Laser welding is quickly becoming the preferred welding method in many industrial projects. However, while this technique offers numerous benefits over conventional welding, its performance depends heavily on the power characteristics of the laser beam.
Unfortunately, laser beam power can fluctuate over time, resulting in inconsistent and potential dangerous welds. This is where regular maintenance and expert calibration comes in.
The quality and magnitude of your laser’s power have the greatest effect on the quality of your weld. Low power output can fail to generate enough heat to effectively join the metals together, leading to weak fusion and the development of cold cracks.
However, one of the most crucial factors that can affect weld quality is the amount of power delivered to the workpiece per unit area of the beam, also known as power density.
High power densities (high concentrations of power over a small area) give lasers the unique ability to maximize penetration while minimizing heat to the surrounding material. This attribute reduces the heat-affected zone and part distortion.
On the other hand, too much power delivered over a large beam area can increase the heat-affected zone, which can affect the microstructure of the area surrounding the weld and promote fracture and even corrosion failure.