RECALESCENCE EFFECT SIMULATION AND MICROSTRUCTURE EVOLUTION OF UNDERCOOLED Fe82B17Si1 ALLOY
Received date: 2013-12-13
Revised date: 2014-04-22
Online published: 2014-07-20
Supported by
Supported by National Natural Science Foundation of China (No.51101169), Fundamental Research Funds for the Central Universities (No.2014QNA07) and China Postdoctoral Science Foundation (No.2013M540475)
通过熔融玻璃净化与循环过热相结合的方法获得过冷度ΔT=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≤ΔT<75 K时, Fe82B17Si1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≤ΔT<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≤ΔT<250 K时, 凝固组织由不同含量的初生a-Fe相和枝晶间深过冷非规则共晶组织组成; 当ΔT >250 K时, 凝固组织为完全非规则共晶组织.
Key words： Fe82B17Si1 alloy; JMAK model; undercooling; eutectic structure
Zheng CHEN , Yanan YANG , Qiang CHEN , Junfeng XU , Yueyue TANG , Feng LIU . RECALESCENCE EFFECT SIMULATION AND MICROSTRUCTURE EVOLUTION OF UNDERCOOLED Fe82B17Si1 ALLOY[J]. Acta Metall Sin, 2014 , 50(7) : 795 -801 . DOI: 10.3724/SP.J.1037.2013.00813
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