Laser welding of stainless steel has become one of the most advanced technologies to achieve high-quality joints in industrial applications. The use of a single-mode laser coupled to a 20 µm fiber enables a very high power density at the focus, resulting in deep and stable penetration, even in highly reflective materials such as stainless steel.

To further improve weld quality, a wobbwelder head is used, introducing a controlled oscillatory movement into the beam. This oscillation –with adjustable amplitude and frequency parameters– allows the energy to be distributed more evenly in the weld zone. As a result, typical defects such as porosity, lack of fusion, or cracking are reduced, while producing a wider seam with better surface finish and higher tolerance to part misalignment.

In the attached image, a cross-section of a 2 mm thick specimen welded with 850 W of power at a speed of 15 mm/s is shown. The result demonstrates complete and uniform penetration, with a symmetrical weld profile and no visible porosity, confirming the efficiency of the process and the capability of wobble technology to produce high-quality joints in medium-thickness stainless steels.