Paper on comparisons of laser spot welding with manual arc welding for 304 stainless steel.

Now days, welding technology become high in demand due to industrial and domestic development. There has been constant improvement in the welding technology. The arc welding plays an important role in a process of fusion welding. It was more flexible and routinely has been used for many decades. Recent development is laser welding. It is highly utilized in manufacturing industry because of its special features. Recently, everywhere the automatic welding processes most preferable for achieving the high rate of production. Higher efficiency and low cost strategies is primary requirement in case of joining the metal. In the present study, we aim to compare the arc welding and laser welding. The stress-strain curves of the reference and welded specimen is depicted in the Figure 3. As strain increased up to 1.6-1.9%, the stress also showed an increased trend in the both the welding. The stress gets stabilized further upon increased in the percent strain up to 6. Laser welded specimen showed maximum stress tolerance values than arc welded specimen. Laser welds and arc weld showed a hardness of about 354 HV and 237 HV, respectively. The study can be concluded as the laser welding is superior than manual arc welding. The laser welding showed maximum hardness, stress tolerance and strain sustainability than the arc welding. [ABSTRACT FROM AUTHOR]