Effects of Purity of A356 Alloy on Sr Modification Loss

Jin Huajun

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Effects of Purity of A356 Alloy on Sr Modification Loss
Vol. 31, Issue 2, Pages: 102-104(2011)
Published： 2011 ，
DOI：

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[1]金华军.A356合金纯度对变质元素Sr烧损的影响[J].特种铸造及有色合金,2011,31(02):102-104+199.

Jin Huajun. Effects of Purity of A356 Alloy on Sr Modification Loss. [J]. Special Casting & Nonferrous Alloys 31(2):102-104(2011)
[1]金华军.A356合金纯度对变质元素Sr烧损的影响[J].特种铸造及有色合金,2011,31(02):102-104+199. DOI：

Jin Huajun. Effects of Purity of A356 Alloy on Sr Modification Loss. [J]. Special Casting & Nonferrous Alloys 31(2):102-104(2011) DOI：

摘要

研究了A356合金纯度对锶变质烧损的影响。结果表明

经变质处理的合金其共晶生长温度明显降低

合金组织中Si相呈分枝细密的珊瑚状。精炼处理的Al液

经过280min保温后

Sr的烧损只有33%

表明Sr的变质效果衰退不明显。未经过精炼处理的Al液

在160min后

Sr的烧损已接近50%

至220min

烧损已达78%。

Abstract

Effects of purity of A356 alloy on Sr modification loss were investigated.Eutectic Si phase in the Sr modified alloy exhibits fine coral-shape dendrite as a result of the obvious decrease of eutectic growth temperature.Sr modification loss is only 33% in refined liquid A356 alloy after 280 min

and apparent fading effects of Sr modification can not be observed

while

it reaches approximately 50% in liquid alloy without refined treatment after 160 min

and it is 78% after 220 min.