Effects of Aging Treatment on Microstructures and Properties of Extrusion Casting Al-Mg-Si Alloy

Liu Zheng; Wang Songwei; Wang Feng; Mao Pingli; Wang Fan

doi:10.15980/j.tzzz.2015.01.003

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Effects of Aging Treatment on Microstructures and Properties of Extrusion Casting Al-Mg-Si Alloy
Vol. 35, Issue 1, Pages: 9-13(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.01.003

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[1]刘正,王松伟,王峰,毛萍莉,王帆.时效处理对挤压Al-Mg-Si合金组织及性能的影响[J].特种铸造及有色合金,2015,35(01):9-13.

Liu Zheng, Wang Songwei, Wang Feng, et al. Effects of Aging Treatment on Microstructures and Properties of Extrusion Casting Al-Mg-Si Alloy. [J]. Special Casting & Nonferrous Alloys 35(1):9-13(2015)
[1]刘正,王松伟,王峰,毛萍莉,王帆.时效处理对挤压Al-Mg-Si合金组织及性能的影响[J].特种铸造及有色合金,2015,35(01):9-13. DOI： 10.15980/j.tzzz.2015.01.003.

Liu Zheng, Wang Songwei, Wang Feng, et al. Effects of Aging Treatment on Microstructures and Properties of Extrusion Casting Al-Mg-Si Alloy. [J]. Special Casting & Nonferrous Alloys 35(1):9-13(2015) DOI： 10.15980/j.tzzz.2015.01.003.

摘要

采用正交试验、光学金相显微镜、透射电镜、能谱分析、X射线衍射、拉伸试验及电导率检测等手段

研究了时效处理温度和保温时间对挤压Al-Mg-Si合金组织及性能的影响。结果表明

时效处理能够使合金组织中弥散析出Mg2Si强化相

从而提高合金的力学性能和电导率。其中

时效温度对合金性能的影响比较显著

低温长时间时效处理有利于合金获得良好的综合性能。经190℃×8h时效处理后

合金抗拉强度达到224.3 MPa

电导率可达到36.06 MS/m以上。

Abstract

By means of orthogonal test

optical microscope（OM）

transmission electron microscopy（TEM）

energy dispersive spectrometer（EDS）

X-ray diffraction（XRD）

tensile test and conductivity test

effects of aging temperature and holding time on the microstructure and mechanical properties of extruded Al-Mg-Si alloy were investigated.The results show that aging treatment can lead to the precipitation of the dispersive Mg2 Si phase

improving mechanical properties and electrical conductivity of the alloy.Effect of aging temperature is dominant in mechanical properties of the extruded alloy

and low temperature with long time aging treatment is in favor of alloy with acceptable comprehensive properties.After aging at 190 ℃for 8h

the tensile strength of alloy wire reaches 224.3 MPa

and the conductivity reaches above 36.06 MS/m.