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| Probing microstructural evolution in weld metals subjected to varied CaF2–TiO2 flux cored wires under high heat input electro-gas welding |
| Xu Xie1,2, Ming Zhong1,2,3, Tan Zhao4, Cong Wang1,2 |
1 Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, Liaoning, China
2 School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
3 State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200444, China
4 State Key Laboratory of Metal Material for Marine Equipment and Application, Ansteel Co., Ltd., Anshan 114021, Liaoning, China |
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Abstract Fused CaF2–TiO2 fluxes have been designed, prepared, and applied in the flux cored wires to join EH36 shipbuilding steels under high heat input electro-gas welding. Ensuing microstructural evolution in the weld metals subjected to varied CaF2–TiO2 flux cored wires has been fully documented. It has been demonstrated that as the content of TiO2 in the fused fluxes increases, columnar grain size increases, and major constituents in the weld metal change from lath bainite, to granular bainite, and then to acicular ferrite. Such phenomena are elucidated via salient chemical reactions involving oxygen pickup and concurrent titanium transfer.
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Received: 07 January 2022
Published: 25 January 2023
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| Cite this article: |
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Xu Xie,Ming Zhong,Tan Zhao, et al. Probing microstructural evolution in weld metals subjected to varied CaF2–TiO2 flux cored wires under high heat input electro-gas welding[J]. Journal of Iron and Steel Research International, 2023, 30(1): 150-157.
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2023, Vol. 30 
