Structure and Properties of Complex Boron Coatings on Carbon Steel

Issues » Volume 37, Issue 6

S. M. Chernega$^{1}$, I. A. Polyakov$^{1}$, I. Yu. Medova$^{1}$, M. O. Krasovskyi$^{2}$

$^{1}$National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 37 Peremohy Ave., UA-03056 Kyiv, Ukraine
$^{2}$I. M. Frantsevich Institute for Problems in Materials Science, NAS of Ukraine, 3 Academician Krzhyzhanovsky Str., UA-03142 Kyiv, Ukraine

Received: 04.12.2014; final version - 17.04.2015. Download: PDF

The results of study of deposition of boron-silicide coatings obtained by powder method on carbon steel are presented. The phase and chemical compositions, thickness and microhardness of the coating on the steel are determined. The calculations of the thermodynamic possibility of chemical reactions and change in the thermodynamic potential of saturating environment are performed. As established, the boron coatings obtained after boriding with the addition of Si or Fe—Si consist of phases FeB, Fe$_{2}$B and additional phase of graphite. X-ray analysis reveals the silicon distribution by depth of boron phases with the change of solubility from 0.01 to 0.5 wt.% with a maximum concentration of silicon in Fe$_{2}$B phase of central zone of boron coating. The boron-silicide coatings possess 1.5 times higher wear resistance compared with the original boron coatings.

Key words: microhardness, wear resistance, crack resistance, diffusion, boriding, boron-siliciding.

URL: http://mfint.imp.kiev.ua/en/abstract/v37/i06/0751.html

DOI: https://doi.org/10.15407/mfint.37.06.0751

PACS: 06.60.Vz, 62.20.Qp, 81.05.Je, 81.15.-z, 81.40.Pq, 81.65.Lp, 81.70.Jb

Citation: S. M. Chernega, I. A. Polyakov, I. Yu. Medova, and M. O. Krasovskyi, Structure and Properties of Complex Boron Coatings on Carbon Steel, Metallofiz. Noveishie Tekhnol., 37, No. 6: 751—761 (2015) (in Ukrainian)

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