Purpose: This paper is devoted the investigation hydrogen influence on of wear resistance
of high nitrogen steel (HNS) at dry and solid state lubricants assistant friction. It has been
established that after hydrogenation at 250 N loading the wear rate increased by 2.9 ...
4.1 times. Microhardness of hydrogenated layer was 7.6 ... 8.2 GPa, that is increased after
hydrogenation in two times. After adding the (GaSe)xIn1-x compounds to the tribo conjugates
by X-ray diffraction analysis it has been established the appearance of new phases which
formed during the friction process and detected on the friction surface.
Design/methodology/approach: This work presents research results concerning the
comparative tests of high nitrogen steels in the circumstances of dry rolling friction. It was
conducted the experiments to determine the tribological properties of high-nitrogen steels
under rolling friction. The test pieces were manufactured in the form of rollers, and rotated
with a linear velocity 2.27 m/s (upper roller), 3.08 m/s (bottom roller). Upper roller is made
from HNS was subjected for hydrogenation. Analysis of friction surfaces indicates the
complex mechanism of fracture surfaces. The results of the local X-ray analysis and X-ray
diffraction analysis has been established the appearance of new phases and elements on
the friction surface.
Findings: It has been found that the level of wear resistance of the investigated materials
under hydrogenation. Compounds realize chemisorption, tribochemical mechanisms of the
formation of thin protective (anti-wear, antifriction) layers on metal surfaces.
Research limitations/implications: An essential problem is the verification of the
results obtained using the standard mechanical tests, computer-based image analysis and
other methods.
Practical implications: The observed phenomena can be regarded as the basic
explanation of reduces the plasticity characteristics after hydrogenation. Applying the
(GaSe)xIn1-x compounds as a lubricant will allow the formation of films on friction surfaces
that can minimize surface wear, which will contribute to the transition to a wear-free friction
mode. The protective film is a barrier to high shear and normal loads, preserving the base
metal of the part and providing reduced wear and friction.
Originality/value: The value of this work is that conducted experiments permit to determine
the tribological properties of high nitrogen steels under rolling friction after hydrogenation.
After adding (GaSe)xIn1-x compounds to the tribo conjugates after due to X-ray diffraction
analysis it has been established the appearance of new phases which formed during the
friction process and detected on the friction surface.
Science intensive grinding technology ensuring life increase in machinery friction surfaces