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서정원(Jungwon Seo),석창성(Changsung Suk),김영진(Yongjin Kim) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.8
Railway wheel and axle are the most critical components in railway system. A wheel and axle failure can cause a derailment with its attendant loss of life and property. The service conditions of railway vehicles have become severe in recent years due to a general increase in operating speeds. Therefore, more precise evaluation of wheelset strength and safety has been desired. Damages of railway wheel are a spalling by wheel/rail contact and thermal crack by braking heat etc. One of the main source of damage is a residual stress. therefore it is important to evaluate exactly. A Residual stress of wheel is formed at the process of heat treatment when manufacturing. it is changed by contact stress developed by wheel/rail contact and thermal stress from heat induced in braking. The objective of this paper is to estimate the variation and magnitude of the residual stress of railway wheel. Consequently, residual stress after heat treatment process was about -370㎫, changed to tensile stress according to braking conditions