Element Transfer Behaviors of Fused CaF2-TiO2 Fluxes in EH36 Shipbuilding Steel During High Heat Input Submerged Arc Welding

• DOI: 10.1007/s11663-020-01936-3
• Publication Date: 2020-08-10T21:02:54Z
• Authors: Jin Zhang; Theresa Coetsee; Hongbiao Dong; Cong Wang
• Keywords: 0211 other engineering and technologies; 02 engineering and technology

Fused CaF2-TiO2 fluxes are developed and applied on EH36 shipbuilding plates under high heat input submerged arc welding. Transfer behaviors of O and major alloying elements are systematically investigated. TiO2 contributes to O gain in the weld pool, but leads to concurrent losses of Si, Mn, and C via deoxidation and decarburization reactions. Transfer of Ti to the weld metal is suppressed due to improved flux O potential and chemical interaction between CaF2 and TiO2.