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The development of nitrogen concentration profiles on nitriding iron

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Abstract

On nitriding iron specimens nitrogen concentration profiles within the specimens are built up. A numerical method for the calculation of such concentration profiles was developed. The results calculated were compared with experimental data. It was found that during nitriding the nitrogen surface concentration approached relatively slowly the equilibrium value. This effect strongly influenced the development of the nitrogen concentration profile. The model predicted correctly the incubation time for compound(i. e., iron nitride) layer formation at the surface. If the fatigue resistance is strongly dependent on the (compressive) residual surface stress, the present treatment allows calculation of anoptimum nitriding time by determining when the maximum (compressive) residual surface stress occurs.

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Authors and Affiliations

  1. Laboratory of Metallurgy, Delft University of Technology, Rotterdamseweg 137, 2628, AL Delft, The Netherlands

    H. C. F. Rozendaal (Graduate Student), E. J. Mittemeijer (Project Leader), P. F. Colijn (Research Assistant) & P. J. Van Der Schaaf (Research Assistant)

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  1. H. C. F. Rozendaal
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  2. E. J. Mittemeijer
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  3. P. F. Colijn
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  4. P. J. Van Der Schaaf
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Rozendaal, H.C.F., Mittemeijer, E.J., Colijn, P.F. et al. The development of nitrogen concentration profiles on nitriding iron. Metall Trans A 14, 395–399 (1983). https://doi.org/10.1007/BF02644217

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  • DOI: https://doi.org/10.1007/BF02644217

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