철도차량 차륜의 압축잔류응력 특성 및 마모한계 연구

Abstract

In this paper, a study was conducted to prove that the compressive residual stress of the wheel is the main factor for the wear limit of the wheel. The wear limit for steel wheels (hereafter wheels) of domestic railway vehicles has been managed in terms of structural strength design by railway vehicle manufacturers, but studies in terms of the residual compressive stress of the wheels are insignificant. The principle of the generation of compressive residual stress in the rolling process and heat treatment process of the wheel was studied. In addition, the effect of the compressive residual stress on the fatigue failure of the wheel was studied, and the standard specifications and inspection methods for the compressive residual stress were considered. In the course of these studies and reviews, it was verified that the compressive residual stress is the main basis for determining the wear limit of the railway vehicle wheel.