采用熔融玻璃净化法使Fe-Co包晶合金实现了深过冷快速凝固.当熔体过冷度较小时,Fe-Co包晶合金的凝固组织为典型的包晶组织.借助电子探针分析和DTA差热分析,证实了非平衡条件下Fe-Co包晶合金凝固过程中发生了包晶反应和包晶转变.研究表明,深过冷Fe-Co包晶合金的非平衡凝固过程从理论上可以划分为4个阶段:初生δ相的形核与生长、包晶反应、包晶转变和γ相的外延生长.
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