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Journal of Materials Science

, Volume 28, Issue 18, pp 5036–5039 | Cite as

Macroscopic characteristics of plasma-nitrided AISI 4340 steel

  • I. T. Lawall
  • J. L. Muzart
  • I. Kuhn-Arroyo
  • A. R. De Souza
Papers

Abstract

Plasma-nitrided AISI 4340 steel, in a low-pressure abnormal glow discharge was studied. The layer formation and their characteristics, were studied as a function of the main macroscopic parameters of the gas discharge: gas flow, N2/H2 mixture, treatment time and sample temperature. The nitrided layers were characterized using a metallographic microscope coupled to a microhardness tester and X-ray techniques. Typical results obtained for samples which were nitrided for 2 h in a gas mixture of 0.9N2+0.1 H2 at 793 K, showed a white layer composed of ε and γ′ phases, 20 μm thick, and a 1100 HV20 microhardness.

Keywords

Nitrided Treatment Time Sample Temperature Glow Discharge Typical Result 
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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Copyright information

© Chapman & Hall 1993

Authors and Affiliations

  • I. T. Lawall
    • 1
  • J. L. Muzart
    • 1
  • I. Kuhn-Arroyo
    • 1
  • A. R. De Souza
    • 1
  1. 1.Depto. de Fisica/LABMAT-UFSCFlorianópolis-SCBrazil

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