Oxidation resistance mechanism of Si-Cr press hardening steel with Si and Cr alloy elements

DOI

10.2991/978-94-6463-581-2_40How to use a DOI?

Keywords

PHS; Si-Cr addition; Oxidation resistance mechanism; Fe2SiO4; FeCr2O4

Abstract

Press hardening steel (PHS) is widely used in the production of automotive components. However, the traditional 22MnB5 steel, during the heating and hot stamping process, tends to develop a substantial amount of loose and easily detachable oxide scale on the surface, negatively impacting the lifespan of molds and the quality of forming. To address this issue, this work designed PHS with different component ratios (Si, Cr, Ni, Cu, and Mo) based on the composition of 22MnB5. High-temperature oxidation tests were conducted on the designed steels under conditions of 930℃ withholding times ranging from 5 to 30 minutes. The results highlight that the Si-Cr composite PHS exhibits the most remarkable resistance to oxidation. Microscopic characterization and phase analysis of the oxide layer structure reveal the formation of a Si-Cr enrichment layer between the matrix and the oxide layer, consisting of Fe₂SiO₄ and FeCr₂O₄. This dense enrichment layer, tightly binds to the matrix, hindering the outward diffusion of Fe from the matrix. The Si-Cr steel demonstrates an 88% reduction in oxide weight gain compared to 22MnB5 steel. This research would provide insights for the future development of PHS in the automotive industry, particularly in addressing challenges associated with oxide scale formation during the heating and hot stamping processes.

Copyright

© 2024 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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TY  - CONF
AU  - Xia Pu
AU  - Cong Long
AU  - Xiangxing Deng
AU  - Jian Wang
AU  - Lintao Gui
AU  - Jinsheng Zhang
AU  - Zhibai Wang
AU  - Xiaomin Xu
AU  - Yan Zhao
AU  - Hongzhou Lu
AU  - Yangwei Wang
PY  - 2024
DA  - 2024/12/07
TI  - Oxidation resistance mechanism of Si-Cr press hardening steel with Si and Cr alloy elements
BT  - Proceedings of the 7th International Conference on Advanced High Strength Steel and Press Hardening (ICHSU 2024)
PB  - Atlantis Press
SP  - 324
EP  - 334
SN  - 2590-3217
UR  - https://doi.org/10.2991/978-94-6463-581-2_40
DO  - 10.2991/978-94-6463-581-2_40
ID  - Pu2024
ER  -