THE EFFECT OF CONTROLLED ATMOSPHERE ON THE HEAT AFFECTED ZONE PROPERTIES OF GAS METAL ARC WELDING
K Kökemli, R Kaçar
article (Uluslararası, Hakemli) | Yazar(lar): K Kökemli, R Kaçar | Yıl: 2005 — Özet: Gas Metal Arc Welding (GMAW) process is widely used in industry due its improved weld pool protection against to the atmosphere gases. However, the long arc length reduces the protective effect of the shielding gas. Due to electrochemi
Gas Metal Arc Welding (GMAW) process is widely used in industry due its improved weld pool protection against to the atmosphere gases. However, the long arc length reduces the protective effect of the shielding gas. Due to electrochemical and thermochemical reactions between the weld pool and the arc atmosphere, it is quite important to enhance the toughness of the weldment by an inert atmosphere during GMAW process. Therefore, in this study a controlled atmosphere cabinet was designed. Low carbon steels were welded with classical GMAW process in argon atmosphere as well as in the controlled atmosphere cabinet by using similar welding parameters. The mechanical and metallurgical properties of both weldments were evaluated. Finally, it is concluded that the toughness of the heat affected zone was superior for the weldment made in the controlled atmosphere when compared to that of the classical GMAW process.