摘要
探讨氦-氩混合气体保护下TIG焊接AZ31镁合金板的可焊性,对其焊接工艺参数进行确定。试验结果表明,与采用纯氩、纯氦气保护焊接相比,采用氦-氩气混合气体TIG焊接镁合金板材具有电弧稳定,阴极清理作用明显,氧化膜易于破碎,保护效果良好等优点。在合理的工艺参数下,可获得表面光滑、无堆高和无变形等缺陷的焊缝。
The weldability of AZ31 magnesium plate by He-Ar mixed gas TIG welding was investigated. The welding process parameters for AZ31 plate with a 3 mm thickness were optimized. The experimental resuhs have been shown that the cathode has evidently function of surface clearing, the oxidation film is easily to be broken and the fused pool ,nixes well when He-Ar ,nixed gas protective atmosphere was used in TIG welding. A satisfied weld appearance was obtained under the optiroized process parameters. The surface of observed joint is smooth free from heap high and appearance defects.
出处
《轻合金加工技术》
CAS
北大核心
2007年第8期45-47,共3页
Light Alloy Fabrication Technology
关键词
镁合金
焊接
氦-氩混合气体
magnesium alloy
welding
TIG
He-Ar mixed gas
