通过熔融玻璃净化与循环过热相结合的方法获得过冷度△T=6～280 K范围内的Fe82B17Si1共晶合金的凝固组织演变;结合突变方程和JMAK模型拟合凝固过程的冷却曲线,拟合结果符合Fe82B17Si1共晶合金的组织类型及形态随过冷度的变化规律.结果表明,当6 K≤△T＜75 K时,Fes2B17Si1合金中形成了复杂规则共晶及准规则共晶组成的混合共晶组织;当75 K≤△T＜180 K时,凝固组织由混合共晶组织和深过冷非规则共晶组织组成;当180 K≤△T＜250 K时,凝固组织由不同含量的初生α-Fe相和枝晶间深过冷非规则共晶组织组成;当△T＞250 K时,凝固组织为完全非规则共晶组织.
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