By SEM the micro appearance of main fracture conformed to characteristics of flake fracture.
通过SEM观察，可知主断口微观形貌符合白点断口特征。
The conventional viewpoint, which takes flake graphite as voids and cracks, neglects the studying of its fracture behavior and thus limits the deepening under-standing of cast iron nature.
把片状石墨看作孔洞与裂纹的传统观点，忽略了对片墨在断裂过程中的行为进行研究，因此，也限制了对铸铁本质认识的深化。
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