Influence of metallurgical texture on the abrasive wear of hot-rolled wear resistant carbon steels

Damião, Carlos Alberto; Alcarria, G.C.; Teles, Vinícius; Mello, José Daniel Biasoli de; Silva, W.M. da

doi:10.1016/j.wear.2019.01.046

Cited by 18 publications

(6 citation statements)

References 19 publications

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“…The technique is based on the alteration of the wheels -rails contact surface due to the periodic transition of the padded set from sliding friction to rolling friction. To implement this technique, a stationary skid length adjuster (anti-slide safety system) which is an ordered system of devices (working modules) located on the neck of the track rail on the side of the brake shoe in a predetermined order with a certain interval is developed [9][10][11]. According to the methodology, the entire slidepath of the wheelset (LТ) at each brake position is divided into intervals (Li), within which the formation of slides on the wheels is excluded:…”

Section: Operating Principle and Methodsmentioning

confidence: 99%

Skid adjuster for humps

Demyanov

Rybak

2019

E3S Web Conf.

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The paper based on the analysis of the working conditions of railway transport shows that, ceteris paribus, an increase in actual durability and mean time before failure of rolling stock units is obtained through maintenance of wheelsets, especially during logistic processes on nonmechanized humps. One of the main causes for the service life decrease of wheelsets is brake damage. To eliminate such brake damage on highways, on-board braking dis-tance regulators mounted on the locomotive are used. In the hump yards, using such systems is not possible, since under marshalling, cars are detached from the locomotive. In this regard, an industrial challenge turns up to design a similar in purpose braking distance regulator for humps through skidding. To solve this problem, we developed a method of controlling the speed of cars to be sorted, which complements the widely used technology of the shoe braking and avoids the formation of one-way sliders. The paper presents a skid adjuster, which excludes brake damage to the rolling stock wheels by the slides on the humps using the shoe braking techniques. The motion equation of the rolling stock equipped with a skid adjuster on the hump tracks is developed. In the result of this study, an equation of car motion in the system of “rolling stock Hughes regulator way” allowing to enter the working elements of Hughes controller to an existing and debugged algorithm of any slides with minimal change it.

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Section: Operating Principle and Methodsmentioning

confidence: 99%

Skid adjuster for humps

Demyanov

Rybak

2019

E3S Web Conf.

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“…The group, in addition to developing, designing and building various instruments applied to the study of tribology as already reported, also contributed effectively to the understanding of fundamental phenomena such as the effect of strain hardening on abrasion resistance [130], the role of wear debris on sliding wear of aluminium [131] and tool steels [132], the influence of metallurgical texture on the abrasive wear of wear-resistant carbon steel [133], the effects of surface finish on the life of cutting tools [134], the impact of the superposition of interactions on the transition of abrasive wear mechanisms [135], as well as their simulation by parallel scratches [136] and the potential of triboscopy to monitor friction and wear [137]. Also noteworthy is the improvement of various tribological techniques, such as new insights from force measurements applied to tribocorrosive tests [101], the application of non-linear signal analysis in the analysis of tribological tests [138], and a new methodology to determine resistance to the loss of the sharpness of knives and blades [139].…”

Section: Brazilian Tribology: Status Quomentioning

confidence: 99%

Brazilian Tribology: origin, status quo and future perspectives

de Mello,

Costa

2023

Surf. Topogr.: Metrol. Prop.

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This first regional issue published in STMP highlights the potential and importance of the research carried out in Latin America regarding surface engineering and tribology. In order to celebrate this important initiative, a complete historical account of Brazilian tribology is presented for the first time. It initiates with the first steps of Brazilian tribology in the 1980s, followed by the evolution and expansion of tribology research both in academic centres and industry. Focus is given to two outstanding achievements of Brazilian tribology: the fully flexible engines that run at any proportion of ethanol and gasoline and a fully innovative, completely oil-less family of hermetic compressors. The status-quo of the current research groups on tribology is described. Finally, the future trends envisaged by the Brazilian tribology community are presented.

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“…Friction and wear have been an urgent challenge for the industry, the main cause of which is the failure of core components due to material depletion, which seriously affects their service life and economic costs [5][6][7]. At present, scientists have made great progress in anti-friction and wear reducing materials, surface coatings, lubricants and additives [8][9][10][11][12][13][14], relatively speaking, the textured surface technology is gradually becoming the focus of attention due to its excellent tribological properties.…”

Section: Introductionmentioning

confidence: 99%

Study on the surface microtexture microscopic friction and wear characteristics of 304 stainless steel

Sun,

Yuan,

Tang

et al. 2023

Modelling Simul. Mater. Sci. Eng.

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In order to reveal the friction behaviour and wear mechanism of nanoscale textures on the friction pair of 304 stainless steel, molecular dynamics simulations were firstly used to investigate the effects of smooth and textured surfaces on the tribological properties of the stainless steel substrate, and then focus on the effects of sliding velocity and depth on the surface morphology, mechanical force, friction coefficient, anisotropy, stress, temperature and dislocations of the textured substrate. The results show that the temperature, friction, stress, and dislocation line length of the textured surface are relatively smaller than those of the non-textured surface, and the textured surface has a smaller and more stable friction factor, which ultimately leads to a reduction of the friction factor by about 0.090. When the sliding distance is 120 Å, the number of defective atoms in the textured substrate is reduced by 12.9%, and its anisotropy is more stable. At the same indentation depth, the average friction coefficient, temperature and anisotropy increase significantly with increasing sliding velocity. The average friction coefficient is maximum when the sliding velocity is increased to 400 m s−1, with a value of about 0.833. The sliding friction, friction coefficient, dislocation line length, number of defect atoms, number of stacked atoms, stress, temperature and anisotropy factor increase with increasing depth of abrasive indentation. The average friction coefficient is minimum at a sliding depth of 4 Å, with a value of about 0.556, and the number of defective atoms is reduced by 83.2%. This indicates that textured surface treatment of 304 stainless steel and selection of appropriate sliding parameters can effectively reduce the wear during the friction process and improve the wear resistance of the substrate.

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Influence of metallurgical texture on the abrasive wear of hot-rolled wear resistant carbon steels

Cited by 18 publications

References 19 publications

Skid adjuster for humps

Skid adjuster for humps

Brazilian Tribology: origin, status quo and future perspectives

Study on the surface microtexture microscopic friction and wear characteristics of 304 stainless steel

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