1前言 钢轨焊接是地铁及城市轻轨轨道结构无缝线路中的关键技术,采用全焊接无缝线路,优化地铁车辆运行环境,对于提高轨道、车辆寿命,提高乘客舒适度,减小噪声污染都具有重要意义。因此,世界各国城市地铁都广泛采用了这一技术。无缝线路焊接方法大约有4种:闪光焊、气压焊、铝热焊和强迫成型 1 Preface Rail welding is the key technology in the seamless track of metro and urban light rail track structure. It adopts all-welded seamless track to optimize the running environment of subway vehicles. It is of great significance to improve track and vehicle life, improve passenger comfort, reduce noise pollution All have important meaning. Therefore, this technology is widely adopted by urban metro in all countries in the world. There are about 4 types of welding methods for seamless wiring: flash welding, air pressure welding, thermoforming and forging