The welding process is influenced by the plasma produced by laser irradiation. Plasma plume above the keyhole is the bright, often bluish, flash frequently seen during laser welding.

• 激光焊接中,光致等离子体的产生,尤其是小孔外闪烁的明亮蓝色等离子体云,影响着激光焊接过程的进行。