沙漠环境中轨道顶部不同沉积沙密度下不同材料匹配的轮轨的磨损和破坏行为

IF 5.3 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear Pub Date : 2024-11-04 DOI:10.1016/j.wear.2024.205622

K. Shu , N. Zani , L. Ghidini , C. Petrogalli , L.L. Yu , A. Mazzù , H.H. Ding , W.J. Wang

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引用次数: 0

摘要

在沙漠环境中，由于铁路是一个开放系统，沙粒沉积在轨顶并污染轮轨界面的现象十分普遍。本研究旨在探讨在沙漠环境中，不同材料匹配的轮轨在轨顶不同沙粒沉积密度下的磨损和损伤行为。结果表明，随着沙子沉积密度的增加，附着系数先急剧下降，然后缓慢上升，最后缓慢下降。这是砂的固体润滑、氧化物的固体润滑以及车轮和钢轨表面粗糙度共同作用的结果。氧化磨损首先增加，在约 0.2 g/m2 时达到峰值，然后减小，而疲劳磨损则持续减小。对于硬度相近的轮轨材料，高含碳量的轮轨材料匹配具有优异的抗磨损和抗疲劳性能。砂沉积密度低于 0.4 g/m2 时，轮轨的磨损和损坏相对较轻。

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Wear and damage behaviors of wheel-rail with different material matchings under various sand deposition densities of rail top in desert environments

In desert environments, the phenomenon of sand particles depositing on the rail top and contaminating the wheel-rail interface is common because the railway is an open system. This work aimed to investigate the wear and damage behaviors of wheel-rail with different material matchings under various sand deposition densities of rail top in desert environments. The results showed that as sand deposition density increased, adhesion coefficient first decreased sharply and then increased slowly, and finally decreased slowly. It was caused by the combined effect of sand solid lubrication, oxide solid lubrication, and surface roughness of wheel and rail. The oxidative wear increased first, peaking at about 0.2 g/m², and then decreased, whereas the fatigue wear decreased consistently. For wheel and rail materials with similar hardness, the wheel-rail material matching with high carbon content exhibited excellent anti-wear and anti-fatigue performances. The wear and damage of wheel and rail were relatively mild when the sand deposition density was lower than 0.4 g/m².

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来源期刊

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.