球墨铸铁灰斑断口分析

Analysis of Gray Spots in Fractures of Ductile Iron

对球铁发斑断口的宏观组织、微观组织和形成机制作了分析，并对灰斑与显微组织的关系作了描述。

The macro- and microstructures of gray spots in fractures of ductile iron and mechanism of their formation were analysed, and the relations of gray spots with microstructures were qantitatively discribed.