Microstructure and Properties of Magnesium Alloy Scraps Before and After Purification Treatment by Degassing

Xu Sixiang1; Wu Shusen2; Gao Peiqing1

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Microstructure and Properties of Magnesium Alloy Scraps Before and After Purification Treatment by Degassing
Issue 1, Pages: 54-56(2008)
Published： 2008 ，
DOI：

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[1]许四祥,吴树森,高培青.镁合金废料除气净化前后组织与性能的研究[J].特种铸造及有色合金,2008(01):54-56+2+1.

Xu Sixiang1, Wu Shusen2, Gao Peiqing1. Microstructure and Properties of Magnesium Alloy Scraps Before and After Purification Treatment by Degassing. [J]. Special Casting & Nonferrous Alloys (1):54-56(2008)
[1]许四祥,吴树森,高培青.镁合金废料除气净化前后组织与性能的研究[J].特种铸造及有色合金,2008(01):54-56+2+1. DOI：

Xu Sixiang1, Wu Shusen2, Gao Peiqing1. Microstructure and Properties of Magnesium Alloy Scraps Before and After Purification Treatment by Degassing. [J]. Special Casting & Nonferrous Alloys (1):54-56(2008) DOI：

摘要

利用镁液定量测氢方法和定量金相技术

研究了镁合金废料氩气除气净化前后的含氢量变化及含氢量对气孔形貌及力学性能的影响。结果表明

镁合金废料氩气除气净化后去氢率为40%。镁合金废料在氩气除气后气孔明显减少

但仍然达不到同等条件下镁合金原锭的水平。通过对比除气前后的密度发现

除气后试样的密度得到了较大的提高。与除气前相比

镁合金废料除气后铸件力学性能也得到很大的提高

抗拉强度提高了19%

伸长率提高了63%。

Abstract

The variation of hydrogen content in magnesium alloy scraps before and after purification treatment by Ar2 degassing and effects of hydrogen content on microstructure and mechanical properties of the alloy have been examined by self-developed quantitative hydrogen-measuring equipment for liquid magnesium and quantitative metallographic method.The results indicate that the hydrogen content in the magnesium alloy scraps can be decreased by 40% with Ar2 purification.Although the micro-porosity in the degassed scraps is reduced greatly

it is higher than that in magnesium alloy ingot at the same conditions.In addition

the density of degassed alloy is obviously improved

and the tensile strength and elongation are increased by 19% and by 63%

respectively

compared with the alloy scraps before degassing treatment.