Tribological Properties of Composite Coating Ni–Cr–B–Si–Boron-Containing Dispersed Phases Obtained by Arc Surfacing, at Abrasive Action and Sliding Friction

S. O. Luzan$^{1}$, V. A. Bantkovskiy$^{2}$, A. S. Luzan$^{2}$

$^{1}$National Technical University ‘Kharkiv Polytechnic Institute’, 2 Kyrpychova Str., UA-61002 Kharkiv, Ukraine
$^{2}$Kharkiv Petro Vasylenko National Technical University of Agriculture, 44 Alchevskykh Str., UA-61002 Kharkiv, Ukraine

Received: 10.08.2021; final version - 19.12.2021. Download: PDF

A comparative analysis of the structural-phase state, microhardness, wear resistance and wear mechanisms is carried out during tests on fixed abrasive and non-rigid fixed abrasive particles, as well as in sliding friction conditions, arc-deposited coatings with a composite material (CM) based on the powder material of the Ni–Cr–B–Si system, modified with a material containing titanium and chromium borides and obtained using the self-propagating high temperature synthesis. It is found that under wear conditions for fixed abrasive particles, the wear resistance of CM (10% modifying composite material (MCM) + 90% ПГ-10Н-01) is 1.5 times higher, and CM (20% microns + 80% ПГ-10Н-01) is 1.7 times higher than that of the ПГ-10Н-01 alloy. This is due to the introduction of MCM, which contributes to the formation of new crystallization centres during surfacing and as a result leads to grinding of the structure. The ПГ-10Н-01 nickel-based plastic matrix redistributes stresses, providing conditions in which solid components occupy a favourable position. This eliminates the local increase in contact pressure and reduces the probability of separation of solid wear-resistant particles. It is found that under friction under the influence of non-rigid abrasive particles, the increased wear resistance (1.2 times at a content of 10% MCM and 1.4 times at 20% MCM more compared to the ПГ-10Н-01 alloy) is due to the higher ability of CM to resist micro-cutting processes due to the formation of a structure based on a nickel matrix, which contains evenly distributed solid inclusions in the form of titanium diboride (TiB$_2$), nickel borides (Ni$_3$B) and chromium (CrB), titanium (TiO) and iron (Fe$_3$O$_4$) oxides. Based on the obtained experimental results, it is concluded that the presence of titanium diboride (TiB$_2$), chromium borides (CrB) and nickel (Ni$_3$B), titanium oxides (TiO) and iron (Fe$_3$O$_4$) in the deposited coating leads to a decrease in the intensity of wear under various friction conditions.

Key words: composite material, boride, SHS-process, overlaying welding, wear resistance.

URL: https://mfint.imp.kiev.ua/en/abstract/v44/i04/0531.html

DOI: https://doi.org/10.15407/mfint.44.04.0531

PACS: 62.20.Qp, 68.35.Gy, 68.55.Jk, 81.20.-n, 81.40.Pq, 82.33.Vx

Citation: S. O. Luzan, V. A. Bantkovskiy, and A. S. Luzan, Tribological Properties of Composite Coating Ni–Cr–B–Si–Boron-Containing Dispersed Phases Obtained by Arc Surfacing, at Abrasive Action and Sliding Friction, Metallofiz. Noveishie Tekhnol., 44, No. 4: 531—546 (2022) (in Ukrainian)


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