Effects of Phase-transformation-cooling Method on Microstructure of A356 Cast Aluminum Alloy

Zhang Lianyong~1; Zhou Bide~1; Zhan Zaiji~2; Jia Yuanzhi~1; Fan Changzeng~1; Wang Wenkui~2

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Effects of Phase-transformation-cooling Method on Microstructure of A356 Cast Aluminum Alloy
Issue 11, Pages: 698-700(2006)
Published： 2006 ，
DOI：

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[1]张连勇,周彼德,战再吉,贾元智,范长增,王文魁.锡冷铜模对铸造A356铝合金组织的影响[J].特种铸造及有色合金,2006(11):698-700+676.

Zhang Lianyong~1, Zhou Bide~1, Zhan Zaiji~2, et al. Effects of Phase-transformation-cooling Method on Microstructure of A356 Cast Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys (11):698-700(2006)
[1]张连勇,周彼德,战再吉,贾元智,范长增,王文魁.锡冷铜模对铸造A356铝合金组织的影响[J].特种铸造及有色合金,2006(11):698-700+676. DOI：

Zhang Lianyong~1, Zhou Bide~1, Zhan Zaiji~2, et al. Effects of Phase-transformation-cooling Method on Microstructure of A356 Cast Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys (11):698-700(2006) DOI：

摘要

分别采用锡冷铜模和水冷铜模两种方法制备了A356铸造铝合金。运用扫描电子显微镜（SEM）、示差扫描量热法（DSC）、X射线衍射（XRD）和透射电子显微镜（TEM）对其组织进行研究。结果表明

与水冷铜模冷却方法相比

锡冷铜模方法可以明显细化A356合金的初生α相和共晶组织。通过对X射线衍射数据的计算

在锡冷铜模制备的样品中

Si在初生α相中的固溶度为2·7%（摩尔分数）

而在水冷铜模制备的样品中为2·4%（摩尔分数）。这些结果表明

锡冷铜模方法比水冷铜模方法具有更好的冷却能力。

Abstract

The microstructures of A356 cast aluminum alloy prepared by phase-transformation-cooling method and by water-cooling in Cu mold have been observed by SEM（scanning electron microscopy）

DSC

XRD and TEM. Compared with that made by water-cooling in Cu mould

the primary α-phase and eutectic structure in A356 cast aluminum alloy made by phase-transformation-cooling method is greatly refined. The calculation from XRD measuring value shows that the solid solution degree of Si in primary α-phase is 2.7 %（in atom） in samples prepared by phase-transformation-cooling method while is 2.4 % （in atom ） in ones made by water-cooling in Cu mould

which demonstrates that Sn-quenching exhibits better cooling ability than water-cooling in Cu mould.