Análisis de la soldabilidad de un acero de baja aleación y alta resistencia ASTM 572 por fcaw y smaw en condiciones salinas

Abstract

The purpose of this project is the study of weldability through the SMAW and FCAW processes in ASTM 572 GR 50 steel under saline environment. This steel was put on test with the application of the tekken weldability test and metallographic analysis, hardness analysis, bending test, and traction tests. The results obtained allow to recognize the behavior of the welding before and after the application of the fog test. The numner of test species for SMAW and FCAW process were the same, a total of 24, and then dividen into two groups. In addition, half of this was introduced into the chamber to further analysis once the essay end. Finally, at the end of all the tests it was determined that the preheating process of the uncoated material has high corrosion rates for the SMAW and FCAW welding processes. However, the weldability analysis shows that the SMAW process has better physical properties as they do not present fissures and present the least amount of internal discontinuities. On the other hand the mechanical tests reveal that the corrosion does not influence on the mechanical properties. In conclusion, the welding cords in both process, obtained better results for the SMAW.