Proceedings of the 6th International Conference on Advanced High Strength Steel and Press Hardening (ICHSU 2022)

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Improvement Study of Hydrogen Embrittlement Resistance of Al-Si Coated Hot Stamped Components

Authors
Y. Feng1, 2, *, G. J. Huang1, H. Song1, H. Z. Lu3, X. Gao2, M. T. Ma2, L. Cui4, Z. G. Deng4, Y. P. Sun5, K. J. Li6, P. G. Cao6, Z. H. Cai7, S. Liu7
1Chongqing University, Chongqing, 400044, China
2China Automotive Engineering Research Institute Co., Ltd, Chongqing, 401122, China
3CITIC-CBMM Microalloying Technical Center, CITIC Metal Co., Ltd, Beijing, 100004, China
4Technology Center of Ma’anshan Iron and Steel Company, Ma’anshan, 243000, China
5Yantai Lingyunjiensi Technology Co., Ltd., Yantai, 264006, China
6Chongqing Institute of Science and Technology, Chongqing, 401331, China
7Taiyuan University of Science and Technology, Taiyuan, 030024, China
*Corresponding author. Email: fengyi@caeri.com.cn
Corresponding Author
Y. Feng
Available Online 2 March 2023.
DOI
10.2991/978-94-6463-114-2_13How to use a DOI?
Keywords
Press hardening steel; Hydrogen embrittlement; Microalloying; Al-Si coating
Abstract

Because of its ultra-high strength, press hardening steel and hot stamped parts are widely used in the reinforcement and lightweight structure of car bodies. At present, there are hydrogen embrittlement barriers in PHS1500~PHS2000 materials with coating and PHS1800~PHS2000 materials without coating. In this paper, based on the conventional thickness coating PHS1500 without niobium and the thin thickness coating PHS1500 with niobium, the corresponding automobile hot stamped front crash beam parts are trial produced. The trial production process is completed under the dew point control condition of -20 ℃. Samples were taken from hot stamped parts made of two materials. Firstly, based on the automotive industry standard T/CSAE 155-2020, a U-shaped constant bending load test was carried out to compare the hydrogen embrittlement resistance of parts made of two materials. The results show that under the same external load conditions, the fracture time of the sample of thin coating containing niobium with austenitizing time of 220 s is higher than that of the sample of conventional coating without niobium with austenitizing time of 300 s. Further, TDS and slow strain rate tensile tests were carried out on the samples of the two materials. The results show that the thin coating containing niobium has low diffusive hydrogen content and strong resistance to hydrogen damage. The fundamental reason why the samples with thin coatings containing niobium have stronger hydrogen embrittlement resistance is the regulation effect of niobium on grain boundaries, precipitation and retained austenite, and the stronger inhibition effect of thin coatings on hydrogen induced cracks.

Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 6th International Conference on Advanced High Strength Steel and Press Hardening (ICHSU 2022)
Series
Atlantis Highlights in Material Sciences and Technology
Publication Date
2 March 2023
ISBN
978-94-6463-114-2
ISSN
2590-3217
DOI
10.2991/978-94-6463-114-2_13How to use a DOI?
Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Y. Feng
AU  - G. J. Huang
AU  - H. Song
AU  - H. Z. Lu
AU  - X. Gao
AU  - M. T. Ma
AU  - L. Cui
AU  - Z. G. Deng
AU  - Y. P. Sun
AU  - K. J. Li
AU  - P. G. Cao
AU  - Z. H. Cai
AU  - S. Liu
PY  - 2023
DA  - 2023/03/02
TI  - Improvement Study of Hydrogen Embrittlement Resistance of Al-Si Coated Hot Stamped Components
BT  - Proceedings of the 6th International Conference on Advanced High Strength Steel and Press Hardening (ICHSU 2022)
PB  - Atlantis Press
SP  - 92
EP  - 104
SN  - 2590-3217
UR  - https://doi.org/10.2991/978-94-6463-114-2_13
DO  - 10.2991/978-94-6463-114-2_13
ID  - Feng2023
ER  -