曲轴是柴油机的重要运动件,起传递功率的作用。曲轴质量的优劣,直接影响柴油机的正常运转和机车的安全行车。曲轴的失效一般有两种情况:一种是磨损过限;另一种则是破坏性失效,即曲轴材料疲劳损坏和脆断。疲劳损坏可以因曲轴工作超负荷而引起,也可以由材料的不均匀性所引起,或者是两者综合的结果。为了排除材料不均匀 Crankshaft is an important diesel engine moving parts, the role of transmission power. The pros and cons of crankshaft quality, a direct impact on the normal operation of diesel engines and locomotives safe driving. Crankshaft failures generally have two situations: one is excessive wear and tear; the other is destructive failure, that is, fatigue damage and brittle fracture of the crankshaft material. Fatigue damage can be caused by work overload of the crankshaft, it can also be caused by material inhomogeneities, or a combination of the two. In order to exclude uneven material