Evaluación de las propiedades mecánicas y caracterización metalográfica de juntas soldadas a tope de acero ASTM A36, con material de aporte ER70 S-6 bajo proceso GMAW

Abstract

The objective of this work was to evaluate the mechanical properties and carry out the metallographic characterization of the butt-welded joints of ASTM A36 Steel, with ER70S-6 filler material under the GMAW process, it was developed from a quantitative point of view attached to a correlational and experimental approach, through data collection techniques and subsequent content analysis, the initial parameters to be taken into account in the welding process were established, based on the AWS Dl.l standard, with the development of the experimental process the properties were evaluated and the welded joints were characterized. The development of the aforementioned allowed analyzing three thicknesses of plates, which were welded with a variation of parameters between them, originating four combinations of parameters for each thickness, in each of these combinations tensile, face bending, and face bending tests were carried out root; and, subsequently, the metallography of three zones was carried out: fusion zone, zone affected by heat and base metal, the width of the zone affected by heat and the grain size were determined. Based on the above information, it was possible to identify those five combinations had good mechanical properties expressed in a correct weldability of the bead, and can be replicated with the information generated. It is recommended to analyze in detail the fusion zones and zone affected by heat to determine the structural changes produced in its entire length.