М. І. Pashechko
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View article: Cavitation-erosion resistance of eutectic coatings in sodium chloride solution
Cavitation-erosion resistance of eutectic coatings in sodium chloride solution Open
The paper presents original research results related to the resistance of proprietary eutectic coatings applied to C45 structural steel to cavitation-erosion wear. This type of wear is encountered in devices operating in the chemical, petr…
View article: Investigation into the Contamination of Soil With Multiple Components in the Vicinity of Municipal Solid Waste Landfills
Investigation into the Contamination of Soil With Multiple Components in the Vicinity of Municipal Solid Waste Landfills Open
Here determination of the level dimensions regularity of the multicomponent contamination zones (by heavy metals and petroleum products) of the soils adjacent to the municipal solid waste landfill. The dependences of the mercury, copper an…
View article: Study of the Influence of Cavitation and Magnetic Field on the Change of Water Properties and its Purification in a Vibrating Machine with Determination of Drive Modes
Study of the Influence of Cavitation and Magnetic Field on the Change of Water Properties and its Purification in a Vibrating Machine with Determination of Drive Modes Open
The paper presents the results of research into the influence of low-frequency sound and magnetic fields on the change in the properties of water and its purification in a vibrating machine with an eccentric drive, which allows obtaining a…
View article: An Analytical–Numerical Model for Determining “Drill String–Wellbore” Frictional Interaction Forces
An Analytical–Numerical Model for Determining “Drill String–Wellbore” Frictional Interaction Forces Open
Currently, drilling of directional oil and gas wells under complex technical-technological and mining-geological conditions requires the use of drill pipes made of various materials. In turn, to choose rational modes of strengthening drill…
View article: Dynamic Processes of Substructural Rearrangement under Friction of Carbon Steel
Dynamic Processes of Substructural Rearrangement under Friction of Carbon Steel Open
The effect of heat treatment (tempering temperature after quenching) of medium carbon steels (steel 45 and steel 50) on tribological indicators at sliding friction without lubrication in connection with the change in strength and rheologic…
View article: Improving the Wear-Resistance of BT22 Titanium Alloy by Forming Nano-Cellular Topography via Laser-Thermochemical Processing
Improving the Wear-Resistance of BT22 Titanium Alloy by Forming Nano-Cellular Topography via Laser-Thermochemical Processing Open
This paper studies the microstructure, phase composition and tribological response of BT22 bimodal titanium alloy samples, which were selectively laser-processed before nitriding. Laser power was selected to obtain a maximum temperature ju…
View article: Characteristic Features of Structure and Analysis of Friction Behavior of Electric-Spark Coatings from Powder Wires
Characteristic Features of Structure and Analysis of Friction Behavior of Electric-Spark Coatings from Powder Wires Open
The structure, phase and chemical composition of electric-spark coatings (ESC) obtained on the Elitron installation from powder electrode wires were investigated using a Neophot-2 optical computer microscope, an EVO-40XVP (Carl Zeiss) scan…
View article: Triboanalysis of Antifrictional Materials Based on Polyamides for Metal-Polymer Sliding Bearings
Triboanalysis of Antifrictional Materials Based on Polyamides for Metal-Polymer Sliding Bearings Open
Для характеризации антифрикционных свойств полиамидов и композитов на их основе, используемых в самосмазываемых металлополимерных подшипниках скольжения, предложен экспериментально-теоретический метод трибоанализа.Экспериментально определе…
View article: Microstructure and Friction Response of a Novel Eutectic Alloy Based on the Fe-C-Mn-B System
Microstructure and Friction Response of a Novel Eutectic Alloy Based on the Fe-C-Mn-B System Open
This paper focuses on the microstructure and tribological properties of novel hardfacing alloy based on Fe-C-Mn-B doped with Ni, Cr, and Si. The 4 mm-thick coating was deposited on the AISI 1045 carbon steel by the MIG-welding method using…
View article: Phase Equilibrium and Microstructure Examinations of Eutectic Fe-C-Mn-B Alloys
Phase Equilibrium and Microstructure Examinations of Eutectic Fe-C-Mn-B Alloys Open
In this study, we analyzed the quaternary Fe-C-Mn-B system to create new eutectic cast alloys for coating deposition and additive manufacturing. Experimental samples were fabricated via the wire arc manufacturing method with argon shieldin…
View article: Investigation of the Effect of Young’s Modulus on the Contact Strength of Metal Polymer Plain Bearings
Investigation of the Effect of Young’s Modulus on the Contact Strength of Metal Polymer Plain Bearings Open
Using the author's method of research of hybrid (metal-polymer) plain bearings the calculation of their load carrying capacity (contact pressures) is carried out. Studies have been conducted for metal-polymer bearings with a bushing of two…
View article: Study of the Influence of Temperature on Contact Pressures and Resource of Metal-Polymer Plain Bearings with Filled Polyamide PA6 Bushing
Study of the Influence of Temperature on Contact Pressures and Resource of Metal-Polymer Plain Bearings with Filled Polyamide PA6 Bushing Open
It is known that the elastic characteristics of polyamides change with increasing temperature; in particular, the Young’s modulus decreases significantly. This fact is practically not taken into account in design calculations of metal-poly…
View article: A Comparative Study of Tribological Behavior of Moglice and Dk-6(Pt) Composites
A Comparative Study of Tribological Behavior of Moglice and Dk-6(Pt) Composites Open
The authors have produced new polymer-based composite material DK-6(PT) for substitution of Moglice (Diamant) polymer. We manufactured and used sliding-friction test apparatus (pin-on-disc) capable of testing three specimens simultaneously…
View article: Calculation of Contact Pressures in Cylindrical Metal-Polymer Sliding Guides
Calculation of Contact Pressures in Cylindrical Metal-Polymer Sliding Guides Open
Guides (linear plain bearings) of reciprocating motion are widely used in many areas of human activity. However, at present there are no reasonable methods for their calculation, in particular metal-polymer guides. The author's method of c…
View article: Influence of Temperature on Contact Pressures and Resource of Metal-Polymer Plain Bearings with the Filled Polyamide PA6 Bushing
Influence of Temperature on Contact Pressures and Resource of Metal-Polymer Plain Bearings with the Filled Polyamide PA6 Bushing Open
It is known that the elastic characteristics of polyamides change with increasing temperature, in particular, the Young's modulus decreases significantly. This fact is practically not taken into account in design calculations of metal-poly…
View article: Influence of Heavy Weight Drill Pipe Material and Drill Bit Manufacturing Errors on Stress State of Steel Blades
Influence of Heavy Weight Drill Pipe Material and Drill Bit Manufacturing Errors on Stress State of Steel Blades Open
Drilling volumes should be increased in order to increase hydrocarbon production, but this is impossible without the usage of high-quality drilling tools made of modern structural materials. The study has to analyze the design, technologic…
View article: The Synthesis of Dwell Mechanisms on the Basis of Straight-Line Linkages with Fivefold Interpolation Nodes
The Synthesis of Dwell Mechanisms on the Basis of Straight-Line Linkages with Fivefold Interpolation Nodes Open
The paper deals with the problem of kinematic synthesis of dwell linkage mechanisms which are based on the four-bar linkage with a coupler point that traces a curve with a straight-line part. It enables to obtain a dwell of the output link…
View article: To the Question of Calculation of Contact Pressure in MetalPolymer Plain Bearings During Wear
To the Question of Calculation of Contact Pressure in MetalPolymer Plain Bearings During Wear Open
A method for calculating hybrid (metal-polymer) plain bearings for contact strength (bearing capacity) is
View article: Analysis of Wear Resistance of Borided Steel C45
Analysis of Wear Resistance of Borided Steel C45 Open
The wear resistance of diffusion coatings in conditions of specific pressures of 3, 7 and 10 MPa was studied. The boride coatings were prepared by means of diffusion methods using C45 steel as the substrate material. Research on the micros…
View article: On the Question of Methodology of Hybrid Sliding Bearings Estimated Load Capacity and Durability Evaluation
On the Question of Methodology of Hybrid Sliding Bearings Estimated Load Capacity and Durability Evaluation Open
The method of calculation of hybrid (metal-polymer) sliding bearings according to the load capacity and durability of the bushing made of polyamide filled with glass or carbon dispersed fibers is presented. The initial contact pressures we…
View article: Study on the Self-Organization of an Fe-Mn-C-B Coating during Friction with Surface-Active Lubricant
Study on the Self-Organization of an Fe-Mn-C-B Coating during Friction with Surface-Active Lubricant Open
This paper investigates the friction process between an Fe-based coating and C45 steel with surface-active lubrication, as well as examines the coating surface before and after tribological testing. As a result, it is possible to determine…
View article: Analysis of Linkage Mechanisms with Internal Driving Link
Analysis of Linkage Mechanisms with Internal Driving Link Open
The linkage mechanisms with internal driving link that are used in many different machines are considered in the paper. The mechanism contains hydraulic cylinder that is hinged to the rack, a rocker arm that is pivotally attached to the dr…
View article: Analysis and Comparative Assessment of Basic Tribological Properties of Selected Polymer Composites
Analysis and Comparative Assessment of Basic Tribological Properties of Selected Polymer Composites Open
Phenomena occurring in the contact area between two mating bodies are characterised by high complexity and variability. Comparisons are usually made between parameters such as the coefficient of friction, friction force, wear and temperatu…
View article: Fretting-Wear Mechanism of Textured Surfaces
Fretting-Wear Mechanism of Textured Surfaces Open
The wear mechanism of textured dimpled in conditions of lubricated fretting-wear is established, which, in contrast to others, takes into account possibility of removing deterioration products out of tribo-contact areas into dimples, preve…
View article: Features of Formation Stress State of Amorphized Detonation Coatings of the Zr-Al-B Systems
Features of Formation Stress State of Amorphized Detonation Coatings of the Zr-Al-B Systems Open
The results of experimental studies of the dependence of the thickness of amorphous-crystalline Zr-Al-B coatings on the value and level of distribution of residual stresses of type 1 are presented. Was demonstrated that residual compressiv…
View article: GRADIENT COMPOSITE COATINGS FOR WORKING SURFACES OF BRAKING DEVICES
GRADIENT COMPOSITE COATINGS FOR WORKING SURFACES OF BRAKING DEVICES Open
In this paper a study to develop a composite wear-resistant coatings for application to the working surface of linings of brake devices, which is based on a rule of a positive gradient of mechanical properties was carried out. These device…
View article: Functional Plasma-Deposited Coatings
Functional Plasma-Deposited Coatings Open
The paper focuses on the problem of low adhesion of plasma sprayed coatings to the substrate. The subsequent laser treatment modes and their influence on the coating-substrate interface were studied. This allows to decrease the level of me…