Laser Direct Brazing
Laser soldering is a thermal joining process where a laser beam melts a filler metal without melting the base material. It produces dense and strong joints through localized heating and precise automation.
Physicochemical Mechanism of Action
A high-energy laser beam melts the filler material at the joint interface. The base material remains unchanged because its temperature does not exceed its melting point. This results in a fine, dense bond between the materials.
Metallurgical Relevance & Risks in Welding
Direct laser soldering prevents porosity and improves the mechanical properties of the joint. However, it also reduces the ductility of the material, which can lead to localized stresses if the energy settings are too high. Inaccurate control of the laser parameters can lead to incomplete or excessive melting, resulting in joint defects.
Workshop Practice & Procedural Instructions
Use a laser welding machine with precise energy control. Ensure the filler material is correctly positioned and the laser beam is aimed at the joint interface. Energy settings depend on the material and the desired joint properties. A setting of 10-20 J/cm² for many metals provides a good starting point, but always check the specific requirements of the material.