The role of temperature and pressure in the formation of etch-resistant layers

  • S. B. Nizhnik
Article

Summary

  1. 1.

    Rapid surface heating of steel leads to the formation of a surface layer which consists of two zones with structures produced by rapid tempering and secondary quenching, respectively. The thickness of each of these zones and their constitution depend on the surface temperature attained.

     
  2. 2.

    The application of a pressure pulse side by side with rapid heating confers a stress state on the structure of the rapidly tempered zone and changes the constitution and properties of the secondary-quench zone:

     
  1. a)

    As a result of fragmentation of austenite grains formed at high temperatures the temperature of the beginning of the martensitic transformation is lowered which, in turn, increases the proportion of residual austenite in the secondary-quench zone:

     
  2. b)

    The martensite formed under these conditions has a more highly stressed substructure and increased thermal stability during subsequent tempering.

     

Keywords

Austenite Thermal Stability Stress State Surface Layer Martensite 
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

© The Faraday Press, Inc. 1967

Authors and Affiliations

  • S. B. Nizhnik
    • 1
  1. 1.Mechanics InstituteAS UkrSSRKiev

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