr-ZrN-(ZrNbCrAl)N

2016 ◽  
Vol 40 ◽  
pp. 90-98 ◽  
Author(s):  
Alexey Anatolevich Vereschaka ◽  
Anatoliy Stepanovich Vereschaka ◽  
Jury I. Bublikov ◽  
Anatoliy Y. Aksenenko ◽  
Nikolay N. Sitnikov
Keyword(s):  
Tool Life ◽  
Cutting Tool ◽  
Composite Coatings ◽  
Tool Material ◽  
Multilayer Composite ◽  
Functional Coatings ◽  
Surface Layers ◽  
X Ray ◽  
Resistant Layer ◽  
Nanostructured Multilayer Composite Coatings

The structures of surface layers of the tool material, adapted to the conditions of the thermomechanical loading during the cutting process, can be formed with the use of different processing methods, the most effective of which is to deposit functional coatings on working surfaces of the cutting tool. During the studies, two nanostructured multilayer composite coatings (NMCCs) were considered: Ti-TiN-(TiCrAl)N and Zr-ZrN-(ZrNbCrAl)N. Metallographic studies were conducted, and the phase compositions of the coatings were determined by X-ray crystal analysis. The efficiency of tools made of carbide T14K8 with developed coatings was determined by comparative evaluation of tool life of a tool without coating, a tool with standard coating (TiN), and a tool with elaborated coatings (Ti-TiN-(TiCrAl)N and Zr-ZrN-(ZrNbCrAl)N) in turning structural steel 45. These tests allow noting the increase in tool life of a tool with elaborated NMCCs by up to 4 times as compared with tool life of an uncoated tool and by up to 2 times as compared with tool life of standard coating TiN. Meanwhile, NMCC of Ti-TiN-(TiCrAl) showed lifetime about 10% longer than NMCC of Zr-ZrN-(ZrNbCrAl)N). The longer lifetime of NMCC of Ti-TiN-(TiCrAl) conforms to its better adhesion characteristics and thinner nanosublayers of its wear-resistant layer.

Development of Technological Means for Formation of Multilayer Composite Coatings, Providing Increased Resistance of Carbide Tools, for Different Machining Conditions

2013 ◽  
Vol 581 ◽  
pp. 55-61 ◽  
Author(s):  
Vladimir P. Tabakov ◽  
A.S. Vereschaka
Keyword(s):  
Rational Choice ◽  
Tool Life ◽  
Cutting Tool ◽  
Composite Coatings ◽  
Multilayer Coating ◽  
Multilayer Composite ◽  
Carbide Tool ◽  
Carbide Cutting Tool ◽  
Tool Edge ◽  
Technological Means

The present work documents the results of development a methodological and technological means for the formation of multilayer composite coatings essential to increasing the tool life of a cemented carbide cutting tool edge. A methodology, based on of a rational choice of structure, architecture, and properties of a multilayer coating for tool edge working in various cutting conditions, is formulated. The results demonstrate an increase of efficiency of the carbide tool edge life based on the methodology stated above, and are presented here.

scholarly journals Nanostructured Multilayer Composite Coatings for Cutting Tools

2020 ◽  
Author(s):  
Sergey Grigoriev ◽  
Alexey Vereschaka ◽  
Marina Volosova ◽  
Caterina Sotova ◽  
Nikolay Sitnikov ◽  
...  
Keyword(s):  
Composite Coatings ◽  
Cutting Tools ◽  
Theoretical Background ◽  
Multilayer Composite ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Ceramic Tools ◽  
Operation Conditions ◽  
Resistant Layer ◽  
Nanostructured Multilayer Composite Coatings

The chapter deals with the specific features concerning the application of wear-resistant coatings to improve the performance properties of ceramic cutting tools. The paper discusses the theoretical background associated with the specific operation conditions and wear of ceramic cutting tools and influencing the choice of the compositions and structures of wear-resistant coatings. The studies were focused on the application of the Ti-(Ti,Al)N-(Zr,Nb,Ti,Al)N multilayer composite coating with a nanostructured wear-resistant layer, as well as the (Cr,Al,Si)N–(DLC–Si)–DLC–(DLC–Si) and (Cr,Al,Si)N–DLC composite coatings in order to improve the cutting properties of ceramic tools. The chapter presents the results of the comparative cutting tests for the tools with the coatings under study, uncoated tools, and tools with the Ti-(Ti,Al)N commercial coating. The wear mechanisms typical for ceramic cutting tools with coatings of various compositions have been investigated.

Methods of Forecasting Wear Resistance of Cutting Tools Based on the Properties of their Materials

2014 ◽  
Vol 682 ◽  
pp. 491-494 ◽  
Author(s):  
Vladislav Bibik ◽  
Elena Petrova
Keyword(s):  
Tool Life ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Chemical Properties ◽  
Tool Material ◽  
Composition Structure ◽  
Metal Cutting Tool ◽  
Physical And Chemical ◽  
Thermo Physical Properties

The author considers methods of forecasting metal-cutting tool life based on characteristics of cutting tool material. These characteristics depend on differences in numerical values of physical and chemical properties of tool material due to changes in its composition, structure, and production process variables. The described methods allow obtaining the information necessary for forecasting the tool life beyond the process of cutting, for example at the stage of cutting tool manufacturing. The author suggests using the method of registration of thermo-physical properties of the tool material as a promising forecasting technique.

scholarly journals Improving operational characteristics of tool from tungsten-free carbides (cermets) by nanostructured multilayer composite coatings.

2014 ◽  
Vol 2014 (3) ◽  
pp. 20-25 ◽  
Author(s):  
Алексей Верещака ◽  
Aleksey Vereshchaka ◽  
Ойбек Хожаев ◽  
Oybek Khozhaev
Keyword(s):  
Cutting Tool ◽  
Composite Coatings ◽  
Layered Composite ◽  
Constructional Steel ◽  
Vacuum Arc ◽  
Operational Characteristics ◽  
Vacuum Arc Deposition ◽  
Filtered Cathodic Vacuum Arc ◽  
Nanostructured Multilayer Composite Coatings ◽  
Arc Deposition

This paper discusses the issues of improving the efficiency of cutting tool made of tungsten-free carbides (cermets) by using nano-dispersed multi-layered composite coatings formed by use of innovative processes of filtered cathodic vacuum arc deposition (FCVAD). Developed composi-tions of nano-structured multi-layered composite coatings contributes to significant improvement of properties of cutting tool made of cermets in cutting constructional steel and expansion of their application area for machining of heat-resistant alloys.

Characterization of WC-VC-Co Cemented Carbides Using Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDS)

1997 ◽  
Vol 3 (S2) ◽  
pp. 717-718
Author(s):  
F. Arenas ◽  
I. B. de Arenas ◽  
J. Ochoa ◽  
S. A. - Cho
Keyword(s):  
Cutting Tool ◽  
Tool Material ◽  
Liquid Phase Sintering ◽  
Cemented Carbides ◽  
Metal Carbides ◽  
Vacuum Sintering ◽  
X Ray ◽  
Transition Metal Carbides ◽  
Cylindrical Samples

The two important constituents of metallic tool alloys are transition metal carbides and metals of the iron group, Fe, Ni, Co. Combining them, based on WC, it is obtained a hard and tough cutting tool material. Many attempts have been made to develop alternative cemented carbide systems by substituting a portion of WC by other hard phases. In this investigation, microstructure and phases composition of 90 mass% [ (1-y) WC - y VC ] - 10 mass% Co with y = 0, 0.2, 0.4, 0.6 and 1.0 sintered cemented carbides were studied by Backscattering electron (BSE) compositional images, elemental dot maps and X - ray microanalysis. These techniques have allowed to determine the different phases present, their morphology and composition.Cylindrical samples of 10 mm. in diameter and height were manufactured by vacuum sintering at 1400°C of uniaxially pressed compacts at 350 MPa. Liquid phase sintering is the predominant consolidation mechanism present in this system.

scholarly journals Influence of the Thickness of Multilayer Composite Nano-Structured Coating Ti–TiN–(Ti,Al,Si)N on the Tool Life of Metal-Cutting Tools and the Nature of Wear

Coatings ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 730 ◽  
Author(s):  
Alexey Vereschaka ◽  
Sergey Grigoriev ◽  
Nikolay Sitnikov ◽  
Anatoliy Aksenenko ◽  
Filipp Milovich ◽  
...  
Keyword(s):  
Tool Life ◽  
Metal Cutting ◽  
Cutting Tools ◽  
Multilayer Composite ◽  
Scratch Testing ◽  
Wear Resistant ◽  
And Performance ◽  
Resistant Layer ◽  
Carbide Inserts ◽  
Cutting Speeds

This article discusses the influence of the thickness of a nano-structured wear-resistant layer of the Ti–TiN–(Ti,Al,Si)N multilayer composite coating on its mechanical and performance properties. The study was focused on the coatings with the following thicknesses of its wear-resistant layers: 2, 3.5, 5, 7, 11, and 15 μm. The relation between the thickness of a wear-resistant layer and the time of its deposition was investigated, and the effect of the above thickness on hardness and wear resistance in scratch testing was considered. Cutting tests were conducted in turning steel C45 with carbide inserts with the coatings under study at various cutting speeds (vc = 250, 300 and 350 m/min). The study found the value of thickness of wear-resistant layer providing the longest tool life at various cutting speeds. The differences in the nature of wear for the coatings with various thicknesses of wear-resistant layers were considered.

Modification of Structure and Properties of Steel Р6М5 at Electrolyte Plasma Treatment

2012 ◽  
Vol 601 ◽  
pp. 64-68 ◽  
Author(s):  
Маzhyn Skakov ◽  
Bauyrzhan Rakhadilov ◽  
Michail Scheffler
Keyword(s):  
Plasma Treatment ◽  
Comparative Research ◽  
Mechanical Characteristics ◽  
Cutting Tool ◽  
Structure And Properties ◽  
Surface Layers ◽  
Treatment Technology ◽  
X Ray ◽  
Electron And Light Microscopy ◽  
Modified Surface

Mechanical characteristics of nitrated and carbonitriding in electrolyte plasma steel Р6М5 surface layers are investigated in the research. It shows perspectiveness of the cutting tool electrolyte-plasma treatment technology. Comparative research of structure, phase composition of fast-cutting P6M5 steel modified surface layers after electrolyte plasma treatment was carried out by scanning-electron and light microscopy, and X-ray structure analysis methods.

scholarly journals Formation and Investigation of Plasma Powder Coatings Made of Oxide Ceramics Modified with High-Energy Effects

2018 ◽  
Vol 17 (5) ◽  
pp. 378-389 ◽  
Author(s):  
V. A. Okovity ◽  
F. I. Panteleenko ◽  
V. V. Okovity ◽  
V. M. Astashinsky ◽  
V. V. Uglov ◽  
...  
Keyword(s):  
Surface Layer ◽  
Zirconium Dioxide ◽  
Composite Coatings ◽  
High Energy ◽  
Morphological Properties ◽  
Multilayer Composite ◽  
Plasma Flows ◽  
Near Surface ◽  
Compression Plasma Flows ◽  
X Ray

The paper presents results of studying structure and properties of multilayer composite coatings optimized for their composition based on zirconium dioxide materials used for deposition of plasma coatings on the models of elements for anti-meteor shielding screens. The influence of plasma jet parameters (current, distance of sputtering, consumption of plasma-forming nitrogen gas) and fractional composition of an initial powder on characteristics of two-layer composite coatings based on nickel-chromium-aluminum-yttrium and zirconium dioxide on the elements of protective screens has been analyzed in the paper. Optimization has been carried out on the basis of obtaining maximum coefficient of powder utilization. The investigations have made it possible to ascertain specific features of elemental and phase composition, surface morphology, microstructure multilayer composite coatings on the basis of a solid layer of metal oxides and a viscous transition sub-layer subjected to compression plasma flows. The investigations have been executed with the help of scanning electron microscopy, energy dispersive x-ray spectral microanalysis, and x-ray diffraction analysis. It has been shown on the basis of the obtained results that the effect of compression plasma flows on multilayer composite coatings leads to a modification of a near-surface layer with a thickness up to 15 μm that presupposes its melting and subsequent high-speed crystallization which together provide an increase in its density, decrease in porosity while maintaining the initial phase state. Liquid-phase processes in the molten phase of the near-surface layer permit to modify morphological properties of the surface which are associated with its smoothing and lowering of roughness.

Enhancing the durability of cutting carbide tools by controlling the state and properties of its surface layers using complex chemical and thermal treatment

2020 ◽  
Author(s):  
E.E. Bobylyov
Keyword(s):  
Cutting Tool ◽  
Diffusion Coating ◽  
Roughness Parameter ◽  
Field Tests ◽  
Sharp Change ◽  
Functional Coatings ◽  
Surface Layers ◽  
Metal Melts ◽  
Product Surface

A current way of increasing cutting efficiency in the turning operation is applying functional coatings based on carbides, nitrides, carbonitrides, etc. on the cutting tool surface. Most technologies for applying functional coatings are supposed to use technically sophisticated, expensive equipment. In addition, the coatings have a sharp change in properties at the coating-coated material boundary. The technology of diffusion saturation from the medium of low-melting liquid metal melts lacks these disadvantages. The aim of the work was to study the effect of the formation of a coating based on titanium carbide on the surface of a cutting tool made of hard TiC-WC-Co and WC-Co alloys on its wear resistance and the quality of the product surface after turning. The research methods included field tests, micro-x-ray spectral analysis, optical microscopy, and microdurametric tests. The paper presents the results of research of turning of materials of various cutting group using a carbide tool with a functional diffusion coating obtained due to saturation in the melt containing Pb, Bi, Li, Ti. The resulting coatings had a thickness of 3-6 microns, and contributed to an increase in tool life up to 7.4 times compared to the tools with PVD coating and tools without coatings as well as a decrease of the roughness parameter Ra of the treated surface up to 2 times.

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