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Wear Characteristics of Wheel/Rail Material under Dry and Wet Conditions

건식 및 수분조건에 따른 차륜/레일의 마모특성 평가

Seo, Jung Won;Kwon, Suk Jin;Jun, Hyun Kyu;Lee, Dong Hyeong
서정원;권석진;전현규;이동형

  • Received : 2016.05.02
  • Accepted : 2016.06.20
  • Published : 2016.07.01

Abstract

Rolling contact fatigue and wear on rails are inevitable in railway operations due to excessive wheel-rail contact stress. The wear is influenced by vehicle speed, contact pressure, environmental conditions, and many other factors. Speeding on a curved track causes many problems such as wear on the gauge of the rail and rolling contact fatigue. Managing environmental conditions can reduce problems on the wheel and rail interface. In this study, the wear characteristics of wheel and rail materials were investigated by twin-disc testing using various parameters. The results of the wear test indicated that the wear rate under dry conditions was larger than that under wet conditions. We found that contact fatigue damage occurred on the rail in dry conditions, however, the surface of the specimen under water remained smooth. Also, the friction coefficient in dry conditions was larger than in wet conditions.

Keywords

Railway wheel;Rail;Wear;Twin-Disc test

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Acknowledgement

Supported by : 한국철도기술연구원