分析车轴冷切的原因,提出防止冷切的措施,是确保铁路运输安全性的重大课题。本文根据车轴动、静应力的测定结果,阐明车轴运行中的工作应力域,分析了车轴应力与车轴断裂的关系,并根据实物车轴的裂纹扩展速度试验结果,说明车轴断裂过程和防止车轴裂纹扩展的条件,提出了提高车轴安全性的结论与建议。 Analysis of the reasons for the cold-cut axle, put forward measures to prevent cold-cut, is to ensure the safety of railway transport a major issue. Based on the measured results of the dynamic and static stress of the axle, the working stress field in the operation of the axle is expounded. The relationship between the axle stress and the axle fracture is analyzed. According to the experimental results of the crack propagation speed of the physical axle, the axle fracture process and the crack growth prevention The conditions and put forward the conclusion and suggestion of improving axle safety.