Laser Metal Deposition
Laser cladding with powder melts metal powder with a laser beam and forms a solid weld. It is suitable for repairing components and applying functional layers.
Physico-Chemical Mechanism
A laser beam is focused on metal powder, which melts and bonds with the surrounding material. The heat is so concentrated that it brings the powder particles into a solid bonding state.
Metallurgical Relevance & Welding Risks
This process allows for high accuracy and minimal distortion during repair. It also reduces stresses in the material, which decreases the occurrence of cracks. However, inaccurate focusing of the laser can lead to uneven melting, which in turn causes porosity and weak spots in the weld.
Workshop Practice & Instructions
Use a laser with an energy of at least 200 W for most metals. Keep the powder stream focused on the weld area and move it slowly across the surface. The speed should be between 10 and 50 mm/s, depending on material thickness and repair depth. Make sure the laser beam is always perpendicular to the surface to ensure even melting.