Optimización de las propiedades mecánicas a fractura para juntas soldadas a tope bajo proceso SMAW (AWS D1.1) utilizadas en la fabricación de estructuras metálicas en la compañía SEMADIJE LTDA

Abstract

The present development work is focused on the optimization of the mechanical properties to fracture for butt welded joints under SMAW process. For this purpose, a combination analysis of the most influential variables in the welding process was carried out and its mechanical properties were tested by tensile, crack propagation and impact tests. The base material used for this research was ASTM A572 grade 50 steel, with E-6010, E-6011 and E-7018 filler materials, using different percentages of the latter for each combination. Regarding the welded joints, the SMAW welding process was used, which complies with the requirements of the AWS D1.1 code, and which is widely used in the manufacture of metallic structures. From the aforementioned tests, evaluations were obtained, which allow to statistically analyze each one of them, which allows to obtain the optimum combination with respect to their resistance to fracture, both individually and globally. After the respective analyses, it can be seen that the combination that presents an improvement in the mechanical properties to fracture is the one that corresponds to the use of the E-7018 electrode with a type of X-shaped joint.