Characteristics and Influencing Factors of Skin Microstructure in High Pressure Die Casting Aluminum Alloys

Ge Jilong; Zhao Haidong; Hu Qiyao; Gao Junmin; Wang Zhuoming

doi:10.15980/j.tzzz.2015.11.015

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Characteristics and Influencing Factors of Skin Microstructure in High Pressure Die Casting Aluminum Alloys
Vol. 35, Issue 11, Pages: 1174-1177(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.11.015

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[1]葛继龙,赵海东,胡启耀,高军民,王卓明.压铸铝合金的表层组织特征及其影响因素分析[J].特种铸造及有色合金,2015,35(11):1174-1177.

Ge Jilong, Zhao Haidong, Hu Qiyao, et al. Characteristics and Influencing Factors of Skin Microstructure in High Pressure Die Casting Aluminum Alloys. [J]. Special Casting & Nonferrous Alloys 35(11):1174-1177(2015)
[1]葛继龙,赵海东,胡启耀,高军民,王卓明.压铸铝合金的表层组织特征及其影响因素分析[J].特种铸造及有色合金,2015,35(11):1174-1177. DOI： 10.15980/j.tzzz.2015.11.015.

Ge Jilong, Zhao Haidong, Hu Qiyao, et al. Characteristics and Influencing Factors of Skin Microstructure in High Pressure Die Casting Aluminum Alloys. [J]. Special Casting & Nonferrous Alloys 35(11):1174-1177(2015) DOI： 10.15980/j.tzzz.2015.11.015.

摘要

铝合金压铸件的表层组织对铸件使用性能有重要的影响。研究不同快压射速度下ADC12铝合金压铸件的表层组织特征

并通过金相和数值模拟进行分析。结果表明

压铸件存在3种不同特征的表层组织:仅含有一层富集致密的初生α-Al相;外层为正常的压铸凝固组织（初生α-Al相和共晶相）邻接细小的初生α-Al相层;属正常的压铸凝固组织。同时

探讨了快压射速度和型腔位置对表层组织的影响。

Abstract

The skin microstructure has a great influence on the performance of the die casting aluminum alloy parts.The characteristics of the skin microstructure of the die casting ADC12 alloy produced at different fast shot speeds was analyzed by means of metallography observation and numerical simulation.It is concluded that there exsits three characteristics of the skin microstructure in the castings:layer with richα-Al

normal microstructure of primaryα-Al and eutectic phase followed by layer with richα-Al

normal microstructure of primaryα-Al and eutectic phase.Effects of the fast shoting speed and distribution of mould cavities on the skin microstructure were analyzed.