Study on hydrogen embrittlement resistance of vanadium molybdenum microalloyed 32MnB5 hot formed steel

Li Yuanyuan; Zhang Songqi; Wang Dejun

doi:10.7513/j.issn.1004-7638.2023.01.028

Volume 44 Issue 1

Feb. 2023

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Li Yuanyuan, Zhang Songqi, Wang Dejun. Study on hydrogen embrittlement resistance of vanadium molybdenum microalloyed 32MnB5 hot formed steel[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(1): 181-187. doi: 10.7513/j.issn.1004-7638.2023.01.028

Citation:

Li Yuanyuan, Zhang Songqi, Wang Dejun. Study on hydrogen embrittlement resistance of vanadium molybdenum microalloyed 32MnB5 hot formed steel[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(1): 181-187. doi: 10.7513/j.issn.1004-7638.2023.01.028

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Study on hydrogen embrittlement resistance of vanadium molybdenum microalloyed 32MnB5 hot formed steel

doi: 10.7513/j.issn.1004-7638.2023.01.028

Hebi College of Engineering and Technology, Henan University of Technology, Hebi 458030, Henan, China

Received Date: 2022-03-12
Publish Date: 2023-02-28

Abstract

Abstract

Different contents of vanadium and molybdenum were added into the traditional 32MnB5 hot formed steel under laboratory conditions, the hydrogen embrittlement sensitivity of the microalloyed material was evaluated by slow strain rate tensile test, and the change mechanism of hydrogen embrittlement resistance of microalloyed hot formed steel was discussed combined with results from hydrogen penetration test. It is found out that addition of V and Mo alloy elements is conducive to improve the hydrogen embrittlement resistance of the material, and the plastic loss of the material after hydrogen charging is reduced. Compared with the V-added only sample, the original austenite grain size and nano precipitate size of V-Mo combinated addition are smaller, which can effectively capture hydrogen atoms and hinder the diffusion of hydrogen atoms. Therefore, the V-Mo steel shows the best resistance to hydrogen embrittlement, and the hydrogen diffusion coefficient is reduced to 7.3×10⁻¹¹m²/s, the diffusible hydrogen concentration is reduced to 4100 mol/m³.
- hot formed steel,
- 32MnB5,
- microalloying,
- vanadium,
- molybdenum,
- hydrogen embrittlement

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References(9)

References

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