Influence of Sr、Fe、Cu on Properties of Die Casting A356 Aluminum Alloys

Zhu Shuqing; Long Siyuan; Wang Huifang; Wu Xingyu; Yang Chengzhi

doi:10.15980/j.tzzz.2014.11.015

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Influence of Sr、Fe、Cu on Properties of Die Casting A356 Aluminum Alloys
Vol. 34, Issue 11, Pages: 1169-1172(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.11.015

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[1]朱姝晴,龙思远,王慧芳,吴星宇,杨承志.Sr、Fe、Cu对压铸A356合金性能的影响[J].特种铸造及有色合金,2014,34(11):1169-1172.

Zhu Shuqing, Long Siyuan, Wang Huifang, et al. Influence of Sr、Fe、Cu on Properties of Die Casting A356 Aluminum Alloys. [J]. Special Casting & Nonferrous Alloys 34(11):1169-1172(2014)
[1]朱姝晴,龙思远,王慧芳,吴星宇,杨承志.Sr、Fe、Cu对压铸A356合金性能的影响[J].特种铸造及有色合金,2014,34(11):1169-1172. DOI： 10.15980/j.tzzz.2014.11.015.

Zhu Shuqing, Long Siyuan, Wang Huifang, et al. Influence of Sr、Fe、Cu on Properties of Die Casting A356 Aluminum Alloys. [J]. Special Casting & Nonferrous Alloys 34(11):1169-1172(2014) DOI： 10.15980/j.tzzz.2014.11.015.

摘要

采用光学显微镜、扫描电镜对试样微观组织进行了形貌观察

采用X射线衍射分析仪、能谱仪分别对试样进行了相分析与相成分分析

研究了Sr、Fe、Cu对压铸Al-Si系合金的性能和微观组织的影响。结果表明

Sr对压铸铝合金中的Si有一定的变质效果

但对性能的提升效果不明显。Fe含量达到0.8%时

组织中开始出现针状β-Fe相和初生α-Fe相。Cu可以提高合金的强度

但剧烈降低合金塑性

Cu含量较高时

组织中会出现N-Al7Cu2Fe相和W-Al2Si4Mg5Cu4相。

Abstract

Effects of Sr、Fe and Cu on properties of die casting aluminum alloys were investigated by optical microscope（OM）and scanning electric microscope（SEM）

X-ray diffraction（XRD）and energy dispersive X-ray（EDS）

respectively.The results reveal that Sr exhibits modification effect on die casting aluminum alloys to some extent

however

it takes little increase of strength.When the Fe content reaches 0.8%

needle-likeβ-Fe phase and primaryα-Fe phase can be observed in the microstructure of the alloy.Cu can improve the strength of the aluminum alloys.However

it will reduce the ductility sharply.With a higher Cu content

N-Al7Cu2 Fe and W-Al2Si4Mg5Cu4 can be precipitated from the microstructure of the alloy.