THE INFLUENCE OF ELECTRIC VOLTAGE ON THE QUALITY OF SUBMERGED ARC WELDING IN THIN PLATES

• DOI: 10.22533/at.ed.3172212216091

• Palavras-chave: Submerged Arc, Thin Sheets, Weld Quality, Magnetic Particle.

• Keywords: Submerged Arc, Thin Sheets, Weld Quality, Magnetic Particle.

• Abstract:

  This work consists of the analysis of the quality of the weld between thin sheets, carried out by the submerged arc welding process, with the use of different electrical parameters, in order to observe the influence of these parameters during the process, which is used on a large scale in manufacture and maintenance of parts, equipment and structures. For this, welds were made in 6 mm thin sheets using five different pre-established electric current ranges; in addition, the welded parts were examined in a non-destructive test by the magnetic particle method so that it was possible to verify the defects in the weld region. A strong relationship was observed between the working electrical current range, the surface quality of the weld and the ease of handling the equipment; lower currents (up to 300 A) allowed better handling, also resulting in better surface quality of the part; the most intense currents (400 A or more) presented difficult handling, high penetration and, therefore, showed clearer weld defects.