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Dictionary of Industry Terms

  • NETWORK STRUCTURE :
    A structure in which the crystals of one constituent are surrounded by envelopes of another constituent which gives a network appearance to an etched test specimen.

  • NITRIDING :
    A process by which nitrogen alone is added to a limited or specified penetration by heating certain alloy steels, which have a properly conditioned surface, in contact with ammonia gas or other substance from which the steel may absorb nitrogen. This produces an extremely hard, wear-resistant surface.

  • NORMALIZING :
    The normalizing process is applied to steel to restore its normal condition after hot working, cold working, or non-uniform cooling, or to efface the effects of a previous heat treatment. Normalizing is accomplished by heating to a temperature about 100° F. above the critical range and then cooling in still air at room temperature.

 
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