Laser-MAG Hybrid Welding
Laser-MIG combined welding combines laser beam and MIG welding. The laser focuses the energy, while the MIG process forms the melt pool. This allows high speeds and large gap tolerances.
Physical-Chemical Mechanism of Action
Laser beam MIG hybrid welding combines the focusing of a high-intensity laser beam with the bridge-building of the MIG welding process. The laser focuses the energy on a small area, which increases the local melting rate and improves the gap tolerance. At the same time, the MIG process forms the weld pool through the spray arc and gas discharge.
Metallurgical Relevance & Risks in Welding
This combination enables high welding speeds and precise control of the fusion zone, which is especially helpful for delicate components. However, an inaccurate laser setting can lead to overheating or underheating, which can cause cracks or distortion. In addition, gas supply and spray current must be carefully regulated to ensure a homogeneous weld.
Workshop Practice & Instructions
To successfully perform laser beam MIG hybrid welding, the following parameters must be met:
• Laser power: 100 to 300 watts depending on material and thickness of the parts.
• Spray current: 250 to 400 amps for steel, depending on welding speed.
• Gas supply: Argon gas at a volume of 10 to 20 liters per minute.
• Welding speed: 30 to 60 cm/min for steel, depending on part geometry and material.