Influence of Nitrogen on Oxidation Resistance of Automotive Steel Grades

Abstract:

With the objective of partial and total replacement of nickel by nitrogen in austenitic exhausted valve steel X45CrNiW18-9, a program of work with series of experimental heats was designed. Experimental heats were carried out in 10 Kg. induction furnace under nitrogen pressure. The chemical composition of produced stainless steels was determined. The produced automotive steel grades were forged. The nitrogen contents were determined. The produced forged stainless steels were subjected to solution treatment at 1050 °C for 1 hour, followed by water cooling. Isothermal oxidation test is used to detect the behavior of new grades at different temperatures in air for solution treated stainless steels. The mass gain was measured for samples exposed to air at temperatures (500 °C, 600 °C, 700 °C, 800°C) for different time intervals, up to 1000 hrs. The oxide layer thickness for two selected steels was investigated by using optical microscope. XRD was used to detect types of oxides which are formed during oxidation process at 800 °C for 1000 hrs for represented investigated exhausted valve steels. Scanning Electron Microscope was used to make scan steels surface, after heating at 500 °C and 800 °C for l000hr. The mechanism of the oxidation of developed steels was investigated. It was found controlled by diffusion mechanism and the kinetic of oxidation process is parabolic. Oxidation rate of the investigated stainless steels for times, up to 8 h and between 200 andl000 h, at all investigated temperatures (500 °C - 800 °C), is parabolic and the oxidation is diffusion controlled. While in the time region 10 to 200 h, it obeys combined mechanisms. Partial replacement of nickel, by nitrogen, improves the oxidation resistance in air at temperature range 500°C - 800°C.

• Periodical: Key Engineering Materials (Volume 835)
• Pages: 83-92
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.835.83
• Online since: March 2020
• Authors: Saeed Ghali*, Mamdouh Eissa, Hoda El Faramawy, Azza Ahmed, Fathy Baiomy, Michael Lamie
• Keywords: Automotive Steel, Kinetics, Nitrogen Steel, Oxidation Resistance

References

[1] V.G. Gavriljuk, H. Berns: High nitrogen steels" structure, properties, manufacture, applications, Springer- Verlag Berlin Heidelberg, Germany, (1999).

[2] M.O. Speidel and P.J. Uggowitzer: R.A. Lula (ed.), Proc. Materials Week 92, Chicago, ASM Int., p.135, (1993).

[3] ASM International, Heat Treater,s Guide Practices and Procedures for Irons and Steels Harry Chandler, Editor, copyright (1995).

[4] L. Pryce and K. W. Andrews, J. Iron Steel Inst., 195, p.415, (1960).

[5] C. Lille, R. F. A. Jargelius — Pettersson Factors affecting the oxidation mode of stainless steels, Materials at High Temperatures, 17, No.2, pp.287-292, (2000).

DOI: 10.1179/mht.2000.17.2.016

[6] M. Sagara, H. Uno, Y. Katada, T. Kodama Effect of alloying elements on localized corrosion characteristics of nitrogen-bearing stainless steels and evaluation of crevice corrosion in seawater environment,, JISI, 88, No.10, 672-677, (2002).

DOI: 10.2355/tetsutohagane1955.88.10_672

[7] M. Sagara, Localized corrosion resistance of high nitrogen stainless steel,, ISIJ Bulletin, 7, No.11, 858- 859, (2002).

[8] H. Baba, T. Kodarwa, Y. Katada Role of nitrogen on the corrosion behaviour of austenitic stainless steels,, Corrosion Science, 44, No. 10, 2393-2407, (2002).

DOI: 10.1016/s0010-938x(02)00040-9

[9] C. Issartel, H. Buscail, E. Caudron, R. Cueff, F. Riffard, S. Perrier, P. Jacquet, M. Lambertin Influence of nitridation on the oxidation of a 304 steel at 800°C ,, Corrosion Science, 46, 2191-2201, (2004).

DOI: 10.1016/j.corsci.2004.01.018

[10] C. Zappfe , Stainless steels ,ASM. , (1949).

[11] J. Cook and B. R. Brown, J. Iron Steel Inst., 171, p.345, (1952).

[12] Y. S. Lim, J. S. Kim, S. J. AIn, H. S. Known, Y. Katada The influences of microstructure and nitrogen alloying on pitting corrosion of type 3 16L and 20% Mn-subtituted type 3 16L stainless steels,, Corrosion Science, 43, No.1, 53-68, (2001).

DOI: 10.1016/s0010-938x(00)00074-3

[13] S. Tanaka, K. Yamamura and M. Oohori The development of bearing steels with long life and high corrosion resistance,, Bearing Steel Technology, ASTM Special Technical Publication, 1419, 4 14-424, (2002).

DOI: 10.1520/stp10870s

[14] M. Sagara 'Localized corrosion resistance of high nitrogen stainless steel',, ISIJ Bulletin, 7, No.11, pp.858-859, (2002).

[15] E.K. Arthur et al., Carbon and Nitrogen Concentration Profiles of Cassava-Pack Carbonitrided Steel: Model and Experiment,, Advanced Materials Research, Vol. 1132, pp.313-329, (2016).

DOI: 10.4028/www.scientific.net/amr.1132.313

[16] J. K. Shin et al., A Study of Nitrogen Effect on the Characteristics of Creep-Rupture in 18Cr-9Ni Austenitic Steels ,, Key Engineering Materials, Vols. 297-300, pp.409-414, (2005).

DOI: 10.4028/www.scientific.net/kem.297-300.409

[17] Y. S. Kim et al., Deformation Behavior of Nitrogen Bearing Austenitic Steels with Various Nitrogen Contents,, Key Engineering Materials, Vols. 345-346, pp.117-120, (2007).

DOI: 10.4028/www.scientific.net/kem.345-346.117

[18] Saeed N. Ghali , Low carbon high nitrogen low nickel stainless steel,, steel research int. 84, No.5, 450-456 (2013).

DOI: 10.1002/srin.201200152

[19] S. N. Basu, G. J. Yurek Effect of alloy grain size and silicon content on the oxidation of austenitic Fe-Cr-Ni- Mn-Si alloys in pure O2,, Oxid. Met., 36, No. 3/4, 281-315, (1991).

DOI: 10.1007/bf00662967

[20] Y. Hosoi, S. Moteki , Y. Shimoide , Y. Sasaki, K. Miyahara Effect of nitrogen, carbon, and tungsten on high - temperature oxidation of 12%Cr-15%Mn austenitic steel,, ISIJ, 36, No.7, 834-839, (1996).

DOI: 10.2355/isijinternational.36.834

[21] H. P. Leckie, H. H. Uhlig; J. Electrochem. Soc. 113, 1262-1267, (1966).

[22] F. Masuyama, K. Hiromatsu and Y. Hasegawa 'High temperature oxidation behavior of high nitrogen ferritic steels',, ISIJ International, 36, No. 7, pp.825-833, (1996).

DOI: 10.2355/isijinternational.36.825