Effects of S and RE on the Modification of Fe-Rich Intermetallics in Recycled Al-Si Alloys

Yang Huaide; Long Siyuan; Wu Xingyu; Fan Chao; Li Cong

doi:10.15980/j.tzzz.2013.09.002

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Effects of S and RE on the Modification of Fe-Rich Intermetallics in Recycled Al-Si Alloys
Vol. 33, Issue 9, Pages: 848-851(2013)
Published： 2013 ，
DOI： 10.15980/j.tzzz.2013.09.002

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[1]杨怀德,龙思远,吴星宇,范超,李聪.S和稀土对再生铝合金富Fe相变质行为的影响[J].特种铸造及有色合金,2013,33(09):848-851.

Yang Huaide, Long Siyuan, Wu Xingyu, et al. Effects of S and RE on the Modification of Fe-Rich Intermetallics in Recycled Al-Si Alloys. [J]. Special Casting & Nonferrous Alloys 33(9):848-851(2013)
[1]杨怀德,龙思远,吴星宇,范超,李聪.S和稀土对再生铝合金富Fe相变质行为的影响[J].特种铸造及有色合金,2013,33(09):848-851. DOI： 10.15980/j.tzzz.2013.09.002.

Yang Huaide, Long Siyuan, Wu Xingyu, et al. Effects of S and RE on the Modification of Fe-Rich Intermetallics in Recycled Al-Si Alloys. [J]. Special Casting & Nonferrous Alloys 33(9):848-851(2013) DOI： 10.15980/j.tzzz.2013.09.002.

摘要

研究了S、稀土对再生铝合金中富Fe相变质行为的影响。采用光学显微镜（OM）、扫描电镜（SEM）对试样组织进行了形貌观察

利用能谱仪（EDX）对生成相进行了成分分析。结果表明

S元素单独作用于再生铝合金时

会促使β-Fe相转化为α-Fe相

且随着S含量的增加

α-Fe相尺寸增大。S和稀土一起作用于再生铝合金时

稀土会通过影响骨骼状α-Fe相形核率和生长速率

从而使骨骼状α-Fe相细化。

Abstract

Effects of Sulphur and RE on the modification of Fe-rich intermetallics in recycled Al-Si alloys contained lower Mn、Fe were investigated.Microstructure morphology of the alloy samples was observed by optical microscope（OM）and scanning electric microscope（SEM）

and phases constituent was analyzed by energy dispersive X-ray（EDX）.The results indicate that S can promote transformation of skeleton-likeα-Fe phase from needle-like β-Fe phase

and the size of α-Fe phase is increased with increasing in Sulphur content.When Surphur and RE are added

concentration of RE in front of solid-liquid interface can refine skeleton-likeα-Fe phase by influencing nucleation and growth rate of skeletonl-likeα-Fe phase.