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节约能源,降低运输成本,在国民经济建设中有着特殊重要的意义。我国物资交流的主要运输工具是铁路,降低铁路车辆自重,在节约能源,增加货运量,降低运输费用方面的经济效益是显而易见的。由于铝及铝合金的比重小,只有钢的三分之一左右;比强度高;耐腐蚀性能好;成形加工性能好;资源丰富,在铁路货车制造上获得了越来越广泛的应用。采用铝材制造铁路专用货车的优点有:与同样装载量的普通钢材车辆
To save energy and reduce transportation costs has a special significance in the national economy. The main means of transport for the exchange of materials in our country is the railway. It is obvious that the economic benefits of reducing the weight of railway vehicles and saving energy, increasing the volume of freight and lowering the transportation cost are obvious. As the proportion of aluminum and aluminum alloy is small, only about one-third of the steel; high strength; corrosion resistance; good forming performance; rich in resources, in the manufacture of railway trucks has been more and more widely used. The advantages of using aluminum for railway trucks are the same as that of ordinary steel vehicles with the same loading capacity