Electrospark Graphite Alloying of Steel Surfaces: Technology, Properties, and Application

Tarelnyk, Viacheslav; Паустовский, А. В.; Tkachenko, Yu. G.; Марцинковский, В. С.; Belous, Andrey; Konoplyanchenko, E. V.; Гапонова, О. П.

doi:10.3103/s106837551802014x

Cited by 30 publications

(5 citation statements)

References 4 publications

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“…The first experiments were conducted on workpieces produced from easy-to-process conductive materials with a low melting point. Workpieces with dimensions of 200 × 20 × 16 mm of sorted and gauged corrosion-resistant, heat-resistant, and high-temperature steel of 12KH18N10T grade (analogue of AISI 321, specifications by interstate standard GOST 5949-75) [83, 84, 85, 86, 87, 88] and 200 × 16 × 16 mm of D16 aluminium alloy (AlCu4Mg1, analogue of AISI 2024) [89, 90, 91, 92, 93, 94] were used.…”

Section: Methodsmentioning

confidence: 99%

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Grigoriev

Kozochkin

Porvatov

et al. 2019

Heliyon

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The productivity of electrical discharge machining (EDM) is relatively low owing to the natural laws of electrical erosion. Precise EDM demands uninterrupted control of the discharge gap and adjustment of process parameters. It is particularly critical for processing large workpieces with complex linear surfaces and for materials with threshold conductivities such as the new advanced ceramic nanocomposites Al2O3+TiC and Al2O3+SiCw+TiC(30–40%). In these cases, adequate flushing of erosion products is hampered by the geometry of the working space or by the small value of the required discharge gap, which does not exceed 2.2–2.5 μm. The methods of adaptive control in modern computer numerical control systems of EDM equipment based on measuring the electrical parameters in the working zone have been shown to be ineffective in the cases described above. This study aims to investigate the natural phenomena of material sublimation under discharge pulses for conductive ceramics and nanocomposites. The measured conductivities of the samples are higher than the percolation threshold. However, the question of machinability remains open owing to detected processing interruptions and poor quality of machined surfaces. New knowledge on EDM of conductive ceramics and nanocomposites can improve the final quality of the machined surfaces and productivity of the method by the introduction of advanced monitoring and control methods based on acoustic emissions. The manuscript presents an up-to-date overview and current state of the research on the subject area. The obtained morphology of the samples and discussion of the findings complete the experimental part of the study. The scientific basis for a new type of adaptive control system is provided. This can improve the effectiveness of parameter control for machining conductive ceramics and nanocomposites and contribute to an increase in the EDM performance for the most critical cases.

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Section: Methodsmentioning

confidence: 99%

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Grigoriev

Kozochkin

Porvatov

et al. 2019

Heliyon

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“…-Creation of coatings with 3 and 4 times consecutive electrode passes, the first passes with high pulse energy and the last with low pulse energy and specially selected electrodes -for example graphite [9,10,14,36 ], or low melting materials [13,[23][24][25][33][34][35], as well as the AlSi alloys used in these studies, which "spill" onto the plated surface filling the pores and reducing the roughness. This method allows reducing the roughness of the coatings to Ra ≈ 2.5-3 µm;…”

Section: Some Guidelines For Reducing the Roughness Of Esd Coatingsmentioning

confidence: 99%

Study of the Influence of Coating Roughness on the Properties and Wear Resistance of Electrospark Deposited Ti6Al4V Titanium Alloy

Penyashki,

Kostadinov,

Kandeva

et al. 2024

Tribol. Ind.

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The present work is concerned with studying surface parameters of coatings deposited to titanium alloy Ti6Al4V by electrospark deposition (ESD) with hard alloy depositing electrodes based on WC, TiC and TiCN. The variation of roughness parameters, composition, structure and tribological characteristics of coatings as a function of ESD mode parameters was investigated. The influence of the mode parameters on the main coating roughness parameters (Ra, Rz, Rmax, Rpk, Rk, Rs, Rsk, Rku (ISO 21920-2:2021) was analysed, the values of which can be used to determine the load bearing capacity and wear resistance. The results of the tribological tests showed that within the test range, the roughness of the coatings has a controversial influence on their frictional wear performance. As the roughness parameters increase to Ra=3÷3.5 µm, the relative wear resistance of the coated surfaces also increases, reaching values up to 4÷5 µm for the electrodes used and no significant changes in the wear mechanism were observed. However, increasing coating roughness above Ra=3.5 to 5 µm results in a monotonic decrease in relative wear resistance to 2.5÷3 times. Possible ways to reduce the surface roughness and increase the wear resistance of coatings were presented.

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“…So, using a graphite electrode and saturating the surface of a part with carbon, it is possible to carry out the carburizing process, the ESA method with an aluminum electrode provides for the process of aluminizing, etc. [25][26][27][28].…”

Section: Formulation Of the Problem Analysis Of The Main Achievements...mentioning

confidence: 99%

Assessment of Hydroabrasive Wear Resistance of Construction Materials with Functional Coatings, which are Formed by Resource-Saving and Environmentally Friendly Technologies

Tarelnyk

Коноплянченко

Гапонова

et al. 2020

KEM

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The work presented in this paper is devoted to the formation of thick-layer wear-resistant coatings by technologies based on electrospark alloying, an example of essential components hardening for the heavy-duty processing equipment operating under hydroabrasive wear conditions. The aim of the paper is to improve the manufacturing and repairing technologies for the helical surfaces of the screws made of 65Г, 30X13 and 40X steels and corrosion-resistant stainless steel 12X18H10T. The above aim has been achieved owing to applying the new environmentally friendly technologies for the formation of the surface layers, and also due to the choice of the surface layers that are most resistant against hydroabrasive wear, which choice being provided for by conducting the comparative tests on the samples made of the above said steel grades and strengthened in various ways. The analysis results of the hydroabrasive wear resistance of the samples made of steel and provided with protective coatings is presented.

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Electrospark Graphite Alloying of Steel Surfaces: Technology, Properties, and Application

Cited by 30 publications

References 4 publications

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

Study of the Influence of Coating Roughness on the Properties and Wear Resistance of Electrospark Deposited Ti6Al4V Titanium Alloy

Assessment of Hydroabrasive Wear Resistance of Construction Materials with Functional Coatings, which are Formed by Resource-Saving and Environmentally Friendly Technologies

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