Análisis de las combinaciones porcentuales del material de aporte de una junta a tope en un acero ASTM A588 Grado A utilizando los alambres tubulares E71T1 y E81T1NI2 para determinar las propiedades mecánicas en la fabricación de superestructura para puentes

Abstract

For the present research work, three types of percentage combinations of tubular wires were made in a butt joint steel ASTM A 588 Grade A. Afterwards, the test specimens were obtained to perform destructive test of traction, impact, double guidance and macrography in order to determine the mechanical properties. The analysis and interpretation of results helped to determine, the best combination of the filler material. Finally, a proposal of a WPS and PQR welding process is set up to combine 80% E71T1 - 20% E81T1NI2 along with CO2 as protection gas which has proved to be the combination with the best mechanical properties. This research project is based on the AWS D1.5 code, which contains the general provisions, design of connections, execution, techniques and qualification for the welding of bridges. The development of this project counted on the equipment of the laboratories and advice from civil engineering and mechanics faculty teachers of the Technical University of Ambato.