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What is Marangoni Convection in GTA Welding about?

The study investigates the impact of CO2 additions to argon shielding gas on weld shape and penetration during gas thermal arc (GTA) welding of SUS304 stainless steel. It finds that varying CO2 concentrations lead to different weld shapes and penetration depths, influenced by the oxygen content in the weld pool, which alters the Marangoni convection mode. A model is proposed to explain the interaction between CO2 and the molten pool, highlighting the significance of oxygen as an active solute in the welding

Author

Peigang Li

Language

EN