Laser welding is especially suitable for small, thin parts that do not require any filler material. The beam heats up the edges of a typical argon in oxidative protection. Cutting, carving and processing are also done with lasers.
The advantages are extremely high beam focal length accuracy, and very high temperature can easily melt tungsten card, can even carve diamond.
The downside is capital equipment and operating costs (expensive argon and carbon dioxide gas), floor space for machines, and it is a hot process (unlike, for example). A cold resistance welding.
