Surface modification by nitriding-quenching for steels

Naoko Sato, Mayumi Ojima, Yo Tomota, Kojiro Inaba

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


The nitriding-quenching is a new surface modification method which consists of heating a steel at 973-1073K in a nitrogen/ammonia gas atmosphere followed by quenching. From the fundamental point of view, this unique technique was applied to low carbon steels to investigate basic features of this treatment. Microstructure observations, X-ray diffraction, electron probe microanalysis, X-ray residual stress measurement, tensile test, fatigue test, and corrosion test were performed. It is found that high nitrogen martensite was formed near the surface and the hardness was increased up to HV800, which was dependent on the volume of retained austenite and nitrogen concentration. The nitriding-quenched steel plates show high fatigue strength and lower corrosion current density in an active solution region.

Original languageEnglish
Title of host publicationProceedings of the 17th IFHTSE Congress
PublisherThe Japan Society for Heat Treatment (JSHT)
Number of pages4
ISBN (Electronic)9780000000002
Publication statusPublished - 2009
Externally publishedYes
Event17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008 - Kobe, Japan
Duration: 2008 Oct 262008 Oct 28

Publication series

NameProceedings of the 17th IFHTSE Congress


Other17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008


  • Low carbon steel
  • Nitriding-Quenching
  • Nitrogen martensite
  • Surface hardening

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Mechanics of Materials


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