Process Gas Flow Dynamics
The laminar flow of the shielding gas over the powder bed for rapid evacuation of fumes and spatter. It prevents attenuation of the laser beam.
Physical-Chemical Mechanism of Action
The shielding gas flows in straight lines over the powder bed, allowing efficient removal of fume and spatter. This prevents these substances from attenuating the laser beam or affecting its intensity.
Metallurgical Relevance & Welding Risks
Insufficient shielding gas flow can cause fume and spatter to not be adequately removed from the powder bed. This can attenuate the laser beam, leading to inaccurate weld bead profiles or even failures. Optimal flow ensures the laser beam operates stronger and more precisely.
Workshop Practice & Action Instructions
Ensure the shielding gas flows in laminar flow across the powder bed. This can be achieved through proper setup of the gas supply system and adjusting the airflow. Continuously monitor gas flow and adjust as needed to ensure optimal weld quality.