What Is Laser Hybrid Welding?

There is such a welding technique. It can reduce heat input by 80% to 90%, increase production efficiency by 3 to 10 times, and reduce production costs by 50% to 80%. It is a new welding technology – laser hybrid welding.

 

►Laser Hybrid Welding

What is the working principle of laser hybrid welding? Let’s take a look with LaserDelta, let’s first understand how it works.

Laser hybrid welding, in addition to the energy input from the arc to the welding zone, the laser also inputs heat to the weld metal. The laser hybrid welding technology is not that two welding methods act sequentially, but two welding methods act on the welding area at the same time. The laser and arc give full play to their respective advantages to form a new high-efficiency welding heat source. During laser hybrid welding, volatilization occurs not only on the surface of the workpiece, but also on the filler wire, so that more metal volatilizes, which makes the energy transmission of the laser easier and ensures the integrity of the welding process.

►Advantages and characteristics of hybrid welding
1. The welding surface is smooth and flat, no blackening and yellowing, no cracks, and good sealing;
2. Compared with traditional welding, the composite welding speed can be increased by 2-3 times;
3. Using composite welding, the processing power used for continuous welding of single-beam optical fiber is significantly reduced by about 30%;
4. The yield rate of composite welding is significantly improved;
5. Pay attention to the use of shielding gas during welding;
6. If there are impurities in the shell, it is easy to cause explosive spots, which can be repaired;
7. Compared with single optical fiber welding, the fault tolerance of composite welding to welding track is significantly improved.

 

Laser hybrid welding is characterized by low power source cost, good weld bridging, good arc stability, and easy improvement of weld structure by filler metal. Laser beam welding is characterized by deep penetration, high welding speed, low heat input, and narrow weld bead, but welding thicker materials requires more powerful welding lasers. However, the molten pool of laser hybrid welding is small, and the workpiece deformation is small during the welding process, which greatly reduces the work of correcting welding deformation after welding. Laser hybrid welding will produce two independent molten pools, and the heat input by the subsequent arc also plays the role of post-weld tempering treatment to reduce the hardness of the weld. Since the welding speed of laser hybrid welding is very fast, it can reduce production time and production cost.

In short, laser hybrid welding has multiple advantages such as smaller deformation than laser welding and welding, large arc welding penetration, good weld shape, fast welding speed, small heat input, and small loss of welding strength. It is used in aerospace, rail transit, ships, Construction, automobile, energy and other fields have good development prospects.

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