镁合金减震塔的真空压铸研究

林凌; 曾小勤; 丁文江

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镁合金减震塔的真空压铸研究
Production of Magnesium Alloy Shock Absorption Tower by Vacuum Die Casting
2010年30卷第3期页码：240-243
纸质出版日期： 2010 ，
DOI：

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[1]林凌,曾小勤,丁文江.镁合金减震塔的真空压铸研究[J].特种铸造及有色合金,2010,30(03):240-243+192-193.

Lin Ling, Zeng Xiaoqin, Ding Wenjiang. Production of Magnesium Alloy Shock Absorption Tower by Vacuum Die Casting[J]. Special Casting & Nonferrous Alloys, 2010,30(3):240-243.
[1]林凌,曾小勤,丁文江.镁合金减震塔的真空压铸研究[J].特种铸造及有色合金,2010,30(03):240-243+192-193. DOI：

Lin Ling, Zeng Xiaoqin, Ding Wenjiang. Production of Magnesium Alloy Shock Absorption Tower by Vacuum Die Casting[J]. Special Casting & Nonferrous Alloys, 2010,30(3):240-243. DOI：

摘要

研究并对比了真空压铸生产的AZ91D和AM60合金减震塔铸件的微观组织、力学性能

考察了热处理工艺对其性能的影响。结果表明

AZ91D和AM60真空压铸件组织均由基体α-Mg和Mg17Al12相组成

固溶处理后Mg17Al12相消失

时效处理后其以非连续相形式析出。AZ91D和AM60铸件均能够热处理强化

但是AM60合金的强化效果弱于AZ91D合金。另外

真空压铸能有效消除铸件中的气孔

但无法完全消除缩松现象

不过仍可通过热处理提高真空压铸件的力学性能。

Abstract

Microstructure and mechanical properties of AZ91D shock absorption tower and AM60 shock absorption tower produced by vacuum die casting were analyzed comparatively

and effects of heat treatment were examined.Microstructures of both AZ91D and AM60 magnesium alloy parts are composed of α-Mg matrix and β-Mg17Al12 phase

in which β-Mg17Al12 phase disappears after solid solution and it is precipitated as discontinuous phase after aging treatment.Although both AZ91D and AM60 alloy parts can be strengthened by heat treatment

strengthening effect on AZ91D alloy parts are superior to that on AM60 alloy parts.In addition

gas hole in the parts can be effectively eliminated

however

shrinkage defects can not completely eliminated by vacuum die casting.Mechanical properties of the vacuum die casting parts can be greatly improved after heat treatment.