Analysis of Porosity Characteristics in Weld Metal of High Strength Aluminum Alloy and the Effect of Mixed Shielding Gas

机译：高强度铝合金焊接金属的气孔特性分析及混合保护气的影响

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Aluminum alloy has being widely used in modern automobile and aeronautic industry. However, the welding of aluminum alloy, especially high strength aluminum alloy, is difficult. Porosities are usually brought in the weld metal. In this paper, MIG welding using mixed gas shielding is carried out. The characteristic shapes of porosity in weld metal are described, the mechanism of porosity formation is analyzed, and the factors that influence the tendency of porosity formation are studied. Experiment results indicate that by the use of mixed shielding gas of 38%He+62%Ar, the number of porosity is reduced, the width of HAZ and softened zone is decreased, and the mechanical properties of welded joint is increased.

机译：铝合金已被广泛用于现代汽车和航空工业。然而，铝合金，特别是高强度铝合金的焊接是困难的。气孔通常会进入焊接金属。本文采用混合气体保护焊进行了MIG焊接。描述了焊接金属中孔隙的特征形状，分析了孔隙形成的机理，并研究了影响孔隙形成趋势的因素。实验结果表明，采用38％He + 62％Ar混合保护气，可减少气孔数量，减小热影响区宽度和软化区，提高焊接接头的力学性能。

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来源
《Pacific Rim International Conference on Advanced Materials and Processing(PRICM 5) pt.1; 20041102-05; Beijing(CN)》|2004年|P.309-312|共4页
会议地点 Beijing(CN)
作者
ZHANG Xiaomu; ZHANG Zhiyong; PENG Yun; TIAN Zhiling; HE Changhong; XIAO Hongjun; MA Chengyong;
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作者单位

Central Iron Steel Research Institute, Beijing 100081, China;

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原文格式 PDF
正文语种 eng
中图分类工程材料一般性问题;
关键词
aluminum alloy; welding; porosity; mixed gas shielding; mechanical properties;

机译：铝合金;焊接;孔隙率;混合气体保护层;力学性能;

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Analysis of Porosity Characteristics in Weld Metal of High Strength Aluminum Alloy and the Effect of Mixed Shielding Gas

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