Wear resistance of hydrogenated high nitrogen steel at dry and solid state lubricants assistant friction

Abstract

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.

Influence of Hydrogen-Containing Fuels and Environmentally Friendly Lubricating Coolant on Nitrogen Steels’ Wear Resistance for Spark Ignition Engine Pistons and Rings Kit Gasket Set

“…In addition, the graphite veins in the ring structure serve as oil reservoirs and counteract the destruction of the oil film under adverse operating conditions. We also found that high-nitrogen steels can hold well on their surface layered coatings, not only of graphite origin, and reduce the intensity of wear [26,27].…”

“…We have established that high-nitrogen steels can hold a layer of adsorbed layered lubricants on their surfaces for several hours (in the absence of lubrication) [25,26]. This feature is associated with the characteristics of the surface layer formed in a number of technological operations.…”

“…In addition, concerning the composition of the raw materials for LCL, the parameters of the raw materials were evaluated; the methodologies were described in [26,27,46]. Physico-chemical properties were tested and prognostic sanitary-toxicological assessment of the studied substances was performed according to the recommendations [50][51][52].…”

Wear Resistance of Spark Ignition Engine Piston Rings in Hydrogen-Containing Environments

“…This process contributes to intensive wear [2][3][4][5][6][7][8][9][10]. Authors [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] have analyzed the features of hydrogen wear of construction machine parts.…”

“…The ways of surface hydrogenation are established, the mechanism of hydrogen wear of machine parts and equipment is discussed, and the methods of protection against tribohydrogen saturation are formulated [10]. On the other hand, the interaction of hydrogen with metals and non-metallic elements [19][20][21][22][23] and its influence on various properties of metals, alloys, hydrogen-induced specific defects, and hydrogen embrittlement, as well as the effect of hydrogen on the mechanical characteristics in the "hydrogen-metal" couple, are assessed [1,2,10].…”