| 摘要: |
| 详细分析了不锈钢等离子弧(PA)-钨极氩弧(GTA)双面弧焊(DSAW)的工艺特点,该工艺可以增加熔深,减小焊后热变形,尤其适用于中厚板的焊接。当小孔效应建立后,PA-GTA双面弧焊过程中的电弧均得到了不同程度的压缩,两焊枪之间的电弧电压出现下降趋势,节省了能源。形成小孔后,电弧穿过工件从工件内部进行加热,提高了热效率。表面张力、电弧吹力和电磁搅拌力均有利于获得较大的熔深,浮力有利于增加焊缝中间部位的宽度。 |
| 关键词: 双面弧焊 小孔 等离子弧 |
| DOI： |
| 分类号: |
| 基金项目:国防科技重点实验室基金资助项目(51471050103ZS6103);高等学校重点实验室访问学者基金资助项目 |
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| Technology characteristics of stainless steel plasma arc-gas tungsten arc double-sided arc welding process |
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DONG Hong-gang1, GAO Hong-ming2, WU Lin2, LIU Li-ming1
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1.Laboratory of Special Processing of Raw Material, Department of Materials Engineering, Dalian University of Technology, Dalian 116024, China;2.National Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China
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| Abstract: |
| This paper analyzes the technology characteristics of stainless steel plasma arc-gas tungsten arc double-sided arc welding process,which could increase penetration and reduce distortion,then this process is applicable to weld the thick plate.After the keyhole was established,the arcs during the double-sided arc welding are apparently constricted to some extent,and the arc voltage between the two welding torches descends,which can economize on energy.Because the arc heats the workpiece within the weld pool after penetrating,the arc thermal efficiency was improved.The surface tension,arc blow force and electromagnetic force work positive to improve the penetration,and the buoyancy can increase the width in the middle of weld pool. |
| Key words: double-sided arc welding keyhole plasma arc |
