Laser welding

Laser welding or Laser beam welding (LBW) is characterized by the use of a laser to join metal parts. It is a fusion welding process, the heat generated by the laser performs the welding operation. The heat generated can cause oxidation at the weldment, so shielding gases like nitrogen, argon, carbon dioxide and helium are used to prevent it.

Usually, there is no need for a filler metal in laser welding, rather the molten metal joins by itself. Heat affected regions of laser welded parts are small, however, due to the nature of the laser, it can only be used to weld small parts. Laser welding is extensively used in the automotive industry where it is performed either by robots or manually.