Gustavo Megale

Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte, Brazil

FCAW X CWG PROCESS

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Biography

Student of Mechanical Engineering at the Pontifical Catholic University of Minas Gerais, with emphasis on Mechatronics Engineering. My father is also a mechanical engineer, so I've been in contact with the area and I've liked it since I was a child. I studied high school in Lima, Peru. I have a lot of experience with multiple cultures, and today I'm currently doing an exchange in Germany. I worked as an intern at the Companhia Brasileira de Trens Urbanos (CBTU) where I could apply and see all the theory studied at the university. I hope to graduate and work in the field of mechatronics or aviation, as it is the area that I have loved the most since high school.

Abstract

This presentation explores the technical characteristics of welding processes and analyzes the structure of the welded joint (base metal, heat-affected zone, and weld metal) in terms of structure, mechanical properties, and penetration profile, using samples welded by the flux-cored arc welding (FCAW) and cold wire gas (CWG) processes. The evaluation of the system (welded joint) is based on the best weldability from tensile tests, analysis of the bead penetration profile, deposition rate, and heat added to the process. Welded joint performance comparisons are made using ABNT 1020 carbon steel with E-71T1 and E-70S6 wires, respectively. The specimens were welded in a flat position and chamfered, using different gas mixtures in both the FCAW and CWG processes. As a result, no discontinuity was observed in the welded joints, and the values of the mechanical properties tested did not indicate material embrittlement. Therefore, the values presented in the penetration profile and deposition rate were higher for the CWG process. The heat input in the welded joint was also lower for the CWG process, demonstrating a better performance for the process.

Co-authors: Caio César Melo de Sousa Miranda, Gustavo de Pádua Megale, Deborah Santos, Pedro Américo de Almeida Magalhâes Júnior, Leonel Dimas de Abreu.

Keywords

CWG; FCAW; structural analysis; welded structure; MIG/MAG; Welding