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

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Abstract

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.

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We thank the National Natural Science Foundation of China (Grant Nos. 51622401, 51861130361, 51861145312, and 51850410522), Royal Academy of Engineering (TSPC1070), Newton Advanced Fellowship by the Royal Society (Grant No. RP12G0414), Research Fund for Central Universities (Grant No. N172502004, N2025025), 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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Authors and Affiliations

  1. School of Metallurgy, Northeastern University, Shenyang, 110819, China

    Jin Zhang, Hongbiao Dong & Cong Wang

  2. Department of Materials Science and Metallurgical Engineering, University of Pretoria, Pretoria, 0002, South Africa

    Theresa Coetsee

  3. Department of Engineering, University of Leicester, Leicester, LE1 7RH, UK

    Hongbiao Dong

  4. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, China

    Cong Wang

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  1. Jin Zhang
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  2. Theresa Coetsee
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  4. Cong Wang
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Correspondence to Cong Wang.

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Manuscript submitted May 28, 2020.

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Zhang, J., Coetsee, T., Dong, H. et al. Element Transfer Behaviors of Fused CaF2-TiO2 Fluxes in EH36 Shipbuilding Steel During High Heat Input Submerged Arc Welding. Metall Mater Trans B 51, 1953–1957 (2020). https://doi.org/10.1007/s11663-020-01936-3

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