Abstract
In this paper, a Fe–Mn–Al–C austenitic steel with certain addition of Cr and N alloy was used as experimental material. By using the SETSYS Evolution synchronous differential thermal analysis apparatus, the scanning electron microscope (SEM), the electron microprobe (EPMA) and the X-ray diffraction (XRD), the high-temperature oxidation behavior microstructure and the phase compositions of this steel in air at 600–1,000 °C for 8 h have been studied. The results show that in the whole oxidation temperature range, there are three distinct stages in the mass gain curves at temperature higher than 800 °C and the oxidation process can be divided into two stages at temperature lower than 800 °C. At the earlier stage the gain rate of the weight oxidized in temperature range of 850 °C to 1,000 °C are extremely lower. The oxidation products having different surface microstructures and phase compositions were produced in oxidation reaction at different temperatures. The phase compositions of oxide scale formed at 1,000 °C are composed of Fe and Mn oxide without Cr. However, protective film of Cr oxide with complicated structure can be formed when the oxidation temperature is lower than 800 °C.
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Acknowledgments
This work was financially supported by the National High Technology Research and Development Program of China (No. 2012AA03A508) and the National Natural Science Foundation of China (No. 51271051).
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Yuan, X., Yao, Y. & Chen, L. High-temperature Oxidation Behavior of a High Manganese Austenitic Steel Fe–25Mn–3Cr–3Al–0.3C–0.01N. Acta Metall. Sin. (Engl. Lett.) 27, 401–406 (2014). https://doi.org/10.1007/s40195-014-0071-1
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DOI: https://doi.org/10.1007/s40195-014-0071-1