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首页> 外文期刊>Journal of Manufacturing Processes >Microstructure and porosity characteristics of 5A06 aluminum alloy joints using laser-MIG hybrid welding
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Microstructure and porosity characteristics of 5A06 aluminum alloy joints using laser-MIG hybrid welding

机译：激光-MIG混合焊接5A06铝合金接头的组织和孔隙率特性

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摘要

5A06 aluminum alloy plates with thickness of 6.9mm are welded by KUKA Robot with a fiber laser of IPG YLS6000. The laser-metal inert gas (MIG) hybrid welding method is adopted to provide high overall productivity in this paper. To investigate the joints microstructure and porosity distribution, optical microscope observation, scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) detection are conducted. The pores of laser-MIG hybrid welding joint are mainly metallurgical pores which are caused by the dissolved gases and evaporation of Mg element. This metallurgical pores are densely populated in the upper area of weld joint. Besides, the micro-hardness along the weld center line and perpendicular to the weld center line are separately analyzed. The joint softening can be evidently observed near heat affected zone (HAZ) and in weld bead (WB), where the grain enlargement or pores problem exist. It claims that the formation of pores has a much greater influence on the joint softening than grain enlargement. In order to get a low-porosity weld joint, as well as owning a high level of micro-hardness, the porosity and micro-hardness in different laser-MIG hybrid weld joints are analyzed comprehensively. The welding speed of 3m/min is more suitable to be applied in laser-MIG hybrid welding for the 6.9mm 5A06 aluminum alloy.
机译：KUKA Robot用IPG YLS6000光纤激光器焊接了厚度为6.9mm的5A06铝合金板。本文采用激光-金属惰性气体（MIG）混合焊接方法，以提高整体生产率。为了研究接头的微观结构和孔隙分布，进行了光学显微镜观察，扫描电子显微镜（SEM）和能量色散光谱仪（EDS）检测。激光-MIG混合焊接接头的气孔主要是冶金气孔，是由溶解气体和Mg元素的蒸发引起的。该冶金孔在焊接接头的上部区域密集地填充。此外，还分别分析了沿焊缝中心线和垂直于焊缝中心线的显微硬度。在热影响区（HAZ）附近和焊缝（WB）中明显地观察到接头软化，在焊缝中存在晶粒增大或孔隙问题。它声称孔的形成对接缝软化的影响比晶粒扩大大得多。为了获得低孔隙率的焊接接头并具有较高的显微硬度，对不同的激光-MIG混合焊接接头的孔隙率和显微硬度进行了综合分析。 3m / min的焊接速度更适合用于6.9mm 5A06铝合金的激光-MIG混合焊接。

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  • 来源
    《Journal of Manufacturing Processes》 |2018年第10期|437-445|共9页
  • 作者

    Zhan Xiaohong; Zhao Yanqiu; Liu Zemin; Gao Qiyu; Bu Hengchang;

  • 作者单位

    Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 211106, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 211106, Jiangsu, Peoples R China;

    Shanghai Inst Space Prop, Shanghai 200000, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Sci, Nanjing 211106, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 211106, Jiangsu, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Aluminum alloy; Microstructure; Pores formation; Laser-MIG hybrid welding;

    机译：铝合金;显微组织;孔形成;Laser-MIG混合焊接;

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