Element Transfer Behaviors of Agglomerated CaF2-ZrO2 Fluxes in EH36-Shipbuilding Steel Subject to High-Heat Input Submerged Arc Welding

• Published in: Metallurgical and materials transactions. B, Process metallurgy and materials processing science Vol. 55; no. 5; pp. 3995 - 4000
• Main Authors: Chen, Angran, Zhang, Yanyun, Coetsee, Theresa, Kaldre, Imants, Wang, Cong
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.10.2024; Springer Nature B.V
• Subjects: Alloying elements; Calcium fluoride; Characterization and Evaluation of Materials; Chemical reactions; Chemistry and Materials Science; Decomposition reactions; Design; Fluxes; High strength steels; Materials Science; Metallic Materials; Metallurgy; Nanotechnology; Original Research Article; Shipbuilding; Structural Materials; Structural steels; Submerged arc welding; Surfaces and Interfaces; Thin Films; Weld metal; Wire; Zirconium dioxide
• ISSN: 1073-5615; 1543-1916
• DOI: 10.1007/s11663-024-03233-9

EH36-shipbuilding steel has been welded by CaF 2 -ZrO 2 fluxes with designed ZrO 2 additions. Possible chemical and electrochemical reactions have been postulated to analyze alloying element transfer behaviors. The decomposition of ZrO 2 during SAW has been validated by applying the gas–slag–metal equilibrium model and the O supply capacity of ZrO 2 has been quantified. For the entire compositional range, O content has been controlled within a well-maintained range from 220 to 400 ppm, and the transferred quantity of Zr content reaches to the maximum value of 120 ppm. It is further demonstrated that ZrO 2 addition incurs appreciable Si loss within the weld metal.