| 填充热丝激光窄间隙焊接的实验研究 |
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| 引用本文： | 温鹏,郑世卿,荻崎贤二,山本元道.填充热丝激光窄间隙焊接的实验研究[J].中国激光,2011(11). |
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| 作者姓名： | 温鹏 郑世卿 荻崎贤二 山本元道 |
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| 作者单位： | 清华大学机械工程系;先进成形制造教育部重点实验室;广岛大学机械系统工程系; |
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| 基金项目： | 国家自然科学基金(51005125)资助课题 |
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| 摘 要： | 将填充热丝应用到高光束质量、长焦距的光纤激光窄间隙焊接中,不锈钢母材通过激光加热,镍基焊丝通过电流加热,有效利用复合热源的优势,提高了焊丝过渡稳定性和熔覆效率。通过高速摄像机对送丝过程进行在线观察,分析工艺参数对焊丝过渡的影响。研究不锈钢和镍基合金异种金属窄间隙焊接接头的凝固组织,并对焊缝金属进行元素分布扫描。研究发现,由焊丝电流和送丝速度等工艺参数决定的送丝稳定性是影响填充热丝激光焊接质量的最主要因素。对于窄间隙焊接,采用与间隙宽度相当的离焦光斑激光热导焊,可形成较好的侧壁熔合,由熔融金属曲面和侧壁构成的激光反射是侧壁熔合的主要原因。焊缝冷却速度较快,焊缝金属的凝固组织呈明显的对生生长,在坡口侧壁附近其生长方向与侧壁近似垂直,焊缝不存在宏观偏析。在间隙底部直角处容易出现未熔合现象,采用底部圆弧过渡的U型坡口后,可较好地解决底部未熔合问题,获得了无宏观缺陷的焊接接头。
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| 关 键 词： | 激光技术 激光焊接 热丝 高速摄像 窄间隙焊接 |
Experimental Research on Laser Narrow Gap Welding with Filling Hot Wire |
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| Wen Peng, Zheng Shiqing Shinozaki Kenji Yamamoto Motomichi.Experimental Research on Laser Narrow Gap Welding with Filling Hot Wire[J].Chinese Journal of Lasers,2011(11). |
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| Authors: | Wen Peng Zheng Shiqing Shinozaki Kenji Yamamoto Motomichi |
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| Affiliation: | Wen Peng1,2 Zheng Shiqing1 Shinozaki Kenji3 Yamamoto Motomichi3 1Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China 2Key Laboratory of Advanced Materials Processing Technology,Ministry of Education,China 3Department of Mechanical System Engineering,Hiroshima University,Hiroshima,739-8527,Japan |
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| Abstract: | Hot wire is used as the filler metal of high beam quality and long focal distance fiber laser for narrow gap welding.The austenite stainless steel base metal is molten by laser,and the Ni-based alloy wire is heated up by wire current.Both the stability and efficiency are improved a lot by using the hybrid heating sources.High speed camera is used to observe the movement of filler wire during laser welding and analyze the effect of welding parameters on wire transition.The solidification microstructure and t... |
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| Keywords: | laser technique laser welding hot wire high speed imaging narrow gap welding |
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