• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Congress on Applications of Lasers and Electro-Optics >THE IMPACT OF ZINC-COATING ON LASER HYBRID WELDING OF STEEL
【24h】

THE IMPACT OF ZINC-COATING ON LASER HYBRID WELDING OF STEEL

机译：锌涂层对钢激光混合焊的影响

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Hybrid Nd:YAG/MAG welding of ultra high strength steel is studied for 1.5 mm thick sheets in I-, T- and overlap joint type configuration. Untreated and zinc-coated steels were compared, causing distinct differences in terms of process stability and welding result. For zinc coating it can be distinguished between domains of trapped zinc layers like in overlap and T-joints and free surface zinc coatings. While the former situation is critical for violent evaporation and in turn spatter in the absence of a gap, in the latter case a zinc domain outside the weld pool area evaporates due to its low boiling point, thus not disturbing the laser welding process. However, during hybrid welding arc instabilities and short circuiting were observed when changing to zinc coated steel, even for butt joints. One hypothesis is an impact of the zinc vapour atoms on the plasma, with an ionisation energy 20% higher than iron, but 40% lower than Ar. The influence was calculated by Saha's equation. The process window is much narrower than for uncoated steel. Moreover, an enhanced generation of spatter and fume can be observed. A theory for the impact of zinc-coating on hybrid welding is postulated.
机译：Hybrid Nd：超高强度钢的YAG / MAG焊接在I型，T-和重叠接头型配置中研究了1.5毫米厚的床单。比较未经处理的锌涂层钢，造成过程稳定性和焊接结果的不同差异。对于锌涂层，可以在捕获的锌层的畴之间区分开，如重叠和T关节和自由表面锌涂层。虽然前者的情况对于剧烈蒸发并且在没有间隙的情况下，在后面的情况下，在后一种情况下，焊接池区域外的锌结构域由于其低沸点而蒸发，因此不会扰乱激光焊接过程。然而，在混合焊接期间，在改变到镀锌钢时，甚至用于对接接头时，观察到在混合焊接弧形不稳定和短路中。一个假设是锌蒸气原子对等离子体的影响，电离能量高于铁，但比Ar低40％。影响由萨哈的等式计算。过程窗口比未涂层钢更窄。此外，可以观察到增强的飞溅和烟雾。假设锌涂层对混合焊接的影响理论。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号