Microstructure of Rapidly Solidified Cu<sub>83</sub>Fe<sub>17</sub> Alloys

Zhou Zhiming1; Cao Minmin1; Chen Yuanfang1; Tang Liwen1; Wang Yaping2

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Microstructure of Rapidly Solidified Cu₈₃Fe₁₇ Alloys
Vol. 29, Issue 8, Pages: 690-692(2009)
Published： 2009 ，
DOI：

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[1]周志明,曹敏敏,陈元芳,唐丽文,王亚平.快速凝固Cu_(83)Fe_(17)合金的显微组织[J].特种铸造及有色合金,2009,29(08):690-692+679.

Zhou Zhiming1, Cao Minmin1, Chen Yuanfang1, et al. Microstructure of Rapidly Solidified Cu₈₃Fe₁₇ Alloys. [J]. Special Casting & Nonferrous Alloys 29(8):690-692(2009)
[1]周志明,曹敏敏,陈元芳,唐丽文,王亚平.快速凝固Cu_(83)Fe_(17)合金的显微组织[J].特种铸造及有色合金,2009,29(08):690-692+679. DOI：

Zhou Zhiming1, Cao Minmin1, Chen Yuanfang1, et al. Microstructure of Rapidly Solidified Cu₈₃Fe₁₇ Alloys. [J]. Special Casting & Nonferrous Alloys 29(8):690-692(2009) DOI：

摘要

通过采用扫描电镜（SEM）研究了真空感应熔炼和单辊旋铸Cu83Fe17合金的显微组织和凝固行为。结果表明

真空感应熔炼Cu83Fe17合金的显微组织主要以初生的富Fe枝晶形式存在于Cu基体中

单辊旋铸Cu83Fe17合金的显微组织呈现富Fe枝晶和富Fe球状并存的两种形貌。富Fe相的形貌和大小随着条带厚度的变化而变化。富Fe球的大小分布不均

靠近自由面的富Fe球直径比接触面要大。分析表明

合金快速凝固过程中发生了亚稳态的液相分离。此外

采用一维热传导方程对Cu83Fe17合金的冷却速度进行模拟

计算得到合金条带自由侧在凝固时的冷却速度为1.5×106K/s。

Abstract

Microstructure and solidification behavior of inducing melted Cu83Fe17 alloys and melt spun Cu83Fe17 alloys were investigated by scanning electron microscope （SEM）. The results show that microstructure consists of fine primary Fe-rich dendrite existed in Cu-rich matrix in vacuum inducing melted Cu83Fe17 alloy

while both Fe-rich dendrites and Fe-rich spheroids appear in microstructure of melt-spun Cu83Fe17 alloy. The morphology and size of the Fe-rich phase are varied greatly with the change of ribbon thickness. The diameter of Fe-rich spheroids nearby surface-free is more than that nearby contacted surface

exhibiting non-uniform distribution

which is attributed to the appearance of metastable liquid phase separation during rapid solidification. In addition

the cooling rate for Cu83Fe17 alloy was calculated by one-dimensional heat conduction equation

and cooling rate of 1.5×106 K/s can be obtained at surface-free of the alloy ribbons with 200 μm in thickness.