强磁场下工艺制度对Fe-49Sn偏晶合金显微组织及磁性能的影响

左小伟; 王恩刚; 韩欢; 张林; 赫冀成

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强磁场下工艺制度对Fe-49Sn偏晶合金显微组织及磁性能的影响
Influence of Processing History on Microstructure and Magnetic Properties of Fe-49 Sn Monotectic Alloys under High Magnetic Field
2008年第S1期页码：482-485
纸质出版日期： 2008 ，
DOI：

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[1]左小伟,王恩刚,韩欢,张林,赫冀成.强磁场下工艺制度对Fe-49Sn偏晶合金显微组织及磁性能的影响[J].特种铸造及有色合金,2008(S1):482-485.

Zuo Xiaowei Wang Engang Han Huan Zhang Lin He Jicheng. Influence of Processing History on Microstructure and Magnetic Properties of Fe-49 Sn Monotectic Alloys under High Magnetic Field[J]. Special Casting & Nonferrous Alloys, 2008,(S1):482-485.
[1]左小伟,王恩刚,韩欢,张林,赫冀成.强磁场下工艺制度对Fe-49Sn偏晶合金显微组织及磁性能的影响[J].特种铸造及有色合金,2008(S1):482-485. DOI：

Zuo Xiaowei Wang Engang Han Huan Zhang Lin He Jicheng. Influence of Processing History on Microstructure and Magnetic Properties of Fe-49 Sn Monotectic Alloys under High Magnetic Field[J]. Special Casting & Nonferrous Alloys, 2008,(S1):482-485. DOI：

摘要

研究了5T强磁场下不同工艺制度对Fe-49Sn偏晶合金显微组织及其磁性能的影响。结果表明

在较低的冷却速率下

改变冷却速率对强磁场下Fe-49Sn偏晶合金的显微组织及其磁性能影响较小。而延长保温时间使得富Fe枝晶明显粗化

能显著增加磁性能。理论分析表明

强磁场下延长保温时间使得Fe-49Sn偏晶合金富Fe相充分扩散

枝晶臂粗化

合金磁各向异性能增加

由此增加其磁导率;而较低的冷却速率对合金显微组织和磁各向异性能影响较小

因而对磁导率影响不大。

Abstract

The influence of processing history on microstructure and magnetic properties of Fe-49%Sn monotectic alloys under 5T high magnetic field have been investigated. The results showed that the cooling rates had little effect on microstructure and magnetic properties as it is slow. However

the Fe-rich phases were obviously coarsened when prolonging holding times under high magnetic field and then its magnetic properties were induced to enhance. Theoretical analysis showed that the solute diffusion in Fe-rich dendrite phases were accelerated

and the dendrite was coarsened when prolonging holding times under high magnetic field. moreover the magnetic anisotropy energy of Fe-49%Sn alloys was induced to increase

so that the magnetic permeability enhances. However

in these experiments

the weak cooling rate has a little effect on the microstructure and magnetic anisotropy energy

so its variety of magnetic permeability is small.