The welds usually have a coarse columnar structure, which reduces the mechanical properties of welded assembly. In the case of submerged arc welding, the use of high-energy provides a weld with specific characteristics such as high melting rate and consequently a large volume of molten metal. It was established that the reduction in size and/or changes in the shape of the crystals obtained increases the toughness of the weld. Studies have shown that the addition of titanium to a certain limit, modify the microstructure obtained and the size of the grains solidified. In this study, we used an alloy of Fe-Ti added at the time of welding-type bead-on-plate on structural steel ASTM A 36 with a thickness of 10 mm. The additions of titanium ranged between 0.48 ppm and 29.1 ppm, and welding was performed with an energy of 1170 kJ/m The results showed changes in the phase acicular ferrite and polygonal ferrite present in the weld.
Submerged Arc Welding; Fe-Ti alloy; Microstructure; Mechanical Properties
