Study on the diffusion behavior of carbon during solid-state decarbonization process

Zhu Guangpeng; Ai Liqun; Hong Lukuo; Meng Fanjun; Wen Li; Sun Caijiao

doi:10.7513/j.issn.1004-7638.2024.06.017

Volume 45 Issue 6

Dec. 2024

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Article Navigation > IRON STEEL VANADIUM TITANIUM > 2024 > 45(6): 127-132

Zhu Guangpeng, Ai Liqun, Hong Lukuo, Meng Fanjun, Wen Li, Sun Caijiao. Study on the diffusion behavior of carbon during solid-state decarbonization process[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(6): 127-132. doi: 10.7513/j.issn.1004-7638.2024.06.017

Citation:

Zhu Guangpeng, Ai Liqun, Hong Lukuo, Meng Fanjun, Wen Li, Sun Caijiao. Study on the diffusion behavior of carbon during solid-state decarbonization process[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(6): 127-132. doi: 10.7513/j.issn.1004-7638.2024.06.017

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Study on the diffusion behavior of carbon during solid-state decarbonization process

doi: 10.7513/j.issn.1004-7638.2024.06.017

1.
Collegee of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China
2.
Hebei Iron and Steel Coating Anti-Corrosion Technology Innovation Center, Jingye Iron and Steel Co., Ltd. , Shijiazhuang 050400, Hebei，China

Received Date: 2023-11-17
Available Online: 2024-12-30
Publish Date: 2024-12-30

Abstract

Abstract

In order to study the decarburization effect of Fe-C-Mn alloy strips during solid-state decarburization and the diffusion effect of Mn content on C atoms, the solid-state decarburization test was carried out with Fe-2.7%C-(5%, 12%) Mn alloy composition and 1 mm thickness strips. The molecular dynamics simulation test was carried out by using Lammps software to explore the qualitative law of Mn content on C atom diffusion. The results show that the diffusion activation energy calculated by molecular dynamics simulation is basically the same as that calculated by solid state decarburization experiment. The diffusion activation energy of C atom in 5%Mn at 1223 K, 1323 K and 1363 K is 78.549 kJ·mol⁻¹ and 83.805 kJ·mol⁻¹, respectively. The solid-state decarburization test was carried out at 1363 K. The main limiting step of 5%Mn and 12%Mn alloy strips for 5~20 min was internal carbon diffusion. The decarburization effect of 12%Mn was not as good as that of 5%Mn, indicating that the increase of Mn content inhibited C diffusion. Molecular dynamics simulation results shows that the increase of Mn content reduces the diffusion ability of C atoms.
- solid-state steelmaking,
- gas-solid reaction,
- molecular dynamics,
- diffusion coefficient

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References

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