Hybrid laser welding is a process in which laser welding and any other welding process are combined into a single process. Another welding process can be a process such as MAG welding. The combination of laser process and the arc process results in an increase in both weld penetration depth and welding speed. The metal vapour escaping from the vapour cavity acts upon the arc plasma. Absorption of the laser radiation in the processing plasma remains negligible. Depending on the ratio of the two power inputs, the character of the overall process may be mainly determined either by the laser or by the arc.
Laser beams and arcs are different welding heat sources but both work in gaseous shielding atmosphere at a suitable pressure to make it possible to combine these heat sources to a unique welding technique called as hybrid laser-arc welding. This process is being highly used in welding applications for last few years. In this process, we can observe most of the mechanisms of self-generated laser welding and arc welding. Also, we can see some combined effects generating from the combination of two different processes.
Hybrid process is not just a simple combination of laser beam and arc, but there are complicated physical interactions between the two heat sources.
In hybrid laser welding processes, the laser beam source serves as the primary heat source as it is a high-energy density heat source and enables deep penetration welding. CNC (Computer Numerical control) laser welding machine is used many of the times for this process. Computer Numeric Control is used to control the machine through a predefined set of commands.
The arc serves as a secondary heat source, which gives stability to the process, improves reliability and efficiency and the weld quality. The arc process can be a process with a non-consumable electrode or with the consumable electrode. The process with a consumable electrode is applied when the filler material is needed to be added otherwise process with the non-consumable electrode is applied.
There are many benefits of hybrid laser welding process. Let’s see few of them.
So, why not to go for the hybrid laser welding process by leaving behind the traditional welding processes.