冷却速度对Al-4.5Mg-0.7Mn-0.4Er合金固溶度及组织的影响

邢泽炳; 聂祚仁; 邹景霞; 高旭东

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冷却速度对Al-4.5Mg-0.7Mn-0.4Er合金固溶度及组织的影响
Effects of Cooling Rate on Solidification and Microstructure of Al-4.5Mg-0.7Mn-0.4Er Alloy
2007年第9期页码：657-659
纸质出版日期： 2007 ，
DOI：

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[1]邢泽炳,聂祚仁,邹景霞,高旭东.冷却速度对Al-4.5Mg-0.7Mn-0.4Er合金固溶度及组织的影响[J].特种铸造及有色合金,2007(09):657-659+651.

Xing Zebing1, Nie Zuoren1, Zou Jingxia1, et al. Effects of Cooling Rate on Solidification and Microstructure of Al-4.5Mg-0.7Mn-0.4Er Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(9):657-659.
[1]邢泽炳,聂祚仁,邹景霞,高旭东.冷却速度对Al-4.5Mg-0.7Mn-0.4Er合金固溶度及组织的影响[J].特种铸造及有色合金,2007(09):657-659+651. DOI：

Xing Zebing1, Nie Zuoren1, Zou Jingxia1, et al. Effects of Cooling Rate on Solidification and Microstructure of Al-4.5Mg-0.7Mn-0.4Er Alloy[J]. Special Casting & Nonferrous Alloys, 2007,(9):657-659. DOI：

摘要

分别采用铁模浇注、水冷模浇注和半连续铸造3种方式

通过拉伸试验、金相观察、扫描电镜观察、X射线衍射及透射电镜对Al-4.5Mg-0.7Mn-0.4Er合金的力学性能、组织进行了研究

结果发现增大冷却速度可以提高Al-4.5Mg-0.7Mn-0.4Er合金的强度;有利于合金凝固时Er、Mn在Al中形成过饱和固溶体

并且在均匀化退火以后析出形成细小、弥散分布的Al3Er和Al6Mn相。以细小弥散的第二相形式析出的Al3Er是铝合金中的有效强化相

对提高合金的性能、改善合金的组织有益。经过激冷浇注成形

合金的抗拉强度和屈服强度分别提高了14MPa和7MPa

伸长率稍有下降。

Abstract

The mechanical properties and microstructure of Al-4.5Mg-0.7Mn-0.4Er alloy prepared with iron mold

water cooling mold and semi-continuous casting have been described by tensile testing

optical microscope

SEM （scanning electronic microscope）

XRD（X-ray diffraction） and TEM （transmission electron microscope）. It is found that increasing cooling rate can improve the strength of Al-4.5Mg-0.7Mn-0.4Er alloy

and be helpful for the formation of supersaturation solid solubility of Er and Mn element in Al during solidification process and for the precipitation of fine and dispersive Al3Er phase and Al6Mn phase after homogenized annealing treatment. Fine and dispersive Al3Er phase can be acted as the effectively strengthening phase in the Al alloy

which is helpful for improving the mechanical properties and microstructure of the alloy.