本文通过采用定向凝固技术,观察共晶、亚共晶蠕铁结晶生长过程。结果表明,共晶蠕铁熔体中只有球状雏晶形态一种,球墨雏晶的初始畸变在熔体中发生,蠕墨共晶团形成于液固界面的糊状区;而亚共晶蠕铁熔体中则有球状和虫状两种雏晶形态,球墨雏晶与奥氏体树枝晶接触后。发生初始畸变,共晶团在熔体中初始形成,液固界面糊状区则大量出现。 In this paper, by using directional solidification technology, eutectic, eutectic crystallization of vermicular crystal growth observed. The results show that there is only one kind of globular crystallite in the eutectic vermicularite melt. The initial distortion of nodular crystallite occurs in the melt and the vermicular eutectic form in the paste-like region at the liquid-solid interface. In iron melt, there are two kinds of globular and wormlike forms, such as nodular and austenitic dendrites. Initial distortion occurs, eutectic clusters initially formed in the melt, liquid-solid interface mushy area appears in large numbers.