Oxidation resistance and mechanical properties of Al2O3-forming and SiO2-forming austenitic stainless steels between 1023 K and 1173 K

Shen, Lin; Wang, Yongning; Jing, Tengfei; Peng, Huabei; Wen, Yuhua

doi:10.1016/j.corsci.2022.110914

Cited by 6 publications

(1 citation statement)

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“…By forming protective oxidation layers (Cr 2 O 3 , FeCr 2 O 4 , SiO 2 , Fe 2 SiO 4 , etc. ), Cr [9][10][11] and Si [12] significantly improve the oxidation resistance of steel. Jae-Young Park et al [13] found that the oxidation of Fe-Si-Cr alloys at 650 • C produced a double-layer structure oxide with Cr 2 O 3 in the outer layer and SiO 2 in the inner layer.…”

Section: Introductionmentioning

confidence: 99%

Studying the Effect of Cr and Si on the High-Temperature Oxidation-Resistance Mechanism of Hot Stamping Steel

Wu,

Zhang,

Zhu

et al. 2023

Metals

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The surface of hot stamping steel is severely oxidized during heating, holding, and transfer from the heating furnace to the stamping die in the production of traditional automotive parts. Coating-free hot stamping steel with Cr and Si elements exhibits excellent oxidation resistance during hot stamping without the protection of a surface coating. This paper investigates the oxidation behavior of three types of hot stamping steel at 800–1200 °C. The results show that although Cr-Si hot stamping steel performs excellently short-term (≤7.5 min) for oxidation resistance, its long-term (≥15 min) or high-temperature (≥1100 °C) oxidation resistance is much lower than that of the conventional hot stamping steel 22MnB5, affecting the production and surface quality control of the new coating-free Cr-Si hot stamping steel. By analyzing the oxidation kinetics and characterizing the structure of oxide layers in hot stamping steel, it was found that the structural change in the Cr and Si element enrichment layer between the oxide scale and the substrate varied in oxidation performance at different temperatures. When the oxidation temperature was below 1000 °C, the solid Cr and Si enrichment layer acted as a barrier to prevent the diffusion of Fe ions. When the oxidation temperature exceeded 1100 °C, the molten Cr and Si enrichment layer effectively adapted to the substrate and avoided blistering. Meanwhile, Fe2SiO4 penetrated the Fe oxide layer along the grain boundary and became a rapidly diffusing channel of Fe ions, contributing to a significant increase in the oxidation rate.

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