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Metal Science and Heat Treatment

, Volume 27, Issue 1, pp 3–7 | Cite as

Nitriding of chromium and its alloys at 1000–1200°C

  • Yu. M. Lakhtin
  • Ya. D. Kogan
  • O. G. Golubeva
  • E. P. Daneliya
Chemicothermal Treatment
  • 18 Downloads

Conclusions

  1. 1.

    After nitriding, at the surface of chromium and its alloys there is formation of a nitride layer consisting of Cr2N nitride. Alloying elements in the test concentration range have almost no effect on kinetics of the growth of the outer nitride layer.

     
  2. 2.

    In alloys of the Cr-Ti system beneath the chromium nitride layer a zone of internal nitriding is observed, strengthened by dispersed particles of titanium nitride TiN. The growth kinetics for the diffusion layer obeys a parabolic rule and is controlled by nitrogen diffusion in the alloy.

     
  3. 3.

    Distribution and morphology of the titanium nitride precipitate are determined by titanium concentration in the alloy, temperature, and nitriding duration. With an increase in nitriding temperature there is coalescence of particles and a reduction in hardness in the internal nitriding zone.

     
  4. 4.

    Values of coefficients for penetration of nitrogen into chromium alloys calculated by experimental data correlate with the results of other works.

     

Keywords

Chromium Nitride Titanium Nitride Nitride Layer Chromium Alloy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Literature cited

  1. 1.
    J. L. Arnold and W. C. Hagel, "The nitridation of chromium and Cr-Ti alloys," Met. Trans.,3, No. 6, 1471–1477 (1972).Google Scholar
  2. 2.
    E. P. Daneliya and V. M. Rozenberg, Internal Oxidation of Alloys [in Russian], Metallurgiya, Moscow (1978).Google Scholar
  3. 3.
    R. H. Buck and R. B. Waterhouse, "The reaction between Cr and N at 1000–1300°C," J. Less Common Met.,6, 36–50 (1964).Google Scholar
  4. 4.
    V. N. Gridnev, "Effect of vanadium on the properties of chromium alloys with Ce and nitrogen," Metallofizika, No. 72, 60–64 (1978).Google Scholar
  5. 5.
    Diffusion Data,6, No. 4, 555–556 (1972).Google Scholar

Copyright information

© Plenum Publishing Corporation 1985

Authors and Affiliations

  • Yu. M. Lakhtin
  • Ya. D. Kogan
  • O. G. Golubeva
  • E. P. Daneliya

There are no affiliations available

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