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Effects of relative positioning of energy sources on weld integrity for hybrid laser arc welding

机译：混合激光弧焊中能量相对位置对焊缝完整性的影响

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摘要

This study is concerned with the effects of laser and arc arrangement on weld integrity for the hybrid laser arc welding processes. Experiments were conducted for a high-strength steel using a 4 kW Nd: YAG laser and a metal active gas (MAG) welding facility under two configurations of arc-laser hybrid welding (ALHW) and laser-arc hybrid welding (LAHW). Metallographic analysis and mechanical testing were performed to evaluate the weld integrity in terms of weld bead geometry, microstructure and mechanical properties. The morphology of the weld bead cross-section was studied and the typical macrostructure of the weld beads appeared to be cone-shaped and cocktail cup-shaped under ALHW and LAHW configurations, respectively. The weld integrity attributes of microstructure, phase constituents and microhardness were analyzed for different weld regions. The tensile and impact tests were performed and fracture surface morphology was analyzed by scanning electron microscope. The study showed that ALHW produced joints with a better weld shape and a more uniform microstructure of lath martensite, while LAHW weld had a heterogeneous structure of lath martensite and austenite. (C) 2016 Elsevier Ltd. All rights reserved.
机译：这项研究涉及混合激光电弧焊工艺中激光和电弧布置对焊缝完整性的影响。使用4 kW Nd：YAG激光和金属活性气体（MAG）焊接设备对高强度钢进行了实验，该设备采用电弧激光混合焊接（ALHW）和激光电弧混合焊接（LAHW）两种配置。进行了金相分析和机械测试，以评估焊缝几何形状，微结构和机械性能的焊接完整性。研究了焊缝横截面的形态，在ALHW和LAHW配置下，焊缝的典型宏观结构分别为锥形和鸡尾酒杯形。分析了不同焊接区域的显微组织，相组成和显微硬度的焊接完整性属性。进行拉伸和冲击测试，并通过扫描电子显微镜分析断裂表面形态。研究表明，ALHW焊缝具有更好的板条马氏体组织和更均匀的显微组织，而LAHW焊缝具有板条马氏体和奥氏体的异质结构。 （C）2016 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Optics and Lasers in Engineering》 |2016年第6期|87-96|共10页
  • 作者

    Liu Shuangyu; Li Yanqing; Liu Fengde; Zhang Hong; Ding Hongtao;

  • 作者单位

    Changchun Univ Sci & Technol, Coll Mech & Elect Engn, 7089 Weixing Rd, Changchun 130022, Peoples R China;

    Changchun Univ Sci & Technol, Coll Mech & Elect Engn, 7089 Weixing Rd, Changchun 130022, Peoples R China;

    Changchun Univ Sci & Technol, Coll Mech & Elect Engn, 7089 Weixing Rd, Changchun 130022, Peoples R China;

    Changchun Univ Sci & Technol, Coll Mech & Elect Engn, 7089 Weixing Rd, Changchun 130022, Peoples R China;

    Univ Iowa, Dept Mech & Ind Engn, Iowa City, IA 52242 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Hybrid laser arc welding; Weld integrity; Microstructure; Mechanical properties; High-strength steel;

    机译：混合激光电弧焊;焊接完整性;组织;力学性能;高强度钢;

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