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Korean Journal of Metals and Materials > Volume 55(5); 2017 > Article
Korean Journal of Metals and Materials 2017;55(5): 308-314. doi: https://doi.org/10.3365/KJMM.2017.55.5.308
Fe-Mn-Al-Si-Sb-C 강의 고온산화에 미치는 Mn, Si, Sb 첨가효과
박순용, 이동복
성균관대학교 신소재공학부
Effect of Mn, Si, and Sb on High-temperature Oxidation of Fe-Mn-Al-Si-Sb-C Steels
Soon Yong Park, Dong Bok Lee
School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
Correspondence  Dong Bok Lee ,Tel: +82-31-290-7355, Email: dlee@skku.ac.kr
Received: 26 September 2016;  Accepted: 18 November 2016.  Published online: 9 May 2017.
ABSTRACT
High Mn twinning-induced plasticity (TWIP) steels with compositions of Fe-(18.0-18.17) Mn-1.51Al-(0.48-0.52)Si-(0.61-0.62)C-(0.52-0.54)Cr-(0.22-0.23)Ni-0.03Nb-(0-0.04)Sb (wt%) are oxidized at 650 ℃ and 750 ℃ for < 24 h in air in order to determine the effect of the alloying elements on the oxidation. They are oxidized parabolically to MnO2,Mn2O3,FeO,Fe2O3, and FeMn2O4 oxides with relatively fast rates. The formed scales are prone to spallation and bi-layered. The outer scales that are formed by the outward diffusion of cations are rich in Fe and Mn, while the inner scales that are formed by the inward diffusion of oxygen are rich in Fe, Mn, Al, Cr, and Si. The isothermal and cyclic oxidation resistance progressively increases with increments in the amount of Mn, Si, and Sb.
Keywords: metals, casting, oxidation, scanning electron microscopy (SEM), high Mn TWIP steel
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