Investigation of the Properties of Non-Tungsten Electro-Spark Coatings on High Speed Steel

Penyashki, T.; Kostadinov, G.; Kandeva, M. K.

doi:10.15544/balttrib.2017.08

Cited by 4 publications

(10 citation statements)

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“…The study of the general laws and micromechanical properties of the formed layer and their influence on the mechanism and wear kinetics allows to determine ways for controlled management of the operational properties of the treated surfaces and to develop technological variants for ESD. This method is used for deposition of coatings on titanium and its alloys most often at a single pulse energy of 0.1-0.5 J [16][17][18][19][20][21][22][23][24][25][26], with a wide range of layering electrode materials -pure metals, alloys and carbide compositions.…”

Section: Introductionmentioning

confidence: 99%

Abrasive Wear Resistance of Electrospark Coatings on Titanium Alloys

Kandeva¹,

Kostadinov²,

Penyashki³

et al. 2022

Tribol. Ind.

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According to most researchers, improving the tribological characteristics of titanium alloys at this stage is most appropriate through surface modification tribotechnologies. In the present work, the qualitative characteristics of coatings of tungsten-free hard alloy materials materials based on TiC, TiN TiCN TiB2, applied on the most popular titanium alloy Ti6Al4V by electrospark deposition with low pulse energy are investigated. The influence of the electrode materials, the process parameters, the characteristics of the coatings and the roughness parameters on their wear and abrasion resistance has been studied. It was found that the use of coatings from the studied electrodes shows an increase in abrasion resistance by 1.5 -up to 3 times compared to that of the substrate and the electrode materials and process parameters were determined, in which maximum wear resistance was obtained.

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Section: Introductionmentioning

confidence: 99%

Abrasive Wear Resistance of Electrospark Coatings on Titanium Alloys

Kandeva¹,

Kostadinov²,

Penyashki³

et al. 2022

Tribol. Ind.

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“…Titanium carbide is recommended because of its wide range of homogeneity, high hardness, temperature resistance and wear resistance. [7,13,15,22,23,31,33,34,42,43].…”

Section: Considerations In Selecting the Composition Of The Coating Materialsmentioning

confidence: 99%

“…TiN has the lowest friction coefficient and the highest resistance to wear. Furthermore, it is chemically least active with respect to iron and copper and can be an excellent barrier against adhesion and diffusion wear and is the most common in practice material for applying wear-resistant coatings on metal cutting tools of high-speed steels [13][14][15][21][22][23][41][42][43].…”

Section: Considerations In Selecting the Composition Of The Coating Materialsmentioning

confidence: 99%

“…Considering that these additives increase the hardness but also the brittleness of the coating and the specificity of the ESD transfer, the optimal concentration of the bonding mass should be in the range of 12-25% for coatings of different uses, and for thick coatings -20-40%. [6,7,8,[13][14][15][16]22,23,33,43]. The composition and particle size is chosen depending on the type of the material to be laid, the desired coating properties and the type of the coating apparatus.…”

Section: Discusse and Findings In Relation To Coating Materials Structurementioning

confidence: 99%

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Considerations for the Selection of Materials for Electrical Spark and Gas Flame Spraying Deposition on Structural Steels

Penyashki¹,

Kandeva²,

Kostadinov³

et al. 2019

PES

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The aim of the present work is to identify and formulate the basic principles and approaches for the selection of materials for electrical spark and gas-flame stratification of structural steels. For this purpose, have been examined: -The characteristic features and physical foundations of the two methods, the changes in the composition and structure of the coating materials in the transfer process and in the formation of the coatings and the general similarities and differences.-The regularities of formation and qualitative characteristics and properties of the coatings obtained, depending on the process parameters of the coating mode and the layering material.-The interrelation between: the process parameters of the application system; the coating material; the quality characteristics, the composition, the structure of the coatings; the mechanical and the tribological properties of the coatings. The requirements for coatings have been formulated for various loads and wear cases and on this basis the requirements for the layering materials are determined by the two methods. Appropriate materials and compositions are specified for various cases of friction and wear. The main approaches to the selection of the layering materials are described.

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“…Electric spark deposition technology is considered as a promising technology in improving the surface wear resistance of agricultural machine in soil with tough components [11]. Penyashki et al [12] studied the wear resistance of TiC, TiN-based cemented carbide electrode composite coatings of high-speed steel by non-contact local electrical spark deposition (LESD) technology. Results suggested that coated HS6-5-2 Steel presented 2.5 times the wear resistance as compared with the bare steel.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Soil Wear Resistance of D517 Coating Deposited by Electric Spark Deposition

Wei

Wan

et al. 2021

Materials

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The abrasion failure is the key factor for prolonging the service life and energy saving of furrow openers. The hardness enhancement was reported to be an effective strategy to increase the wear resistance against the soil abrasion. D517 coatings were deposited on Q235 steel by electric spark to improve the wear-resistant property with an affordable cost for farmers. The wear behavior of the coatings was characterized in a pin on disk friction equipment and a homemade soil abrasion simulation system. The soil adhesion, which is highly related to energy consumption, was also evaluated. Results showed that D517 coatings revealed dendrite structure with some randomly distributed carbides. The electric current exerted a great influence on the microstructure, hardness, friction coefficient, and soil wear rate. The wear rate of samples deposited with 80 A and 90 A reduced to 79% and 84%, respectively, as compared with the normalized heat-treated 65 Mn steel after 6 h in soil. This work provides a promising solution to increase the wear resistance of furrow openers. It needs to be noted that the coating would increase the soil adhesion of the opener, which needs to be further explored to decrease the energy consumption.

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Investigation of the Properties of Non-Tungsten Electro-Spark Coatings on High Speed Steel

Cited by 4 publications

References 1 publication

Abrasive Wear Resistance of Electrospark Coatings on Titanium Alloys

Abrasive Wear Resistance of Electrospark Coatings on Titanium Alloys

Considerations for the Selection of Materials for Electrical Spark and Gas Flame Spraying Deposition on Structural Steels

Microstructure and Soil Wear Resistance of D517 Coating Deposited by Electric Spark Deposition

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