In order to minimize the problems with the porosity of the material due to welding, it is necessary to control the speed of the process, thermal gradient, dynamics of melt pool flow and solidification. Therefore, in order to solve this problem, we use laser beam welding.
In the hybrid laser welding process, the speed parameters in the fusion zone can be controlled. At low speed in the molten pool area, there is a lot of dissolved hydrogen and it has the potential to create pores in the weld joint. Conversely, as we increase the speed there is very little hydrogen solubility. The appropriate welding speed is an important parameter that affects the reduction of dissolved hydrogen in the weld pool area, thereby reducing the porosity of the joint. In addition, the laser allows control of the thermal gradient, dynamics of melt pool flow and solidification. It can steer the melt pool and eject the hydrogen bubbles from material leading to high quality welding.