Effects of oxygen content on the oxidation process of Si-containing steel during anisothermal heating

Abstract

The oxidizing behavior of Si-containing steel was investigated in an O₂ and N₂ binary-component gas with oxygen contents ranging between 0.5vol% and 4.0vol% under anisothermal-oxidation conditions. A simultaneous thermal analyzer was employed to simulate the heating process of Si-containing steel in industrial reheating furnaces. The oxidation gas mixtures were introduced from the commencement of heating. The results show that the oxidizing rate remains constant in the isothermal holding process at high temperatures; therefore, the mass change versus time presents a linear law. A linear relation also exists between the oxidizing rate and the oxygen content. Using the linear regression equation, the oxidation rate at different oxygen contents can be predicted. In addition, the relationship between the total mass gain and the oxygen content is linear; thus, the total mass gain at oxygen contents between 0.5vol%–4.0vol% can be determined. These results enrich the theoretical studies of the oxidation process in Si-containing steels.

Keywords

oxidation / oxygen content / oxidation rate / Si-containing steel / fayalite / anisothermal heating

References

[1] Ginzburg V.B. Steel-rolling Technology: Theory and Practice, 1989, New York, Marcel Dekker Inc 301.

[2] Kofstad P. High Temperature Corrosion, 1988, London, Elsevier Applied Science 382.

[3] Zhou M.X., Xu G., Hu H.J., Yuan Q., Tian J.Y. The morphologies of different types of Fe₂SiO₄–FeO in Si containing steel. Metals, 2017

[4] Hu Z.W., Xu G., Hu H.J., Wang L., Xue Z.L. In situ measured growth rates of bainite plates in an Fe–C–Mn–Si superbainitic steel. Int. J. Miner. Metall. Mater., 2014, 21(4): 371.

[5] Yang Y.L., Yang C.H., Lin S.N., Chen C.H., Tsai W.T. Effects of Si and its content on the scale formation on hot-rolled steel strips. Mater. Chem. Phys., 2008, 112(2): 566.

[6] Kiyoshi K., Ryoko W., Tomoharu I., Mikako T., Takashi O., Guo X.P. High-temperature oxidation behaviour and scale morphology of Si-containing steels. ISIJ Int., 2007, 47(9): 1329.

[7] Yuan Q., Xu G., Zhou M.X., He B. The effect of the Si content on the morphology and amount of Fe₂SiO₄ in low carbon steels. Metals, 2016

[8] Yuan Q., Xu G., Zhou M.X., He B. New insights into the effects of silicon content on the oxidation process in silicon-containing steels. Int. J. Miner. Metall. Mater., 2016, 23(9): 1048.

[9] Yuan Q., Xu G., Zhou M.X., He B., Hu H.J. The effect of P on the microstructure and melting temperature of Fe₂SiO₄ in silicon-containing steels investigated by in situ observation. Metals, 2017

[10] Q. Yuan, G. Xu, B. He, M.X. Zhou, and H.J. Hu, A method to reduce the oxide scale of silicon-containing steels by adjusting the heating route, Trans. Indian Inst. Met., DOI 10.1007/s12666-017-1200-0.

[11] Cao G.M., Liu X.J., Sun B., Liu Z.Y. Morphology of oxide scale and oxidation kinetics of low carbon steel. J. Iron Steel Res. Int., 2014, 21(3): 335.

[12] Mouayd A.A., Koltsov A., Sutter E., Tribollet B. Effect of silicon content in steel and oxidation temperature on scale growth and morphology. Mater. Chem. Phys., 2014, 143(3): 996.

[13] Abuluwefa H., Guthrie R.I.L., Ajersch F. The effect of oxygen concentration on the oxidation of low-carbon steel in the temperature range 1000 to 1250°C. Oxid. Met., 1996, 46(5-6): 423.

[14] Chen R.Y., Yuen W.Y.D. Review of the high-temperature oxidation of iron and carbon steels in air or oxygen. Oxid. Met., 2003, 59(5-6): 433.

[15] Upthegrove C. Scaling of Steel at Heat-Treating Temperatures, 1933, Menasha, George Banta Publ. 56.

[16] Abuluwefa H.T. Kinetics of high temperature oxidation of high carbon steels in multi-component gases approximating industrial steel reheat furnace atmospheres. The International Multi Conference of Engineers and Computer Scientists, 2012 1664.

[17] Liu Z.Y., Gao W. A numerical model to predict the kinetics of anisothermal oxidation of metals. High Temp. Mater. Processes, 1998, 17(4): 231.

[18] Markworth A.J. On the kinetics of anisothermal oxidation. Metall. Trans. A, 1977, 8(12): 2014.

[19] He B., Xu G., Zhou M.X., Yuan Q. Effect of oxidation temperature on the oxidation process of silicon-containing steel. Metals, 2016

[20] Liu X.J., Cao G.M., He Y.Q., Jia T., Liu Z.Y. Effect of temperature on scale morphology of Fe–1.5Si alloy. J. Iron Steel Res. Int., 2013, 20(11): 73.

[21] Story S.R., Fruehan R.J. Kinetics of oxidation of carbonaceous materials by CO₂ and H₂O between 1300°C and 1500°C. Metall. Mater. Trans. B, 2000, 31(1): 43.

[22] Kofstad P., Hed A.Z. Defect structure model for wustite. J. Electrochem. Soc., 1968, 115(1): 102.

[23] Wagner C. Theoretical analysis of the diffusion process determing the oxidation rate of alloys. J. Electrochem. Soc., 1952, 99(10): 369.

[24] Logani R., Smeltzer W.W. Kinetics of wustite-fayalite scale formation on iron-silicon alloys. Oxid. Met., 1969, 1(1): 3.