Control of Metal Surface Mechanical and Tribological Characteristics Using Cost Effective Electro-Spark Deposition

Rukanskis, Mindaugas

doi:10.3103/s1068375519050107

Cited by 10 publications

(5 citation statements)

References 45 publications

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“…Here, Ni and Co elements are used as binding materials. The use of bonding elements makes it difficult for cracks to form and spread within the coating and increases the hardness values of the coatings (Burkov and Pyachin, 2014;Ebrahimnia et al, 2014;Rukanskis, 2019;Kayalı and Talas, 2021).…”

Section: Hardness Testmentioning

confidence: 99%

“…With this coating method, a coating layer consisting of most metal, alloy or composition can be deposited on the surface of the substrate without extensive preparation (Ruijun et al, 2005;Aghajani et al, 2020;Kayalı and Talas, 2021). Since the devices required for ESD technique are easy to carry and operate, they can be used in various indus-trial applications (Ebrahimnia et al, 2014;Rukanskis, 2019). While the presence of Tungsten and Cobalt in the coating increases the wear resistance, Nickel and Molybten negatively affect the tribological properties of the coatings.…”

Section: Introductionmentioning

confidence: 99%

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Wear performance of GGG60 ductile iron rollers coated with WC-Co by electro spark deposition

Buğday,

Karalı,

Talaş

2023

Rev. metal.

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Nodular cast irons are used in many industrial applications such as machine frames and body, rollers and engine blocks due to their higher strengths and ductility with good machinability comparable to grey cast irons. In this study, the outer surface of nodular cast irons (GGG-60) was coated with WC/Co using electro spark deposition (ESD). The aim of the study is to improve both the surface quality and wear behaviour with the coatings formed on the surface of the plastic deformation rollers, whose wear resistance decreases over the time due to high stress working conditions. Heat treatment at 950 ºC for 2 h was applied to the GGG60 specimen rollers and half of the rollers were uncoated and the other half was coated with WC-Co electrodes. The wear behaviour of the heat treated and coated surfaces was measured by ball-on-disc wear method using Al2O3 ball bearing with a diameter of 6 mm for a sliding distance of 250 m at a sliding rate of 6.5 m·s-1 under a dry condition, and using a load of 40 N. WC/Co coatings were successfully applied to rollers. In the SEM/EDS images, the presence of W, Fe, C, Co and Al elements in the coated part of the rollers and Fe, C and Al elements in the uncoated region were detected. It was concluded that Coating and heat treatment increased the wear resistance by nearly 5 times and decreased the friction coefficient by 2.13 times.

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Section: Hardness Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wear performance of GGG60 ductile iron rollers coated with WC-Co by electro spark deposition

Buğday,

Karalı,

Talaş

2023

Rev. metal.

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“…The electrospark deposition (ESD) process was developed by Lazarenko and has been known about since 1964 [4], but it has been recognized worldwide as a 21st century technology; many researchers have pointed out that this low-heat-input process has great potential for coating applications and the restoration of damaged high-value parts (see, e.g., [5]). The main advantage of ESD is a low-heat-input pulsed micro-bonding process that uses short-duration, high-current electrical pulses to weld a consumable electrode Lubricants 2023, 11, 205 2 of 16 material to a metallic substrate, i.e., allows a good adhesion of coating to the substrate [6][7][8]. During the ESD process, the electric current short pulses generated between the tip of the electrode tool (anode) and the substrate (cathode) direct the molten droplets from the anode towards the cathode, where they produce strongly adhered deposits [9,10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Wear and Corrosion of Novel Electrospark and Electrospark–Electrochemical Hybrid Coatings Based on Carbon Steels

et al. 2023

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The electrospark deposition (ESD) technique is a low-heat-input process that has great potential for coating applications and the restoration of damaged high-value parts. Carbon steels are commonly used as a substrate material for ESD coatings. However, we demonstrated that carbon steels could be used successfully as the electrode tool for the ESD process. Furthermore, ESD coatings commonly have a high as–deposited roughness. In view of this, in order to reduce the roughness of the ESD coatings, electrodeposition as a tool to alter surface morphology was investigated. Hence, the micro-leveling power of several electrolytes for Ni, Fe-W, Fe, and Cr electrodeposition were evaluated. The maximum leveling effect was detected for Ni electroplated from the Watts electrolyte. Thus, the novel hybrid coatings based on an ESD layer and a subsequent layer of electrodeposited Ni were obtained. ESD layers were obtained by using the following electrode tools as anodes: several types of carbon steels (St20, St30, and St45), alloys T15K6 (WC + TiC + Co), CuNiZn; and NiCr. The morphology and structure of the obtained hybrid coatings with an electrodeposited Ni top-layer was analyzed and compared to ESD coatings from the point of view of their wear and corrosion behavior. The wear rate of the novel ESD coatings based on carbon steels was comparable with coatings obtained using the NiCr electrode tool. Moreover, for all the studied cases, the corrosion resistance of the hybrid coatings was higher than for their ESD counterparts and close to electrolytic chromium.

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“…прошлого века, а также более поздние [1,2]. Использование электроискровой модификации поверхностей, первоначально сталей, а впоследствии широкого круга материалов, обеспечивало эффективное и экономически обоснованное решение целого ряда задач технологии: упрочнение поверхности и повышение ее износостойкости [1][2][3], увеличение коррозионной стойкости [4,5], а в настоящее время и получение биологически совместимых поверхностей [6]. Как показано в ряде работ, выполненных в последнее время, в процессе ЭИЛ происходит наноструктурирование поверхности [7][8][9][10][11][12][13][14][15][16][17][18], что достигается либо естественным путем [7-9, 11, 16], либо введением в обрабатывающий электрод (ОЭ) ультрадисперсных материалов [10,12,17,18].…”

Section: Introductionunclassified

Composition, Structure, and Wear Resistance of Surface Nanostructures Obtained by Electric Spark Alloying of 65G Steel

Yurchenko,

Giletchi,

Vаtаvu

et al. 2023

EOM

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By a combination of the X-ray phase and fluorescence analyses, it was shown that a hardened layer formed during electric spark alloying of 65G steel using a processing electrode made of T15K6 hard alloy is a nanocrystalline material. The ratio of the crystalline and the amorphous phases in it was achieved by changing the discharge energy. Since an increase in the discharge energy leads to an increase in the surface roughness and its amorphization, there is an optimal value of the discharge energy at which the maximum wear resistance of the resulting nanocomposites is achieved. At E = 0.2 J, the wear resistance of the hardened layer is 7–10 times higher than that of an untreated surface.

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Control of Metal Surface Mechanical and Tribological Characteristics Using Cost Effective Electro-Spark Deposition

Cited by 10 publications

References 45 publications

Wear performance of GGG60 ductile iron rollers coated with WC-Co by electro spark deposition

Wear performance of GGG60 ductile iron rollers coated with WC-Co by electro spark deposition

Synthesis, Wear and Corrosion of Novel Electrospark and Electrospark–Electrochemical Hybrid Coatings Based on Carbon Steels

Composition, Structure, and Wear Resistance of Surface Nanostructures Obtained by Electric Spark Alloying of 65G Steel

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