Problem. Determination of the impact on the wear resistance of the tribosurface (IPP) of the TiN-Cr2N system by the method of solid matter condensation under ion bombardment conditions. Goal. The goal is studying of the effect on the wear resistance of the tribosurface of the TiN-Cr2N system by the method of solid substance condensation under ion bombardment conditions. Methodology. The choice of the composition for ion-plasma pavement for tribocouplers laboratory tests were carried out on the SMC-2 friction machine. The wear test samples were subjected to ion-plasma coatings such as МоN, ТіN and TiN-Cr2N. Results. As a result of laboratory tests it was found that ion-plasma coating of TiN-Cr2N improves the wear resistance of the tribocouplers by about 2.0 times. Furthermore, the wear of the samples with the ion plasma coating TiN and MoN at all loads is less than of the samples after quenching by high frequency but higher than when using the coating TiN-Cr2N. Originality. The coating of the TiN-Cr2N system increases the wear resistance of the tested samples (tribocompounds) due to the presence of titanium nitride and contributes to the increase in corrosion resistance due to the presence of chromium. Practical value. The obtained results of laboratory tests make it possible to predict an increase in the wear resistance of tribocombinations in real conditions of their operation (especially with limited lubrication or without it at all).

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It has been shown theoretically and confirmed experimentally that the dispersion of dirt particles found in engine oils and working fluids affects significantly their physical properties. In particular, it has been established that if dirt particles are artificially dispersed in a lubricant, its electrical conductivity increases. This, in turn, is expected to lead to a decrease in the share of electrostatic wear of the tribo units. Such particles are also able to increase the mechanical strength (surface tension) of lubricating films, that is, to make the boundary layers more durable, due to which we can expect a decrease in wear of tribo units. In this case, the thermal conductivity of oil lubricating films with highly dispersed dirt particles does not change.

The development of civil and industrial construction and the growing trend of construction of underground communications have led to an increase in the volume of work on the laying of gas and oil pipelines, water mains, sewerage systems, power cables and communication cables. Much of the excavation work in the construction of these communications is performed by trench excavators.