A356合金熔体中Al<sub>2</sub>O<sub>3</sub>夹杂对变质剂Sr的影响

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[1]葛学元,李建国,谭红艳,何迁.A356合金熔体中Al_2O_3夹杂对变质剂Sr的影响[J].特种铸造及有色合金,2007(S1):77-79.

Ge Xueyuan Li Jianguo Tan Hongyan He Qian. Influence of Alumina on Modifier Strontium in Molten A356 Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(S1):77-79.
[1]葛学元,李建国,谭红艳,何迁.A356合金熔体中Al_2O_3夹杂对变质剂Sr的影响[J].特种铸造及有色合金,2007(S1):77-79. DOI：

Ge Xueyuan Li Jianguo Tan Hongyan He Qian. Influence of Alumina on Modifier Strontium in Molten A356 Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(S1):77-79. DOI：

通过XRD、SEM等分析手段研究了A356合金熔体中Al2O3夹杂与变质剂Sr之间所发生的反应及其反应机制

结果发现Sr可以与Al2O3经过一系列反应生成Sr-Al-O化合物

由此造成了Sr的损耗

生成的Sr-Al-O化合物可溶于水。在Al-Si合金熔体中加入Sr后

游离态的Sr与Si会首先生成SrSi2

而后在熔体中发生三元共晶反应

生成的Al2Si2Sr化合物呈块状或条状分布。研究还发现存在Al-Si-O化合物

它覆在Al2Si2Sr化合物表面。

The mechanism of the reactions between alumina and modifier strontium in molten A356 alloy have been investigated

by means of XRD and SEM.The results showed that there have been a series of reactions between them

forming the kind of compounds Sr-Al-O

which are water-soluble

and this led to the consumption of strontium.When adding strontium into the molten Al-Si alloys

the SrSi2 would form firstly

and then the Al2Si2Sr compound formed through ternary eutectic reaction

which appeared in the shape of both bulk and strip.The Al-Si-O compound was also found which laid over the Al2Si2Sr compound.

A356合金Al2O3SrSr-Al-O化合物Al2Si2Sr化合物

A356 AlloyAluminaSrSr-Al-O CompoundsAl2Si2Sr Compounds

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A356合金熔体中Al2O3夹杂对变质剂Sr的影响