MATHEMATICAL EXPRESSION FOR THE PREDICTION OF PENETRATION IN BUTT JOINTS FOR DUPLEX STAINLESS STEEL SAF-2205

摘要

In order to understand the mechanism of weld bead formation, a relationship between arc welding parameters and weld bead geometry must be established. This relationship is also necessary to forecast penetration variables allowing to optimize welding parameters for particular applications. Specifically in duplex stainless steel SAF-2205 welding, the influence of arc current, arc voltage and welding speed on the penetration have been empirically studied. In this research, using a multiple linear regression method, the statistical analyses produced twelve (12) potential function dependent of these welding parameters that determines the weld bead geometry in butt joints of DSS SAF 2205 using Gas Metal Arc Welding process. The mathematical model gave as a result, a very approximate contour of the weld bead geometry between the established ranges of welding parameters used. Also, the influence of these variables on the weld penetration is studied, providing with new evidence in stainless steel welding.