COMBINED TECHNOLOGY OF ELECTRO-SPARK ALLOYING AND THERMAL DIFFUSION BORIDING OF STEEL

Vladimir Dashkevich, Yulia Usherenko, Victor Ivashko, Igor Matvienko

Abstract


The process of thermal diffusion boriding is well known and used throughout the world. It has a number of unique properties, such as high hardness and wear resistance under abrasive wear conditions. Continuous boride layers have increased brittleness, which is related with the elastic properties of borides. In this work, we studied the features of the formation of surface layers onlow-carbon steels after electro-spark alloying, and not by continuous processing of the entire surface of the steel, but only sections and subsequent thermal diffusion boriding from powder medium. Such complex technology enables to form discrete regular and irregular layers, which have a number of advantages, in particular, reduced brittleness. The structure and phase composition of the combined coating growth kinetics of the diffusion layer during the thermal diffusion boriding, are investigated. The creation of the considered composite layers with FeB and Fe2B phases with reduced brittleness will significantly expand their area of application, for example, for working conditions with moderate impact loads.

Keywords


electro-spark; boriding; steel

Full Text:

PDF

References


LG. Voroshnin, L.S. Lyakhovich, Boronizing of Steel, Metallurgy, Moscow, 1978 (in Russian).

M. Kulka, Current trends in boriding: Techniques: Springer Nature, Switzerland, 2019.

Krukovich M.G., Prusakov B.A, Sizov I.G. Plasticity of Boronized Layers: Springer International Publishing AG, Switzerland, 2016.

M.A. Béjar, W. Schnake, W. Saavedra J.P. Vildósola, Surface hardening of metallic alloys by electrospark deposition followed by plasma nitriding, Journal of Materials Processing Technology 176 (1-3), pp. 210-213. June 2006.

O.A. Bannyh, M.E. Drica, Phase diagrams of binary and multicomponent iron-based systems: A Handbook, Moskow: Metallurgy, 1986 (in Russian).

A.E. Gitlevich, V.V. Mikhailov, N.Ya. Parkansky, V.M. Revutskiy, Electrospark alloying of metal surfaces, Chisinau: Shtiintsi Publishing House, 1985 (in Russian).

C. H. Xu, Wei Gao,Y.L. Yang, Superplastic boronizing of a low alloy steel – microstructural aspects, Journal of Materials Processing Technology. Vol. 108 (3), pp. 349-355, Jan. 2001.

V. F. Protasevich, V. V. Melnichenko, Some features of microhardness and micro-brittleness of boride layers, Journal of Foundry Production and Metallurgy. Vol. 4 (36), pp. 145-147, 2005 (in Russian).




DOI: http://dx.doi.org/10.17770/etr2019vol3.4149

Refbacks

  • There are currently no refbacks.