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引言车轮、钢轨是铁路运输系统的主要组成部件,用量大、消耗多,其质量好坏直接影响着铁路运输效率、经济性以及安全性.运输是国民经济中的动脉,我国铁路运输尤显重要.据统计,铁路承担的货运占各种运输方式的73%,铁路承担的客运占63%.我国幅员辽阔,地区温差很大,地形不一,山区铁路占的比重较多,半径小,隧道多,并且是客、货混流状态,行车密度较大.而且由于运输量和运输质量不断提高的需要,
Introduction The wheels and rails are the main components of the railway transportation system, which consume a great amount of energy and have a direct impact on the efficiency, economy and safety of railway transportation.Transportation is the artery in the national economy, and the railway transportation in our country is especially important According to statistics, 73% of all modes of transport undertaken by the railway and 63% of the passenger transport undertaken by the railway are large-scale areas in China with large temperature differences and terrain differences, with a large proportion of mountainous railways and a small radius of tunnels More, and is the passenger, mixed flow state, traffic density greater.And because of the volume of transport and the continuous improvement of the quality of transport needs,