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http://dx.doi.org/10.9725/kstle.2014.30.6.364

A Study on the Rail Materials Technology for Subway Based on its Sliding Wear Behavior  

Lee, Han-Young (Dept. of Advanced Materials Engineering, Keimyung University)
Publication Information
Tribology and Lubricants / v.30, no.6, 2014 , pp. 364-369 More about this Journal
Abstract
To assess the wear behavior of rails against subway rail car wheels, we investigate the sliding wear behavior of pins derived from two types of rails (normal rails and heat-treated rails) against a disc derived from a subway rail car wheel, using a pin-on-disc-type tribometer. We base the sliding wear test conditions on the sliding conditions for wheel flange-rail gauge corner contact. We demonstrate the remarkable transition in the wear behavior of the pins derived from the rails, from severe wear to mild wear, as a function of the sliding distance. The wear rate of the heat-treated rail material in the running-in wear region is much lower than that of the normal rail material. Furthermore, the wear rates of the pins in the running-in wear region decrease with increasing hardness and with decreasing sliding speed. However, there is little difference between the heat-treated rail pin and the normal rail pin in the wear rate in the steady-state wear region. Stricter controls on the decarburized layer beneath the surface of rails are required to reduce the wear rate in the running-in wear region.
Keywords
rail material; wheel material; sliding wear behavior; decarburized layer;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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