| 2219铝合金FSW/VPPA交叉焊缝气孔缺陷 |
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| 引用本文： | 孙昭藩,蔡东红,杨旭东,林正,王松,黄木春. 2219铝合金FSW/VPPA交叉焊缝气孔缺陷[J]. 焊接学报, 2016, 37(10): 121-124 |
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| 作者姓名： | 孙昭藩 蔡东红 杨旭东 林正 王松 黄木春 |
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| 作者单位： | 1.重庆理工大学 材料科学与工程学院, 重庆 400054 |
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| 摘 要： | 2219铝合金在搅拌摩擦焊（FSW）后，进行变极性等离子弧焊（VPPA）十字交叉焊接，其交叉接头存在气孔缺陷.针对6 mm 2219铝合金进行FSW/VPPA交叉焊接试验，探究了交叉焊缝的气孔类型，分别对比不同FSW热输入量、不同的VPPA焊接速度对交叉焊缝气孔缺陷程度的影响.结果表明，FSW热输入量越大，交叉焊缝气孔缺陷程度呈下降趋势，这与FSW过程产生瞬时空腔有关；而VPPA焊速越大，交叉焊缝气孔缺陷程度呈上升趋势.因此，为了抑制FSW/VPPA交叉焊缝气孔的产生，可以对FSW过程进行惰性气体保护、适当地提高FSW热输入量以及降低VPPA焊接速度.
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| 关 键 词： | 搅拌摩擦焊 变极性等离子弧焊 交叉焊缝 气孔缺陷 |
| 收稿时间： | 2014-10-14 |
Porosity defects of 2219 aluminum alloy intersection weld by FSW and VPPAW |
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| SUN Zhaofan,CAI Donghong,YANG Xudong,LIN Zheng,WANG Song and HUANG Muchun. Porosity defects of 2219 aluminum alloy intersection weld by FSW and VPPAW[J]. Transactions of The China Welding Institution, 2016, 37(10): 121-124 |
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| Authors: | SUN Zhaofan CAI Donghong YANG Xudong LIN Zheng WANG Song HUANG Muchun |
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| Affiliation: | 1.College of Materials Science and Technology, Chongqing University of Technology, Chongqing 400054, China2.AMET Welding Automation Technology(Beijing) Co. Ltd., Beijing 102202, China3.Chongqing Institute of Optic and Machine, Chongqing 401123, China |
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| Abstract: | FSW-VPPA intersection weld on 2219 aluminum of 6 mm in thickness was perpendicularly conducted by friction stir welding (FSW) and variable polarity plasma arc (VPPA) welding and it is found that there are porosity defects in cross-connectors. Therefore, porosity defects of 2219 aluminum alloy intersection weld by FSW and VPPA were analyzed to determine the type of porosities. The effects of welding parameters such as FSW heat input and VPPA welding speed on the porosity defects were compared and analyzed. The results show that the degree of porosity defects of cross-weld joint decreases with the FSW heat input being increased, which is due to the transient cavity formed in the FSW process. However, the degree of porosity defects of cross-joint increases with VPPA welding speed being increased. In order to reduce the degree of porosity defects of cross-joint, some measures had been taken, such as insert gas shielding, increase of the FSW heat input and reduction of VPPA welding speed appropriately. |
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| Keywords: | FSW VPPA cross-weld joint porosity defect |
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