Effects of Heat Treatment on As-extruded Electromagnetic Continuous Casting AZ61 Magnesium Alloy Billets

Sui Li; Ren Zheng; Fang Canfeng; Wu Youfang; Zhang Xingguo

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Effects of Heat Treatment on As-extruded Electromagnetic Continuous Casting AZ61 Magnesium Alloy Billets
Vol. 30, Issue 6, Pages: 540-543(2010)
Published： 2010 ，
DOI：

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[1]隋里,任政,房灿峰,吴友芳,张兴国.热处理对挤压变形电磁连铸AZ61镁合金的影响[J].特种铸造及有色合金,2010,30(06):540-543+595.

Sui Li, Ren Zheng, Fang Canfeng, et al. Effects of Heat Treatment on As-extruded Electromagnetic Continuous Casting AZ61 Magnesium Alloy Billets. [J]. Special Casting & Nonferrous Alloys 30(6):540-543(2010)
[1]隋里,任政,房灿峰,吴友芳,张兴国.热处理对挤压变形电磁连铸AZ61镁合金的影响[J].特种铸造及有色合金,2010,30(06):540-543+595. DOI：

Sui Li, Ren Zheng, Fang Canfeng, et al. Effects of Heat Treatment on As-extruded Electromagnetic Continuous Casting AZ61 Magnesium Alloy Billets. [J]. Special Casting & Nonferrous Alloys 30(6):540-543(2010) DOI：

摘要

研究了固溶、时效对挤压变形电磁连铸AZ61镁合金组织性能的影响。结果表明

挤压可以显著细化AZ61镁合金电磁连铸铸锭组织

使铸锭性能得到大幅度提高。经过热挤压的AZ61（EMC）镁合金中几乎不存在β-Mg17Al12相

挤压锭固溶处理后的组织晶粒长大。时效处理后

合金中出现不连续析出和连续析出的β-Mg17Al12相

使得合金的抗拉强度和硬度得到了一定程度的提高

而伸长率略有降低。

Abstract

Effects of solid solution

ageing on microstructure and properties of as-extruded electromagnetic continuous casting AZ61 billets were investigated. The results show that properties of the electromagnetic continuous casting AZ61 magnesium alloy billets are greatly improved as a result of obvious refinement of grain size by extrusion. Absence of β-Mg17Al12 phase in as-extruded EMC AZ61 magnesium alloy can be observed. Grain size becomes coarse in the as-extruded ingot after solid solution. After ageing treatment

discontinuous and continuous precipitated β-Mg17Al12 phase appears in the alloy again

which results in the improvement of tensile strength and hardness to some extent and slight decrease of elongation.