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1.序言 近年来,铁路运输正向高轴重、高速化方向发展,钢轨钢的使用条件也愈加恶劣。因此,轨头磨耗和疲劳损伤明显增多,从而缩短了钢轨的使用寿命。要想解决这个问题,就要提高钢轨钢的强度。 将钢轨焊接起来,实现长轨化是防止接头部损伤、增加乘车的舒适感以及消除嗓音等的最好措施。因此,钢轨的可焊性也是重要的使用条件之一。到目前为止,
1. Preamble In recent years, railways are moving towards a high axial load and high-speed direction, and the conditions for the use of rail steels have become even worse. Therefore, the rail head wear and fatigue damage increased significantly, thus shortening the service life of the rail. To solve this problem, it is necessary to improve the strength of rail steel. Weld the rail to achieve long rail is to prevent damage to the connector, increase ride comfort and eliminate the best voice and other measures. Therefore, the weldability of the rail is also one of the important conditions of use. so far,