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Addressing Weld Metal Compositional Variations in EH36 Shipbuilding Steel Processed by CaF2-SiO2-CaO-TiO2 Fluxes

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Abstract

Fused CaF2-SiO2-CaO-TiO2 fluxes are designed and applied to join EH36 shipbuilding steel under high heat input submerged arc welding. Pertinent elemental transfer behaviors of major alloying elements are quantified and possible chemical reactions have been postulated. It is found that transfer of Si and O is enhanced by increasing TiO2 addition, although that of Si is concurrently dependent on SiO2 activity. Furthermore, a unique neutral point is identified with regard to Ti transfer.

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Acknowledgments

The authors sincerely thank the National Natural Science Foundation of China (Grant Nos., U20A20277, 52104295, 52011530180, and 52050410341), Royal Academy of Engineering (TSPC1070), Research Fund for Central Universities (Grant Nos. N2125003, N2025025), Regional Innovation Joint Fund of Liaoning Province (2020-YKLH-39), and the Open Foundation of State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing (Grant No. KF21-02).

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Zhang, Y., Zhang, J., Liu, H. et al. Addressing Weld Metal Compositional Variations in EH36 Shipbuilding Steel Processed by CaF2-SiO2-CaO-TiO2 Fluxes. Metall Mater Trans B 53, 1329–1334 (2022). https://doi.org/10.1007/s11663-022-02480-y

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