Surface Wear Resistance Of Steel Research Articles

Increasing the service life of lubricants for the lubrication of agricultural machinery and road machinery

The article presents the results of the research on the adsorption activity of activated and organomodified aluminosilicate particles used as nanosized organomineral additives in lubricants technology. The technologies of oil adsorptive purification in presence of modified aluminosilicate particles are examined. The efficiency of bentonite activation with sodium chloride solution, acid activation of powdered bentonite, production of organomodified bentonite for base oil additives, aimed at increasing the wear resistance of steel surfaces, are analyzed. The efficiency of such materials usability for extending the lubricants life cycle has been shown. Tribological tests have confirmed the prospects of additives based on modified particles of aluminosilicates to increase the service life of friction units.

Research of Electrolyte Plasma Treatment Impact on Wear Resistance and Roughness of 18HN3MA-SH Steel

This work provides the results of research of the wear resistance of the surface of samples of low carbon structural of 18HN3MA-SH steel, subjected to electrolytic-plasma treatment by nitriding and carbonitriding. The effect of the structure on the surface wear resistance of steel is shown. Changes in abrasive wear and dry friction characteristics were studied depending on temperature and processing time. The results of studies of tribological tests show that after electrolytic-plasma nitriding, the wear resistance of steel 18HN3MA-SH increases by 1.5–2 times compared with the initial state. The observed effects can be explained by the flowing surface modification - the formation of a modified surface layer with the formation of hardening phases. The nature of changes in the surface roughness Ra of steel samples after cementation, carbonitriding and nitriding was studied.

Estimation of Wear Resistance of Plasma-Carburized Steel Surface in Conditions of Abrasive Wear

The work presents investigation results of wear resistance of steel surfaces at abrasive wear after plasma carburization for different types of surface layer structures. The optimal surface microstructure of the parts that is able to resist the effect of solid abrasive particles during operation is determined.

Possibilities of increasing wear resistance of steel surface by plasma electrolytic treatment

The paper considers the effect of the anode plasma electrolytic treatment (PET) on tribological properties of steels after their boriding (PEB), nitriding (PEN), and nitrocarburising (PEN/C). Electrolyte compositions and processing temperatures improved wear resistance of samples under dry friction condition using a ball-on-disk test with an Al2O3 ball as counter-body are determined. The anode PEB of medium carbon steel in solution of boric acid and ammonium chloride (850°C, 5min) followed by quenching in electrolyte enables to decrease friction coefficient, surface roughness 3 by times, and volume loss by 3.7 times. This treatment results in the change of wear mechanism from abrasive-adhesive wear to polishing mode. The PEN of medium carbon steel in a solution containing ammonia and ammonium chloride (650°C, 5min) followed by quenching in electrolyte leads to decrease in friction coefficient from 0.65 to 0.45, surface roughness by a factor of 1.74, and volume loss by 4.6 times. PEN/C of low-carbon steel in electrolyte containing glycerol, ammonium chloride and ammonium nitride at 950°C also promotes surface roughness and wear rate reduction of by 9.5 times.

Investigations of abrasive wear of steel surfaces strengthened by vibro-arc carbonization/layering

Friction and wear losses can be reduced by arc welding, tempering and other methods. One of these technologies is vibro-arc surface processing. By using this technology surface can be carbonized through the formation of extra layers with supplementary materials. The present work is an investigation of an opportunity to increase abrasive wear resistance of steel surfaces by carbonizing them by vibro-arc (80 and 120 A current) layering with a graphite electrode and by dip-transfer surfacing welded through layers that create paste-like coatings that consist of materials increasing resistance to wear. The investigations have been performed according to the standards of ASTM G65-94—Dry Sand Rubber Wheel Abrasion Test, and ASTM G132—Standard Test Method for Pin Abrasion Testing. Studies have shown that through surface carbonization layers are produced with a higher wear resistance than surfaces formed with the wear resistant powder PG-10N-01. When using carbonization, the wear resistance of steel surfaces increases by forming austenite synthetic (Fe0.94C0.06), cementite (Fe3C), iron oxide (Fe3.71O4) structures. Even with the wear resistance increased up to 39–41%, the carbonization creates just thin layers of 0.1–0.15 mm. Surface welding with current pulses by using additional materials generates high temperature gradients. This deteriorates coating quality resulting in uneven thickness, formed cracks, voids. The formation of austenite synthetic (Fe0.94C0.06), cementite (Fe3C), chromium nickel (Cr2Ni3), chromium iron carbide (Cr21.34Fe1.66C6), carbon iron (C0.09Fe1.91) structures in a layer increases hardness (average 6145–6310MPa). Although the strengthened layer is much harder than steel Hardox 400, under abrasive wear conditions it has only 20–23% less wear resistance than Hardox 400. Due to surface defects, significant increases in hardness have almost no influence on the wear resistance. Surface quality is increased by welding at a lower current. Because just a thin layer is formed, the carbonization process is not an efficient technology to increase the abrasive wear resistance.

Effect of simultaneous surface modification process on wear resistance of martensitic stainless steel

In order to improve the wear resistance of martensitic stainless steel, a surface treatment system was developed that combines high-frequency induction heating (IH) with fine particle peening (FPP). In this system, a compressed air spray from the FPP nozzle rapidly cools the specimen surface, which is heated by the IH system. The specimen surface can be simultaneously modified by work hardening and quenching. Vickers hardness and retained austenite measurements were conducted to characterize the surface-modified layer generated by the developed process. Surface microstructures were also observed by scanning electron microscopy (SEM) and optical microscopy. The process created a surface with a high hardness and an extremely fine-grained microstructure. The fine-grained microstructure was generated by dynamic recrystallization. The process reduced the amount of retained austenite in the surface layer because it increased the precipitated chromium carbide content. Reciprocating sliding wear tests were conducted to evaluate the wear resistance of the surface. The specimen modified by the developed process exhibited higher wear resistance than specimens that had only been quenched. This implies that the developed simultaneous process can significantly improve the wear resistance of steel surfaces.

Wear resistance of steel surfaces : V. V. Chernyshev. Henry Brutcher Translation No. 3450, 9 pp. (abridged from vestnik mashinostroeniya, v. 32, no. 9, 1952, p. 54–57.) Henry Brutcher, Altadena, Calif.

Wear resistance of steel surfaces : V. V. Chernyshev. Henry Brutcher Translation No. 3450, 9 pp. (abridged from vestnik mashinostroeniya, v. 32, no. 9, 1952, p. 54–57.) Henry Brutcher, Altadena, Calif.