采用熔融玻璃净化和循环过热相结合的方法,研究了Fe-Co合金在深过冷快速凝固中的亚稳相。结果表明,当熔体的过冷度达到某一临界数值(△T_(crit))时,亚稳相(b.c.c)在竞争形核中优先形核生长,并在随后的冷却过程中保留在凝固组织中。在γ单相区内等温退火3 h后,亚稳相完全转变为稳定相;在过冷Fe-Co合金的凝固组织中亚稳相是“竞争形核-重熔-γ相外延生长-不完全固态相变”的产物。 The metastable phase of Fe-Co alloy in rapid solidification under deep subcooling was studied by a combination of the purification of molten glass and overheating. The results show that the metastable phase (bcc) preferentially nucleates in the competitive nucleation when the degree of undercooling of the melt reaches a certain critical value (ΔT crit) and remains in the solidified during the subsequent cooling Organized. After the isothermal annealing in γ γ phase for 3 h, the metastable phase completely transformed into the stable phase. In the solidified microstructure of the undercooled Fe-Co alloy, the metastable phase was “competitive nucleation-remelting-γ phase epitaxial growth- Incomplete Solid Phase Transition ”product.