Hostname: page-component-76fb5796d-wq484 Total loading time: 0 Render date: 2024-04-25T08:22:32.438Z Has data issue: false hasContentIssue false
  • English
  • Français

Simultaneous numerical simulation of gas phase nitriding (NH3-H2) and of the nitrogen transfer in α-iron (550°C and 1 atm) (Part I)

Published online by Cambridge University Press:  24 June 2010

M. Rida  and
H. Tout
M. Rida
Affiliation:
Lebanese University, Faculty of Science (Section III), Department of physics, Tripoli, Lebanon
H. Tout
Affiliation:
Lebanese University, Faculty of Science (Section I), IT department, Beirut, Lebanon
Get access

Abstract

We studied, in steady and in unsteady state, the gas-solid reaction of gas nitriding (NH3-H2) of steel, in order to control the atomic nitrogen transfer in α-iron as a function of the inlet flow rates. We obtained the simultaneous simulation of the gas phase variations, and the nitrogen transfer in the sample. The evolution of the nitrogen concentration at the surface and inside of the α-iron, as a function of the time, is presented. The results are in good agreement with the experiment and with previous work. We also established a correlation between the gas composition around the sample and the inlet conditions, in order to obtain an optimal nitrogen transfer at the sample’s surface, and thus control the nitride layer growth.

Type
Research Article
Information
Metallurgical Research & Technology , Volume 107 , Issue 4 , April 2010 , pp. 117 - 124
Copyright
© EDP Sciences, 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

L. Torchane, T. Chaer, M. Rida, Optimisation des conditions de nitruration des aciers avec des mélanges NH3-H2-N2, Revue de Métallurgie, septembre 1991, p. 567
K.L. Edward, W. Hills, Aciers inoxydables ferritiques nitrurés intérieurement et procédés d’obtention de ces aciers. Cl.C23 C11/6, C22 C38/28, USA-3,804,678, USA-4,047,981, Metal Science and heat treatment, 19 (1977)
A. Constant, G. Henry, J.C. Charbonier, Principes de base des traitements thermiques des aciers, PYC édition, Paris, France, 1992
L. Torchane, Thèse INPL, Ecole des mines de Nancy, 1994
H.C.F. Rozendaal, E.J. Mittemeijer, P.F. Colijn, P.J.S. Vander, Laboratory of metallurgy, Delft University of Technology, Rotterdamseweg 137, 2628. Al Delft, Netherlands, 30 July 1982
P. Jiansheng et al., 3rd International Congress on Heat Treatment of Materials, Shanghai, 1983, p. 624
L.R. Fullman, Steel Nitriding method and apparatus, Brevet US4, 417, 927, (C1.148/16.6; c21 D1/48), 29 Nov. 1983, Appl. No. 363, 330, UK
R.B. Bird, E.W. Stewart, N.L. Edwin, Transport phenomena, John Wiley and Sons, INC, 1965
S.B. Robert, C.H. Harry, Transport phenomena, A unified Approach, McGraw-Hill, 1988
E. Saatdjian, Transport phenomena, John Wiley and Sons, New York, 2000
P.V. Suhas, Numerical heat transfer and fluid flow, Hemisphere publishing flows, 1980
M. Rida, Simulation numérique des phénomènes de transport lors de la nitruration gazeuse avec des mélanges NH3-H2, et NH3-H2-N2, Thèse, École des Mines de Nancy, INPL, 1994
Y. Adda, J. Philibert, La diffusion dans les solides, Tom I, Presses Universitaires de France, 1966
J.D. Fast, M.B. Verrijp, Journal of the Iron & Steel Institute, 1954, pp. 24-27
H.J. Grabke, Ber bunsenges, 72 (1968), pp. 541-548
Pulkinen, R.E.E., Kinetics of nitrogen of α-irons containing chromium, molybdenum, and silicon in ammonia-hydrogen mixtures, Metal science, 16 (1982), 37-40 CrossRefGoogle Scholar
Slyke, J., Ericsson, T., a study of reactions occurring during the carbonitriding process, Journal Heat Treating, 2 (1981), 3-19 CrossRefGoogle Scholar
Cheung, C.T., Simkovich, G., Reactivity of solids, 7 (1989), 115-129 Google Scholar
T. Chaer, Thèse INPL, École des Mines de Nancy, LSGS, 1995
J. Slyke, Carbonitriding, an investigation from the process point of view, Linköping studies in science and technology, Dissertation No 37, 1979