减速机齿轮断裂失效分析
Fracture Analysis of Gears of a Speed Reducer
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摘要: 某搅拌器减速机齿轮轴和齿轮在服役1 a后发生了断裂失效;通过显微组织分析、断口分析、力学性能测试等方法对其失效原因进行了分析.结果表明:轴和齿轮的断裂均为疲劳断裂,轴的断裂先于齿轮的断裂;搅拌轴装配不当造成的过载是导致轴首先产生疲劳断裂的原因.Abstract: The failure of a shaft and gears of a speed reducer after serving for a year was investigated by means of microstructure observetion,scanning electron microscopy (SEM),hardness test and tension test.The results showed that the failure of the shaft and gears was fatigue fracture and the fracture of the shaft occurred firstly.The fatigue crack initiated from an overload.Incorrect assemble was responsible for the overload of the shaft.