闪光接触焊是发展无缝线路钢轨焊接的主要工艺之一。虽然近年来各焊轨单位和科研部门对于钢轨接触焊的工艺,做了许多试验研究,力求获得优良的钢轨焊接质量。但是,焊接钢轨的断裂现象仍时有发生,严重危及行车安全。接触焊钢轨的断裂有多种形式,如沿焊合线的断裂,大多属于严重“灰斑”或“光板”未很好焊合所致,原因比较明显,属于焊接工艺问题。但是,经常碰到的另一类接触焊钢轨S形断裂,却较难分析其原因。给工务部门带来 Flash contact welding is the development of seamless rail welding one of the major processes. Although in recent years the welding track units and scientific research departments for rail contact welding process, do a lot of experimental research, and strive to obtain excellent rail welding quality. However, the rupture of welded rails still occurs from time to time, seriously endangering traffic safety. There are many forms of fracture of the contact welded rail, such as the fracture along the weld line, most of them are caused by the serious “gray spot” or “light plate” welding, which is obvious due to the welding process. However, often encountered another type of contact welded steel S-shaped fracture, but more difficult to analyze the reasons. Brought to the work department