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轻轨主要用于森林、煤矿运输轨道。要求有较高耐磨、耐蚀性,特别是在矿井中,腐蚀情况相当严重。不同的矿井中水的PH值不同,一般为2～10。即有的呈酸性,有的呈碱性。在很多情况下,轨头磨损并不严重,但由于轨底腐蚀严重固定不牢而报废。据用户反映,按我国YB220—78标准生产的轻轨,一般寿命为7～8年,而进口轻轨的平均寿命为10年以上。影响轻轨寿命的主要因素是钢轨的化学成份和断面形状。我国冶标轻轨与日本JIS标准轻轨的化学成份相差不大,如表1所示。而断面形状,二者差别较为明显。JIS标准轻轨轨形矮、轨腰厚、轨头宽、轨底大而厚;我国冶标轻轨则轨形高、轨腰薄、轨头窄、轨底小而薄,如图1所示。
Light rail is mainly used for forest, coal transport track. Requires a higher wear resistance, corrosion resistance, especially in the mine, the corrosion situation is quite serious. Different mine water PH value is different, generally 2 to 10. Some are acidic, some alkaline. In many cases, rail head wear is not serious, but due to the serious corrosion of rail bottom fixed and scrapped. According to the users, the light rail produced by China’s YB220-78 standard generally has a life span of 7-8 years, while the average life span of imported light railways is 10 years or more. The main factors affecting light rail life are the chemical composition and cross-sectional shape of the rail. China’s standard light rail and Japan’s JIS standard light rail or less chemical composition, as shown in Table 1. The cross-sectional shape, the difference between the two obvious. JIS standard light rail shape short, thick rail waist, rail head wide, thick and thick rail; railways in China is the standard light rail, rail waist thin, narrow rail, rail at the end of small and thin, as shown in Figure 1.