本文对珠光体球铁常温下小能量多次冲击断口进行了宏观和微观的分析;提供了一组珠光体球铁小能多冲断口微观形貌的电子显微镜照片;根据断口分析所得结果,对珠光体球铁具有良好小能多冲抗力的原因进行了讨论。 In this paper, macroscopic and microscopic analysis of small energy multiple impact fracture of pearlite dumbbell at room temperature was carried out. A set of electron micrographs of microscopic morphology of pearlite ductile iron micro-fracture surface was provided. According to the results of fracture analysis, The reason why pearlite ductile iron has good resistance to small impact is discussed.