The effect of tilting angle on penetration depth and profile in laser welding and in submerged arc welding

Abstract

There are many factors on which the penetration depth in Submerged Arc Welding and laser welding depends upon. Tilting angle of incidence is one of the important factors on which the penetration depth depends on. There are two ways of doing welding: one is at pull angle and another is at push angle. Penetration depth largely depends on these pull and push angle. Penetration depth will not be same for pull and push angle even if the angle of incidence is same.

This thesis studies the effect of tilting angle on penetration depth in submerged arc welding and laser welding. The material used for the welding is 500 ML of thickness 24 mm. The experiment is done in two parts with two sets of parameters: first being submerged arc welding with the angle of incidence of 0°, 10° and 20° keeping all other parameters fixed. Similarly, laser welding is done with the angle of incidence of 0°, 10°, 15° and 20° and again with all other parameter fixed. After the experiment, the parts were taken through number of post processing steps like sawing, grinding, polishing, etching before taking the microstructure picture for measuring the penetration depth. The results from the experiment verifies the finding from the literature review that the penetration depth on SAW (push angle) and laser welding (pull angle) is maximum at 0° and it keeps on decreasing as the angle of incidence keeps on increasing.