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对高锰钢与钢轨钢二次闪光对焊接头的疲劳性能进行了研究，并对其断口形貌进行了扫描电镜观察．研究结果表明：高锰钢与钢轨钢二次闪光对焊接头具有较高的弯曲疲劳性能，其疲劳强度超过了高锰钢母材．
The fatigue properties of secondary flash butt welded joints of high manganese steel and rail steel were studied, and the fracture appearances were observed by scanning electron microscopy. The research results show that the secondary flash butt welded joints of high manganese steel and rail steel have high bending fatigue properties and their fatigue strength exceeds that of high manganese steel base metal.