Scholarlink

<p>Galvanized steel has defects such as porosity and spatter during welding due to the presence of zinc coating. Currently, laser welding of galvanized steel mainly adopts plate gap to volatilize the zinc vapor. However, the zero-gap condition is desired for part component assemblies. The molten pool is the only way for zinc to escape in zero-gap condition. Oscillating laser has an inhibition effect on the defects. Consequently, it was applied to weld DP780 galvanized steel with zero-gap. The impact of various oscillation parameters on porosity and spatter was analyzed. The impact of various oscillation modes on defects primarily stems from their differing oscillation speeds. The experiment results showed that the spatter and porosity suppression under zig-zag oscillation was excellent, due to stabilized keyhole and slow solidification. The optimal parameters were 120 Hz and 1.2 mm, respectively. In addition, the solidification of the molten pool under the optimal oscillation parameter was 66.6% boost compared to that without oscillation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of oscillating laser on weld macroscopy and defects of galvanized steel welding with zero-gap

  • 期刊论文

  • 发表日期：

    2025年3月20日

查看全文
  • Bo Chen,
  • Han Gao,
  • Ziwen Jin,
  • Caiwang Tan,
  • Xiaoguo Song,
  • Yunxia Chen

摘要

Galvanized steel has defects such as porosity and spatter during welding due to the presence of zinc coating. Currently, laser welding of galvanized steel mainly adopts plate gap to volatilize the zinc vapor. However, the zero-gap condition is desired for part component assemblies. The molten pool is the only way for zinc to escape in zero-gap condition. Oscillating laser has an inhibition effect on the defects. Consequently, it was applied to weld DP780 galvanized steel with zero-gap. The impact of various oscillation parameters on porosity and spatter was analyzed. The impact of various oscillation modes on defects primarily stems from their differing oscillation speeds. The experiment results showed that the spatter and porosity suppression under zig-zag oscillation was excellent, due to stabilized keyhole and slow solidification. The optimal parameters were 120 Hz and 1.2 mm, respectively. In addition, the solidification of the molten pool under the optimal oscillation parameter was 66.6% boost compared to that without oscillation.