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.

Wear-Resistance of Nitrided W-Mo-High Speed Steel in Abrasive Wear Conditions

2013 ◽  
Vol 594-595 ◽  
pp. 1117-1121
Author(s):  
Мazhyn Skakov ◽  
Bauyrzhan Rakhadilov ◽  
Merey Rakhadilov
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Abrasive Wear ◽  
High Speed ◽  
Steel Surface ◽  
Plasma Nitriding ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Abrasive Wear Resistance ◽  
R6m5 Steel

In this work the influence of electrolytic-plasma nitriding on the abrasive wear-resistance of R6M5 high-speed steel were under research. We registered that after electrolytic-plasma nitriding on R6M5 steel surface modified layer is formed with 20-40 μm thickness and with increased microhardness of 9000-12200 MPa. Testing mode for the nitrided samples high-speed steel on abrasive wear developed. It is established, that electrolyte-plasma nitriding allows to increase wear-resistance of R6M5 steel surface layer comparing to original. It was determined that abrasive wear-resistance of R6M5 steel surface layer is increased to 25% as a result of electrolytic plasma nitriding. Thus, studies have demonstrated the feasibility and applicability of electrolytic-plasma nitriding in order to improve cutting tools work resource, working under friction and wear conditions.

The Study Wear Resistance of the Modified Surface of the Cutting Tool

2014 ◽  
Vol 548-549 ◽  
pp. 417-421 ◽  
Author(s):  
Anatoliy Stepanovich Vereschaka ◽  
Alexey Anatolevich Vereschaka ◽  
Mars S. Migranov
Keyword(s):  
Wear Resistance ◽  
Tool Life ◽  
Chemical Elements ◽  
Cutting Tools ◽  
Cutting Fluid ◽  
High Wear Resistance ◽  
Multilayer Coatings ◽  
Ion Nitriding ◽  
Coating Deposition ◽  
Modified Surface

One of the effective ways to improve the efficiency of cutting tools is the use of innovative types of multilayer coatings combining friction properties and high wear resistance. The object of study of this work was to investigate the influence of the composition of sublayer with anti-friction properties like component functional multilayer coatings on tool life. The data obtained in these studies were the basis for the development of the concept of functional multilayer coatings for cutting tools with programmable properties, providing an opportunity for each coating layer to perform a required function at a certain stage of tool wear. As used HSS substrate which is preliminarily subjected to ion nitriding by glow discharge and in addition alloyed gas-metal ions before coating deposition. The final step involved coating deposition process TiCrN using filtered cathodic vacuum arc deposition (FCVAD). Studies have shown that mixing the antifriction alloys which are widely used to improve friction properties allow to increase the tool life is not more than two times. This method of the tool life increase by reducing the shear strength of boundary adhesion between the tool and the work material does not seem to be the most effective for multilayered coatings under analysis, as for almost all studied anti-friction materials, the adhesion between the coating and the modified surface was rather low. This precludes their practical application due to technological reasons. Implantation the chemical elements can achieve much better results. Elements such as indium, silver and nitrogen increase tool life in 2 - 3 times for different cutting conditions (using dry cutting or cutting with cutting fluid). The obtained results can be considered as the most promising. Indium and silver are interactive with respect to Fe and may be used as lubricants in metal and promote a crushed chip forming at cutting using coating under the study. Ion surface modification of the tool with other studied elements demonstrates unstable or negative results that reduction in tool life or inability to provide good adhesion between the coating and substrate.

Tool Life and Wear Mechanism when Machining LM6 Aluminium (MMC) with Coated and Uncoated High Speed Steel

2015 ◽  
Vol 761 ◽  
pp. 262-266
Author(s):  
A. Siti Sarah ◽  
A.B. Mohd Hadzley ◽  
Raja Izamshah ◽  
Abu Abdullah
Keyword(s):  
Tool Life ◽  
Feed Rate ◽  
High Speed ◽  
Adhesive Wear ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Spindle Speed ◽  
Depth Of Cut ◽  
Radial Depth ◽  
Titanium Aluminium

This paper aims to study the tool life of coated and uncoated high speed steel (HSS) when machining LM6 aluminium. The experiment was carried out in dry condition with spindle speed of 5000 rpm and 6000 rpm, and feed rate of 90 mm/min and 120 mm/min. Axial and radial depth of cut remain constant at 0.5 mm and 1.0 mm, respectively during the experiment. Throughout the experiments, coated HSS showed higher tool life as compared to uncoated HSS due to the coating layer of titanium aluminium nitride (TiAlN) provides protection from rapid wear during machining. For both cutting tools, the optimum cutting parameter was recorded at 5000 rpm spindle speed, 90 mm/min feed rate, 0.5 mm axial depth of cut and 1.0 mm radial depth of cut. Some evidence of built up edge (BUE) formation were observed at most of cutting tools, showing the dominant wear mechanisms appear to be adhesive wear.

Wear resistance of high-speed steel cutting tools

2012 ◽  
Vol 32 (2) ◽  
pp. 186-188 ◽  
Author(s):  
V. M. Kishurov ◽  
V. N. Ippolitov ◽  
M. V. Kishurov
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Steel Cutting

Hardfacing of metal-cutting tools by arc welding in vacuum

2020 ◽  
Vol 2 (99) ◽  
pp. 49-56
Author(s):  
N.V. Ferdinandov ◽  
D.D. Gospodinov
Keyword(s):  
Wear Resistance ◽  
Heat Resistance ◽  
Arc Welding ◽  
High Speed ◽  
Metal Cutting ◽  
Microstructural Analysis ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Heat Treated ◽  
Better Than

Purpose: To present a technology for hardfacing of metal-cutting tools by arc welding in vacuum. Design/methodology/approach: The experiments were carried out using an installation for arc welding in vacuum. Objects of research were metal cutting tools (lathe knives), made of high-speed steel HS6-5-2 on a base metal of structural steel C45. The structure, hardness and wear resistance after hardfacing and after a triple tempering at 560°C have been determined. The heat resistance of the obtained instruments has been examined. Findings: The microstructural analysis showed that the structure of the built-up layer consisted of martensite, retained austenite and carbides. This was confirmed by the values of measured hardness after welding which were about 63-64 HRC. The triple tempering led to an increase in hardness by 3-4 HRC. It was found that the built-up layers (cutting edges of tools) retain their hardness (HRC=63-65) up to a temperature of 615-620°C, which shows that the heat resistance of the build-up layers was similar to that of the hardened and tempered tools of the same steel. The built-up work-pieces (excluding heat treated) and the reference knife showed the same cutting qualities at cutting speeds in the range of 55 to 120 m/min. It has been found that triple tempering after hardfacing led to increased wear resistance and consequently the durability of the tool also increased due to the higher hardness. Practical implications: The practical application is related to the production of metalcutting tools. Originality/value: The proposed technological method allows to produce defects free built-up layers. The cutting properties of the built-up in vacuum layers are comparable to or better than those of new tools made of steel HS 6-5-2.

Wear resistance of coated high-speed steel cutting tools

2012 ◽  
Vol 32 (1) ◽  
pp. 98-101
Author(s):  
V. M. Kishurov ◽  
V. N. Ippolitov ◽  
M. V. Kishurov ◽  
M. Yu. Nekrasova
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Steel Cutting

Study on Improving Cutting Tools Lifespan of W6Mo5Cr4V2 High-Speed Steel

2010 ◽  
Vol 139-141 ◽  
pp. 344-347
Author(s):  
Guang Ming Li ◽  
Li Yan ◽  
Shu Min Yu
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
High Speed ◽  
Treatment Process ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Heat Treatment Process ◽  
Waste Energy ◽  
New Treatment ◽  
Steel Heat

This paper mainly discusses the technique of using quenching at 1000°C and tempering at 650°C for 2 hours to replace the heat treatment process of quenching at 1225°C and tempering at 560°C for 1 hour for three times.Due to the old heat treatment process is traditional multifarious waste energy and relatively backward.The experiment results prove that after the new treatment using the W6Mo5Cr4V2 high-speed steel to make cutting tools such as cutters, drill, taps and so on. It aslo achieves better abrasion resistance and ductility. This meeting the objective of improving the wear resistance, toughness, lifespan enhancement and energy conservation.It opens up a new way of simple and energy saving for W6Mo5Cr4V2 high-speed steel heat treatment process.The material of W6Mo5Cr4V2 high-speed steel has certain value to research.

Effects of laser shock processing on abrasion resistance of high speed steel cutting tools

2019 ◽  
Vol 72 (6) ◽  
pp. 729-733
Author(s):  
Yujie Fan ◽  
Feng Xue ◽  
Yuankai Zhou ◽  
Yibin Dai ◽  
Pengfei Cui ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Service Life ◽  
Cutting Force ◽  
High Speed ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Content Type ◽  
Shock Processing

Purpose As a key basic component used in machining, high-speed steel (HSS) tools often prone to wear and failure during machining. Therefore, the purpose of this study is to adopt a suitable approach to improve the stability of the cutting force, the service life and the wear resistance. Design/methodology/approach Laser shock processing (LSP) was used to process the tool rake face and the tribological test was performed with ball-on-disk wear tester. Findings Experimental results show that cutting force of the LSP-treated tool is lower than untreated tool under the same cutting conditions. Wear rate of the tool nose treated by LSP decreases obviously and the tool life increases by 40 per cent. Originality/value HSS is often used in the manufacture of complex cutting tools. The main value of this article is to improve the tool surface wear resistance, thereby extending the service life of cutter. This paper is valuable not only in theory but also with reference value in engineering practice.

Effect of residual elements on the machinability of leaded free machining steels

1980 ◽  
Vol 295 (1413) ◽  
pp. 87-88 ◽  
Keyword(s):  
Wear Rate ◽  
Tool Wear ◽  
Tool Life ◽  
High Speed ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Tool Material ◽  
High Speed Steel ◽  
Low Carbon ◽  
Wear Rates

The machinability of a material can be defined in terms of the wear rate of the cutting tool used to machine the material. The lower the tool wear rate or the greater the tool life the better the machinability. The wear processes of cutting tools are complicated, but recent work has shown that cutting tool wear rates during machining can be directly related to tool material wear rates when rubbing in a modified crossed cylinder wear experiment (Mills & Akhtar 1975). The wear of cutting tools can be simulated by simple experiments. Here I present results on the effect of total residual levels in leaded low carbon free machining steels on the tool life of M2 high speed steel. The results will be discussed in terms of a simple wear model.

A Promising Method for Improving Wear Resistance of Metal Cutting Tools

2015 ◽  
Vol 788 ◽  
pp. 325-329
Author(s):  
Alexander G. Ovcharenko ◽  
Andrey Yu. Kozlyuk ◽  
Mikhail O. Kurepin
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Metal Cutting ◽  
Cutting Tools ◽  
Experimental Studies ◽  
Practical Interest ◽  
High Speed Steel ◽  
Promising Method ◽  
Steel R6m5 ◽  
Machine Parts

Abstract. A promising method for improving wear resistance of metal cutting tools including pre-heating and a subsequent impact of the pulsed magnetic field of high intensity on the cutting tool is proposed. The experimental setup and methods of research are described. Experimental studies of surfaces of carbide reversible cutting plates of the VK8, T15K6 alloy and drills of high speed steel R6M5 to assess the effectiveness of the proposed method were performed. An increase in wear resistance of cutting tools made of the T15K6 hard-alloy plates by 30% and made of the VK8 alloy plates by 13% was revealed while wear resistance of drills made of steel R6M5 increased on average by 58% The proposed method can be of practical interest for hardening the surface of other types of tools and machine parts for further experimental verification.

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