Influence of Thermal Effect on Micro-hardness of Magnesium Alloy Weld of Vacuum Electron Beam Welding

被引：0

作者：

Luo Yi ^{[1
,2
]}

Xie Xiaojian ^{[1
,2
]}

Wan Rui ^{[1
,2
]}

Zhu Yang ^{[1
,2
]}

机构：

[1] Chongqing Univ Technol, Chongqing 400054, Peoples R China

[2] Chongqing Municipal Engn Res Ctr Inst Higher Educ, Chongqing 400054, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2017年 / 46卷 / 02期

关键词：

vacuum electron beam welding; thermal effect; magnesium alloy; micro-hardness; weld strengthening; EFFICIENCY; PARAMETERS;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The impact mechanisms of the thermal effect of vacuum electron beam welding on the micro-hardness of AZ91D and AZ31B magnesium alloy weld were studied. The results show that the welding thermal effect exerts its influence on weld hardness differently for AZ91D and AZ31B magnesium alloy. There are two factors affecting the micro-hardness of the weld, including the cooling rate after welding and the burning loss of alloying elements after the action of welding thermal effect. When the welding heat input is large, the main factor affecting the weld hardness of AZ91D magnesium alloy is the increase of strengthening phases because of the burning loss of Mg elements. A larger welding heat input induces more strengthening phases in weld and the weld hardness increases relatively. When the welding heat input is small, the main factor affecting the weld hardness of AZ31B magnesium alloy is the cooling rate after welding. The smaller welding heat input induces faster cooling and solidification rate after welding and then fine grains form, so the weld hardness is relatively high.

引用

页码：496 / 502

页数：7

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