The Formation of the Friction Surface of Machine Parts of Wear Resistant Gradient Structures by Means of Combined Electromechanical Processing

Gorlenko, Aleksandr; Шевцов, М. Ю.; Агеева, Е. В.

doi:10.21869/2223-1560-2018-22-5-24-35

Cited by 6 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…При ЭМО были использованы следующие режимы: сила тока 1,4 кА; напряжение 2,9 В; давление, создаваемое на поверхности детали 110 Н/мм 2 . Эффект упрочнения при ЭМО достигается благодаря тому, что реализуются высокие скорости нагрева и охлаждения, и достигается высокая степень измельченности аустенитного зерна, которая обусловливает мелкокристаллические структуры закалки поверхностного слоя, обладающего высокими физико-механическими и эксплуатационными свойствами [3,4]. Комплексные сравнительные испытания образцов в условиях граничной смазки проводились на автоматизированной установке, созданной на базе машины трения МИ-1М, нормализованным методом с использованием нагружающего устройства оригинальной конструкции [5].…”

Section: основное содержание и результаты работыunclassified

Development and exploitation of shape-generating molding tools made of polymer composite materials in the production of aircraft composite structures

Shevtsov,

Snezhina,

Kamchatny

2024

Science Intensive Technologies in Mechanical Engineering

View full text Add to dashboard Cite

Processing technology and technological equipment for the formation of a wear-resistant surface layer by implanting materials based on tungsten carbide (WC), are viewed. The effect of implanted WC powder on the formation of gradient wear-resistant structures in the friction surface of carbon steel formed during the implementation of combined electromechanical processing (WRCEMP) technology, has been studied. Resulting from heat and pressure impact in the zone of plastic deformation, intensive austenization of steel occurs with dissolution of WC powder and subsequent formation of highly dispersed composite structures caused by the decomposition of undercooled tangstem-supersaturated austenite. Combined comparative friction and wear tests were carried out for structural steel 45 with a graded structure of a hardened surface and rather expensive and technologically- difficult to obtain modern wear-resistant coatings and materials. The issue of WRCEMP technology practical application used for the «axis of satellite – satellite» friction pair is viewed. An assessment of the durability increase of the «axis of satellite – satellite» interface during the implementation of the considered processing methods and innovative technology was taken. Recommendations for the use of combined electromechanical processing technology at machine-building enterprises as a highly effective way to ensure and improve the performance of machine parts at the stage of their manufacture are given.

show abstract

Section: основное содержание и результаты работыunclassified

Development and exploitation of shape-generating molding tools made of polymer composite materials in the production of aircraft composite structures

Shevtsov,

Snezhina,

Kamchatny

2024

Science Intensive Technologies in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…The combined technology of friction-electric modification of the surface layers of parts of multipurpose tracked and wheeled vehicles with surface-active modifiers, described in [1,4,5], makes it possible to obtain surface layers with high wear resistance and hardness, while it has a low cost, labor intensity and energy intensity that cause its high efficiency. Thus, friction-electric modification is one of the technological ways to improve the operational properties of the surfaces of parts and the further development of classical electromechanical processing [3,6,7,8].…”

Section: Introductionmentioning

confidence: 99%

Friction-Electric Modification of the Surfaces of Machine Parts with Tungsten Carbides

Edigarov¹,

Akhtulov²,

Dadayan³

et al. 2022

KEM

View full text Add to dashboard Cite

show abstract

“…атематические модели тепловых процессов комбинированных методов электромеханической обработки (ЭМО) с точки зрения металловедения имеют наибольшее сходство с термомеханической обработкой металлов [1][2][3][4][5][6] и основываются на уравнении теплопроводности. При этом учитываются отличия теплофизических свойств (температуропроводности ω, теплоемкости k, теплопроводности λ и теплоотдачи α), которые ограничиваются начальными и граничными условиями, технологическими и другими особенностями исследуемых методов обработки.…”

Section: Introductionunclassified

Modeling of Thermal Processes in a Technological System during Electromechanical Processing

Edigarov¹,

Alimbaeva²

2022

Vestnik IzhGTU imeni M.T. Kalashnikova

View full text Add to dashboard Cite

The article presents mathematical models of thermal processes of combined methods of electromechanical processing, which are based on the heat conduction equations, which take into account thermophysical properties (thermal diffusivity, heat capacity, thermal conductivity and heat transfer), initial and boundary conditions, technological and other features of the studied processing methods. In view of the fact that electromechanical processing (EMT) is characterized by a process with a volumetric heat release zone, with sufficiently small dimensions and high intensity, it is assumed that the determination of temperature fields can be carried out using the superposition principle. In this case, the main factors affecting the amount of heat propagating into the contacting bodies are the intensity of heat removal, the thermophysical properties of the contacting bodies, and the speed of their relative movement. Dependences are proposed that allow one to describe the temperature fields in the volumes of parts subjected to thermal deformation during electromechanical processing, which have significant geometric parameters that ensure sufficient heat removal from the treated surfaces into the part. It has been established that in the case of processing parts of small dimensions, with insignificant heat removal, it becomes necessary to take into account the accumulation of heat, which will lead to a general increase in temperature in the technological system during processing, and a decrease in the efficiency of the hardening process. The derived mathematical dependencies in the form of heat conduction equations with the established restrictions make it possible to determine the parameters of thermal fields during electromechanical processing in the system “working tool” - “local microvolume of the surface layer”, while these presented mathematical relationships are presented in a linear formulation with thermophysical coefficients. It has been theoretically established and experimentally confirmed that in the process of processing the main factors affecting the amount of heat propagating into the contacting bodies are the intensity of heat removal, the thermophysical properties of the contacting bodies, and the speed of their relative movement. The performed experimental studies have confirmed the adequacy of the mathematical dependencies used to calculate the temperatures in the local microvolumes of the treated surface layer.

show abstract

The Formation of the Friction Surface of Machine Parts of Wear Resistant Gradient Structures by Means of Combined Electromechanical Processing

Cited by 6 publications

References 2 publications

Development and exploitation of shape-generating molding tools made of polymer composite materials in the production of aircraft composite structures

Development and exploitation of shape-generating molding tools made of polymer composite materials in the production of aircraft composite structures

Friction-Electric Modification of the Surfaces of Machine Parts with Tungsten Carbides

Modeling of Thermal Processes in a Technological System during Electromechanical Processing

Contact Info

Product

Resources

About