Influence of environmental conditions and oxidation on the coefficient of friction using microalloyed rail steels

Sie sind hier: Homepage > Suche

Influence of environmental conditions and oxidation on the coefficient of friction using microalloyed rail steels

Viesca, JL / González-Cachón, S / García, A / González, R / Bernardo-Sánchez, A / Hernández Battez, A

In railway systems, certain atmospheric conditions – mainly related to temperature and relative humidity – lead to the creation of iron oxides which can affect the coefficient of friction between the wheel and the rail. This can result in increased wear of the rail, reducing its service life and thus increasing replacement costs. Pin-on-disc tests were conducted in a climate chamber to study the influence of environmental conditions and iron oxides on the coefficient of friction. The iron oxides generated on the surface of specimens extracted from microalloyed rail steel during wear tests were analysed using X-ray diffraction. The results show that hematite (α-Fe₂O₃) is the predominant iron oxide among all the oxides generated on the worn surfaces. It was further noted that the oxide layer resulting from the rise in both temperature and relative humidity does not significantly affect the average coefficient of friction for each steel samples tested. High relative humidity combined with high temperature leads to the formation of α-Fe₂O₃, which tends to increase the coefficient of friction. However, a boundary lubrication effect is observed at higher relative humidity due to a condensed water film, which reduces the coefficient of friction and counteracts the increase of the coefficient of friction expected due to the presence of hematite.

Zugriff

Zugriff prüfen

Verfügbarkeit in meiner Bibliothek prüfen

Bestellung bei Subito €

Exportieren, teilen und zitieren

Dokumentinformationen

Titel :

Influence of environmental conditions and oxidation on the coefficient of friction using microalloyed rail steels

Beteiligte:

Viesca, JL (Autor:in) / González-Cachón, S (Autor:in) / García, A (Autor:in) / González, R (Autor:in) / Bernardo-Sánchez, A (Autor:in) / Hernández Battez, A (Autor:in)

Erschienen in:

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit ; 235 , 3 ; 353-360

Erscheinungsdatum :

2021-03-01

Format / Umfang :

8 pages

ISSN :

0954-4097 , 2041-3017

DOI :

https://doi.org/10.1177/0954409720925682

Medientyp :

Aufsatz (Zeitschrift)