Fine-Tuned Element Transfer Strategies for Ternary CaF2-SiO2-CaO Fluxes in Submerged Arc Welding: An Environmentally Friendly Approach


Submerged arc welding under high heat input has been conducted on EH36 plate employing two series of CaF2-SiO2-CaO-fused fluxes. The effects of CaO and SiO2 on element transfer between slag and weld metal are systematically evaluated using thermodynamics. It is concluded that the substitution of CaF2 by CaO is an environmentally friendly approach to suppress the transfer of Si to weld metal and decrease the loss of Mn from weld metal to slag.

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We thank the National Natural Science Foundation of China (Grant Nos. 51622401, 51861130361, 51861145312, and 51850410522), Newton Advanced Fellowship by the Royal Society (Grant No. RP12G0414), Research Fund for Central Universities (Grant No. N172502004), Xingliao Talents Program (XLYC1807024 and XLYC1802024), Liaoning Key Industrial Program (2019JH1/10100014), The Innovation Team of Northeastern University, and Global Talents Recruitment Program endowed by the Chinese government for their financial support. We thank the State Key Laboratory of Solidification Processing, Northwestern Polytechnical University (Grant No. SKLSP201805), Shagang Steel, and Lincoln Electric China. This work is also funded in part by the National Research Foundation of South Africa (BRICS171211293679).

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Correspondence to Cong Wang.

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Manuscript submitted February 29, 2020.

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Zhang, J., Coetsee, T., Dong, H. et al. Fine-Tuned Element Transfer Strategies for Ternary CaF2-SiO2-CaO Fluxes in Submerged Arc Welding: An Environmentally Friendly Approach. Metall Mater Trans B (2020).

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