Intermediate-Temperature Oxidation of Fe-Cr-Ni-Mo Stainless Maraging Steel in Air

Abstract:

The oxidation behavior of Fe-Cr-Ni-Mo-Ti maraging steel was investigated within an intermediate temperature range of 450-600°C. Analysis of oxidation kinetics demonstrated excellent oxidation resistance after exposure in air for 100 h; the oxide layer formed was protective and can resist further oxidation. Surface morphology evolution and oxidized surface hardness were characterized by scanning electron microscope and nanoindentation test. The surface oxidation film was rather smooth with Cr enriched at 450°C, appeared a needle-like structure at 500°C together with a few nodule protrusions enriched in O but absent in Fe and Cr; and then transformed to a smooth and compact oxide surface with some protrusion emerged on the original grain boundaries of austenite at 550°C; finally a Fe₂O₃ phase particle structure appeared at 600°C. The oxidation layer formed on substrate of Fe-Cr-Ni-Co-MoTi was harder than the substrate when oxidation temperature was lower than 550°C.

• Periodical: Applied Mechanics and Materials (Volumes 423-426)
• Pages: 192-196
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.423-426.192
• Online since: September 2013
• Authors: Fan Yan Meng, Teng Fei Su, Jia Dong Guan, Jian An, Xiao Xia Lv
• Keywords: Hardness, Maraging Steel, Oxidation

References

[1] G.P. Miller and W.I. Mitchell: J. Iron Steel Inst. Vol. 20 (1965), p.899.

[2] V.K. Vasudevan, S.J. Kim and C.M. Wayman: Metall. Trans. A. Vol . 21 (1990), p.2655.

[3] R. Schnitzer, S. Zinner and H. Leitner: Scripta Mater. Vol. 62 (2010), p.286.

[4] J. Grum, J. M. Slabe: Applied Surface Science. Vol. 252 (2006), p.4486.

[5] J.H. Wu and C.K. Lin: Metall. Trans. A. Vol. 33 ( 2002), p.1715.

[6] C. Oswald and H.J. Grabke: Corrosion Science. Vol. 46 (2004) , p.1113.