• Preheating of the material is usually not necessary: ??With laser welding, energy is very selectively introduced into the workpiece, which significantly reduces the heat impact.
• Significantly low thermal distortion
• high mechanical strength of the weld seam
• The material deposition can be flexibly influenced and controlled by the choice of the welding wire

With laser welding, light is focused on a 0.2 to 2 mm small spot via the focusing optics. The energy input at the focal spot is very high, which causes the material surface to melt quickly. Depending on the welding requirements, the joint can be made with or without different filler metals (wire). At the same time, the weld seams are cooled again at high speed due to the temperature difference in the workpiece. As a result, the thermal distortion of the material is very low.

When welding in CW mode, a continuous melt is the result. When welding in pulsed mode the melt cools during the pulse pauses, which results in a lower welding depth, less distortion on thin components and a lower energy input into the material.

CW laser welding or “CW deep welding”, on the other hand, achieves large welding depths through high energy densities (high average power with a small focus diameter). The “CW thermal conduction welding” process is also used for build-up and joint welding of crack-prone base materials, which enables a very homogeneous weld metal without micro-cracks, depending on the joined material.