ANALYSIS OF THE WELDING ENERGY EFFECT BY THE SAW PROCESS ON ASTM A572 STEEL

Abstract

The use of welded profiles by the steel construction industry makes it possible to carry out the most varied projects in terms of engineering and architecture. Since the welded profile is a component from the union of metal sheets through the fusion welding process. Therefore, it is of paramount importance that the welding is able to provide a joint as specified by project. It is necessary to strictly control parameters such as weld penetration, material selection, welding position and used consumables. This work aimed to evaluate the influence of welding energy on mechanical strength through the microhardness profile and microstructure of A572 Gr50 steel weld joints using the submerged arc process. Where to evaluate the mechanical strength, the Vickers hardness profile of the weld joint was analyzed and optical microscopy techniques were used to evaluate the behavior of the microstructure of the steel. Relationships were observed between the grain size of the fusion region and the region affected by the weld with the welding energy, as well as the change in the steel hardness profile. Parameters such as penetration and weld geometry could also be related to the variation in welding energy.