Agricultural Engineering, Volume 49 (2017)


Todor Penyashki, Georgi Kostadinov, Mara Kandeva
Agricultural Academy – Sofia; Technical University – Sofia


Abstract: Non-contact local electrospark deposition (LESD) are used in this work to study the wear and increase the wear resistance of products from high speed steel HS6-5-2 with coatings from TiC and TiN-based hard alloys electrodes at  friction and cutting.  The complex influence of the operating electric parameters for the LESD and the electrode materials on the contact processes and the wear of the layered samples and tools whit resulting coatings during cutting and abrasion friction were investigated. There has been an increase in wear resistance of the deposited samples and tools and the conditions under which the lowest wear can be obtained have been determined. Depending on the used processes parameters, the wear of the layered tools and specimens is 1.3 to 2.4 times lower than that of the uncoated. The values of the process parameters of the LESD modes in which the maximum durability of the coated products is reached are determined.

Keyword(s): elecro –spark deposition, coatings, non-tungsten electrode materials, wear resistance


B.Antonov, Device for local electric-spark layering of metals and alloys by means of rotating electrode, US Patent № 3832514 (Aug. 27, 1974).

B. Antonov, St. Panayotov,O. Lyutakov, Apparatus for the spark deposition of metals, US Patent 4226697 Okt.1980.

T.G. Penyashki, G.D. Kostadinov, Enhancing durability and resources agricultural machinery using electrospark hardening, Agricultural Engineering (Bulgaria), №4-6, 2013, pp.48-55 (bulg.)

V.N. Gadalov, D.N.Romanenko, I.M. Goryakin, YU.P.Kamyshnikov, V.I. Shkodkin, Lokal'noye izbiratel'noye naneseniye elektrofizicheskiye pokrytiy na metalloobrabotyvayushchiy instrument, Uprochnyayushchiye tekhnologii i pokrytiya, 2008, № 4, pp. 33-36.

A.E. Gitlevich, V.V. Mikhaĭlov and all.: Élektroiskrovoe legirovanie metallicheskikh poverkhnosteĭ , Kishinev, Shtinitsa, 1985, 198,198p. (ru)

V. N.Gadalov, R. E. Abashkin, Yu. V. Boldyrev, E. F. Balabaeva, A. I. Lytkin, Cutting-tool wear and hardening of high-speed steel by local electrospark coating application Russian Engineering Research, April 2009, Volume 29, Issue 4, pp. 419–422. DOI: 10.3103/S1068798X09040200

E.A. Brown, , G. L. Sheldon, A. E. Bayoumi. A parametric study of improving tool life by electrospark deposition, Wear, Volume 138, Issues 1–2, June 1990, Pages 137-151.

T.Penyashki, G. Kostadinov, I. Mortev, E. Dimitrova, Microstructures and wear properties of WC, TiN, and TiC based cermet coatings deposited on 210Cr12 and 45 carbon steel by contactles electrospark process. Tribological Journal BULTRIB, Vol. 6, 2016, pp154-167.

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Agricultural Engineering ISSN 1392-1134 / eISSN 2345-0371

This journal is published under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License. Responsible editor: Dr A. Žunda.