scholarly journals MATHEMATICAL MODELING OF GROUND FRICTION SURFACE WEAR PROCESS

2016 ◽  
Vol 2016 (2) ◽  
pp. 6-12
Author(s):  
Сергей Бишутин ◽  
Sergey Bishutin ◽  
Анатолий Суслов ◽  
Anatoliy Suslov
Keyword(s):  
Mathematical Modeling ◽  
Wear Resistance ◽  
Surface Layer ◽  
Friction Surface ◽  
Structural Phase ◽  
Surface Wear ◽  
Factors Affecting ◽  
Wear Process ◽  
Force Impact ◽  
Friction Surfaces

Many factors affecting considerably surface wear cannot be taken into account within the bounds of existing approaches to the mathematical description of this process. It is wellknown that the modes of finish grinding have a significant influence upon wear resistance of a friction surface. It is explained, for example, by differences in a structural – phase state of a surface layer formed in the course of thermal and force impact of abrasion. Therefore, for reliable fore-casting of the resource of many tribo-couplings it is necessary to estimate friction surface wear resistance taking into account the influence of conditions and modes of finishing abrasion. The mathematical modeling of the process un-der consideration allowed obtaining an equation for the computation of a wear rate of run-in ground friction surfaces and nonrunin ones in which pressure in a contact, slip velocity, abrasion modes, form errors in a friction surface and also a state of a surface layer and a position error of a friction surface in a coupling are taken into account. Experimental researches have confirmed a possibility of use in practice the mathematical depen dences obtained. The researches carried out allow forecasting more reliably ground friction surface wear of machinery and mechanisms.

scholarly journals Science intensive grinding technology ensuring life increase in machinery friction surfaces

2021 ◽  
Vol 2021 (4) ◽  
pp. 33-37
Author(s):  
Sergey Bishutin
Keyword(s):  
Wear Resistance ◽  
Surface Finish ◽  
Friction Surface ◽  
Surface Wear ◽  
New Approach ◽  
Friction Surfaces

A new approach to the realization of machinery friction surface finish grinding ensuring parts life increase is offered. There are shown results of experiments on working mode impact upon surface wear-resistance. A procedure for the choice and correction of friction surface finish-grinding modes taking into account wear-resistance required is presented.

Technology of sliding friction surface machining based on hard wear-resistant coating use taking into account technological inheritance impact

2020 ◽  
Vol 2020 (12) ◽  
pp. 31-38
Author(s):  
Tatiana Mihalenko
Keyword(s):  
Wear Resistance ◽  
Friction Surface ◽  
Sliding Friction ◽  
Quality Parameters ◽  
Surface Machining ◽  
Technological Support ◽  
Coating Application ◽  
Technological Inheritance ◽  
Theoretical Investigations ◽  
Friction Surfaces

The matters of technological support of wear-resistance for sliding friction surfaces are considered. The results of experimental theoretical investigations of modes impact of preliminary machining, coating application and sliding friction surfaces finishing upon their quality parameters are shown.

scholarly journals Wear resistance of geosynthetic interfaces constituted by geomembranes and geospacers

2013 ◽  
Vol 66 (2) ◽  
pp. 227-232
Author(s):  
Heraldo Nunes Pitanga ◽  
Orencio Monje Vilar ◽  
Jean-Pierre Gourc
Keyword(s):  
Experimental Study ◽  
Wear Resistance ◽  
Service Condition ◽  
Surface Wear ◽  
Direct Effects ◽  
Test Device ◽  
Wear Process ◽  
Ramp Test ◽  
The Stability ◽  
Effect Of Surface

This article presents the results of an experimental study which aimed to evaluate the effect of surface wear on the friction properties of geosynthetic interfaces constituted of geomembranes and geospacers. The tests were performed in ramp test device, and the results showed the different sensitivities of the interfaces to the wear process. For the particular types of interfaces considered in the experiment, the surface wear can increase, decrease or maintain the original friction properties of the geosynthetic interface, with direct effects on the stability under service condition.

Tribological Characteristics of Nano Structured Nickel Coatings for Renivating of Extruding Shafts

2012 ◽  
Vol 217-219 ◽  
pp. 221-225 ◽  
Author(s):  
Dimitar Karastoyanov ◽  
Todor Penchev ◽  
Mara Kandeva
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Contact Interaction ◽  
Dry Friction ◽  
Experimental Results ◽  
Tribological Characteristics ◽  
Resistance Testing ◽  
Temperature Changes ◽  
Wear Process ◽  
Nickel Coatings

The methods for wear resistance testing is described and the experimental results for the dependence of the massive wear, wear speed, intensity of wear and wear resistance on the friction road and the time of a contact interaction are obtained. A testing micromanipulator with piezo actuators for measuring the roughness of the surface layer is developed. A methodology for thermographic testing and experimental results for wear and temperature changes in the contact by the wear process of the coatings under dry friction and abrasion is obtained

Influence of Structural Phase State of the Surface Layer on Wear Resistance of Cutting Edge of Metal-Ceramic Insert when Metalcutting

2014 ◽  
Vol 682 ◽  
pp. 530-536 ◽  
Author(s):  
A.S. Ignatyev ◽  
А.A. Mokhovikov ◽  
V.E. Ovcharenko
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Electron Beam ◽  
Phase State ◽  
Structural Phase ◽  
Structural Phase State ◽  
Electron Beam Processing ◽  
Metal Ceramic ◽  
Ceramic Insert ◽  
Alloy Surface Layer

The paper considers frictional aspects of wear of metal ceramic insert working faces when metalcutting depending on structural phase state of their surface layers.Keywords: metal-ceramic alloy, surface layer, structural phase state, electron-beam processing, resistance of metal-ceramic insert when cutting metal.

Wear resistance of hydrogenated high nitrogen steel at dry and solid state lubricants assistant friction

2019 ◽  
Vol 2 (98) ◽  
pp. 57-67
Author(s):  
O.A. Balitskii ◽  
V.O. Kolesnikov ◽  
A.I. Balitskii
Keyword(s):  
Wear Resistance ◽  
Diffraction Analysis ◽  
Friction Surface ◽  
Rolling Friction ◽  
X Ray Diffraction ◽  
High Nitrogen ◽  
X Ray ◽  
Nitrogen Steel ◽  
Nitrogen Steels ◽  
Friction Surfaces

Purpose: This paper is devoted the investigation hydrogen influence on of wear resistance of high nitrogen steel (HNS) at dry and solid state lubricants assistant friction. It has been established that after hydrogenation at 250 N loading the wear rate increased by 2.9 ... 4.1 times. Microhardness of hydrogenated layer was 7.6 ... 8.2 GPa, that is increased after hydrogenation in two times. After adding the (GaSe)xIn1-x compounds to the tribo conjugates by X-ray diffraction analysis it has been established the appearance of new phases which formed during the friction process and detected on the friction surface. Design/methodology/approach: This work presents research results concerning the comparative tests of high nitrogen steels in the circumstances of dry rolling friction. It was conducted the experiments to determine the tribological properties of high-nitrogen steels under rolling friction. The test pieces were manufactured in the form of rollers, and rotated with a linear velocity 2.27 m/s (upper roller), 3.08 m/s (bottom roller). Upper roller is made from HNS was subjected for hydrogenation. Analysis of friction surfaces indicates the complex mechanism of fracture surfaces. The results of the local X-ray analysis and X-ray diffraction analysis has been established the appearance of new phases and elements on the friction surface. Findings: It has been found that the level of wear resistance of the investigated materials under hydrogenation. Compounds realize chemisorption, tribochemical mechanisms of the formation of thin protective (anti-wear, antifriction) layers on metal surfaces. Research limitations/implications: An essential problem is the verification of the results obtained using the standard mechanical tests, computer-based image analysis and other methods. Practical implications: The observed phenomena can be regarded as the basic explanation of reduces the plasticity characteristics after hydrogenation. Applying the (GaSe)xIn1-x compounds as a lubricant will allow the formation of films on friction surfaces that can minimize surface wear, which will contribute to the transition to a wear-free friction mode. The protective film is a barrier to high shear and normal loads, preserving the base metal of the part and providing reduced wear and friction. Originality/value: The value of this work is that conducted experiments permit to determine the tribological properties of high nitrogen steels under rolling friction after hydrogenation. After adding (GaSe)xIn1-x compounds to the tribo conjugates after due to X-ray diffraction analysis it has been established the appearance of new phases which formed during the friction process and detected on the friction surface.

Laser Modification: Increasing the Wear Resistance of Friction Surfaces

2020 ◽  
Vol 836 ◽  
pp. 104-110
Author(s):  
V.I. Shastin ◽  
S.K. Kargapol’tsev
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Theoretical Model ◽  
Laser Processing ◽  
Microstructural Analysis ◽  
Friction Units ◽  
Special Surface ◽  
Machine Parts ◽  
Friction Surfaces ◽  
Tribological Parameters

The article deals with topical issues of studying the physical, mechanical and tribological parameters of the surface layer of machine parts subjected to laser processing. Various options for modifying mating surfaces are evaluated and analyzed. The data of microstructural analysis and indicators of wear resistance are presented. A theoretical model of the wear of heat-strengthened surfaces is proposed, explaining the mechanism for increasing their wear resistance as a result of homogenization of the microstructure of a special surface layer with increased bearing capacity. It is experimentally confirmed that the greatest wear resistance is observed in friction units during mutual modification of mating surfaces.

Improvement of Friction Surface Wear Resistance by Plasma Treatment

2017 ◽  
Vol 53 (5-6) ◽  
pp. 406-411 ◽  
Author(s):  
A. S. Tyuftyaev ◽  
V. B. Mordynskii ◽  
N. O. Spector ◽  
M. G. Frolova
Keyword(s):  
Wear Resistance ◽  
Plasma Treatment ◽  
Friction Surface ◽  
Surface Wear

THE ANALYSIS OF THE INFLUENCE OF LASER HEAT TREATMENT OF THE CRANKSHAFT JOURNAL ON WEAR RESISTANCE OF THE BEARING

Tribologia ◽  
2016 ◽  
Vol 266 (2) ◽  
pp. 87-100 ◽  
Author(s):  
Marta PACZKOWSKA
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Laser Treatment ◽  
Friction Pair ◽  
Rapid Change ◽  
Wear Test ◽  
Test Results ◽  
Test Load ◽  
Wear Process ◽  
Stabilization Period

The aim of the presented research was to evaluate wear effects of bearing elements in case of modification based on laser alloying with boron of journal surface layer. The research was performed on ZPG-IV tribology tester with journal-bearing friction pair. During the test load was applied progressively. SEM microscopes and non-contact 3D optical profilografometr was used to assess the test results. Study of the character of the wear process allowed to state, that after each increase of load during the test, rapid change of the value of oil temperature and the value of resistance in journal-pan contact was appeared. Then, the stabilization period was followed by. Some differences in the way of those processes between tested variants were noticed. Firstly, during the stabilization period larger thickness of the oil film at the journal-pan interface was notice in case of journal after laser treatment than in case of untreated journal. Secondly, it could be expected that oil temperature will be lower in case of longer time of tribological test for treated journal (than for untreated journal). It should favor better wear resistance of this kinematic node. Macro and microscopic observations of both types of surface after wear test allow to state, that journals after laser treatment were characterized by less wear effects, as cavities in the surface layer in comparison to untreated journals. More intensive wear of journals without treatment was confirmed by stereometric research and measurements of surface roughness parameters. This research allow to state positive laser treatment influence on the wear resistance of the journal. Although, there was no larger loss of the surface layer in case of pans after cooperation with hard journal after laser treatment (describe by the decrease of pans’ thickness) then loss of the surface layer in case of pans after cooperation with softer untreated journal (nearly 5-times softer than the surface layer of treated journal), the microscopic observations and measurement of the parameters of stereometric structure of their surface showed more intensive wear of pan after cooperation with treated journal.

scholarly journals High technology of wear-resistance increase in friction surfaces of machinery operating in hydrogen environment

2017 ◽  
Vol 2 (2) ◽  
pp. 19-24 ◽  
Author(s):  
Анатолий Суслов ◽  
Anatoliy Suslov ◽  
Михаил Шалыгин ◽  
Mikhail Shalygin
Keyword(s):  
Wear Resistance ◽  
High Technology ◽  
Surface Wear ◽  
Friction Couple ◽  
Surface Layers ◽  
Hydrogen Environment ◽  
Resistance Increase ◽  
Machine Parts ◽  
Friction Surfaces ◽  
Wear Tests

In the paper there is considered a problem of wear-resistance increase in parts operating in hydrogen environment. The dependence of friction surface wear taking into account their sub-roughness and hydrogen existence is shown. A technology for a friction couple wear-resistance increase is offered including surface layer granularity decrease, the reduction of hydrogen content in an inter-grain space and the introduction in the structure of parts surface layers the elements allowing filling up an inter-grain space. The results of comparative wear tests for different technologies for wear-resistance increase are shown. It is defined that the technology offered allows increasing wear-resistance in friction surfaces in machine parts. A method for account of hydrogen existence in an inter-grain space is offered and a reasonable method for obtaining a numerical value of a factor taking into account hydrogen presence used for theoretical computations.

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