Effects of Mn/Fe Mass Ratio Mass Ratio on Microstructure and Properties of Hypereutectic Al-Si Alloy with Higher Iron Content

Wen Shenliu; Li Linxin; Chen Xianjun

doi:10.15980/j.tzzz.2014.12.025

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Effects of Mn/Fe Mass Ratio Mass Ratio on Microstructure and Properties of Hypereutectic Al-Si Alloy with Higher Iron Content
Vol. 34, Issue 12, Pages: 1319-1322(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.12.025

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[1]文申柳,李林鑫,陈显均.Mn、Fe质量比对Al-15Si-3Fe合金组织与性能影响[J].特种铸造及有色合金,2014,34(12):1319-1322.

Wen Shenliu, Li Linxin, Chen Xianjun. Effects of Mn/Fe Mass Ratio Mass Ratio on Microstructure and Properties of Hypereutectic Al-Si Alloy with Higher Iron Content. [J]. Special Casting & Nonferrous Alloys 34(12):1319-1322(2014)
[1]文申柳,李林鑫,陈显均.Mn、Fe质量比对Al-15Si-3Fe合金组织与性能影响[J].特种铸造及有色合金,2014,34(12):1319-1322. DOI： 10.15980/j.tzzz.2014.12.025.

Wen Shenliu, Li Linxin, Chen Xianjun. Effects of Mn/Fe Mass Ratio Mass Ratio on Microstructure and Properties of Hypereutectic Al-Si Alloy with Higher Iron Content. [J]. Special Casting & Nonferrous Alloys 34(12):1319-1322(2014) DOI： 10.15980/j.tzzz.2014.12.025.

摘要

利用显微镜观察、SEM、EDS以及XRD分析等手段

研究了不同Mn、Fe质量比对Al-15Si-3Fe合金中的富Fe相形态和性能的影响。结果表明

Al-15Si-3Fe合金中加入Mn后

富Fe相形态由尺寸较长的针状β相和σ相向鱼骨状、三叶状的α相转变

有利于降低Fe元素给合金力学性能带来的不利影响。同时合金中富Fe相会出现大量团聚重叠现象

且这种现象随着Mn、Fe含量比的增大而加剧

这会导致合金力学性能不断降低。

Abstract

Using a optical microscope

SEM

EDS and XRD analysis method

effects of different w（Mn）/w（Fe）ratio on the Fe-enrichment phase morphology and performance of the hypereutectic aluminum silicon alloy with high iron content were investigated.Results show that the Fe-enrichment phase morphology in Al-15Si-3Fe with addition of Mn is transformed from long acicularβphase andσphase into herringbone and trifoliateαphase

which is helpful for reducing the negative influence of Fe element on the mechanical properties of the alloy.However

Fe-enrichment phase in the alloy will agglomerate with increasing in Mn addition

and it becomes serious as w（Mn）/w（Fe）increases

leading to decrease of mechanical properties of the alloy.