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| The influence of adding niobium and vanadium on hydrogen diffusion in 22MnB5 hot stamping steel |
| Peng-wei Zhou1,2, Zhi-yi Yan1, Ke Wang1, Tao Liu1, Si-jia chen1, Zhen Ma1, Ju-sha Ma1, Wei Ding2, Yi Luo2, Bing-gang Liu2, Wei Li2 |
| 1 Shanghai Institute of Space Power-Sources, Shanghai 200245, China 2 State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200245, China |
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Abstract Adding alloying elements is always considered as an effective method to enhance the resistance against hydrogen embrittlement in steels. Nb and V were added into 22MnB5 hot stamping steel, and then their influences on hydrogen permeation of 22MnB5 steel suffering from corrosion in 3.5% NaCl aqueous solution were investigated. The results showed that the addition of Nb/V could reduce the hydrogen permeation content due to solution corrosion. Electrochemical techniques including electrochemical impedance spectroscopy and overpotential stepping hydrogen permeation test confirmed that compared to the original 22MnB5 steel, 22MnB5-Nb/V steel owned a higher corrosion resistance and a higher hydrogen diffusion resistance. Furthermore, it was confirmed that Nb–V-alloyed 22MnB5 steel showed higher resistance against hydrogen embrittlement than the Nb–V-free counterpart, which should be related to the presentence of nanoscaled Nb/V-containing precipitates as the irreversible trapping sites for hydrogen detected by thermal desorption spectroscopy. Finally, the lattice diffusion coefficient of hydrogen DL was determined in steels with and without Nb and V.
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| Cite this article: |
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Peng-wei Zhou,Zhi-yi Yan,Ke Wang, et al. The influence of adding niobium and vanadium on hydrogen diffusion in 22MnB5 hot stamping steel[J]. Journal of Iron and Steel Research International, 2023, 30(10): 2031-2042.
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2023, Vol. 30 
