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本文通过对AP_1和PD_1钢轨钢及65Mn钢接触疲劳试样和实际钢轨的接触表面、剥落断口和垂直于接触面的剖面进行金相及扫描电镜分析,初步总结出钢轨钢接触疲劳裂纹的萌生与扩展规律及断口微观形貌特征。
In this paper, metallographic and SEM analyzes of the contact surface, the fracture surface and the cross section perpendicular to the contact surface between the AP_1 and PD_1 rail steel and the 65Mn steel contact fatigue specimen and the actual rail were carried out to summarize the initiation and Expansion law and fracture morphology.