Effect of the GMAW metal-transfer mode on the weld-metal structure of HSLA X80

This paper presents the influence of the metal-transfer mode during GMAW of 10-mm-thick HSLA steel grade X80 on the inclusions and acicular ferrite content in the weld metal.Welding of butt joint specimens was carried out by the conventional short-circuit and CBT metal-transfer mode with different shielding gases and wire feed speeds.An analysis of obtained results showed that the metal-transfer mode affects the weld-metal structure by influencing the acicular ferrite content in relation to the number and size of the inclusions found in the weld metal.