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运用光学显微镜、扫描电镜等仪器,分析了16V240柴油机喷油泵柱塞弹簧在台架试验和机车试车期间发生断裂的原因。结果表明:弹簧断裂的原因是热处理质量欠佳、坯材表面质量较差和混入异种钢材造成的。
Using optical microscope and scanning electron microscope (SEM), the causes of fracture of 16V240 diesel injection plunger pump spring were analyzed during bench test and locomotive test. The results show that the reason of spring breakage is that the quality of heat treatment is poor, the surface quality of the slab is poor and mixed with dissimilar steel.