TY - JOUR
AU - Kogan, Ya.
AB - UDC 621.785.532:620.18 Yu. M. Lakhtin and Ya. D. Kogan We present an analysis of diffusion saturation of metals and alloys with nitrogen from the viewpoint of internal nitration. Nitriding of metals and alloys results in the formation of multilayer diffusion coatings consisting of a nitride zone on the surface and a diffusion sub~.ayer -- a zone of internal nitration. This zone is a multi- phase region consisting of a solid solution of nitrogen in the base metal, nitrides of the base metal, and nitrides of alloying elements. The operating conditions determine the properties required for the diffusion coating, which depend on its structure and phase composition. Machine parts operating in a corrosive environment and subject to wear under small contact loads require a nitride case with good run-in characteristics and resistance to corrosion. Machine parts subject to wear with large loads under fatigue conditions at elevated temperatures require a nitride case with a diffusion sublayer " a zone of internal nitration. A nitride case with a diffusion sublayer has been called "internal nitration" [I] by analogy with internal oxidation. Depending on the nitrogen activity of the alloying element, first- or second-order internal nitration may occur (Fig. i). First-order internal 
TI - Internal nitration of metals and alloys
JF - Metal Science and Heat Treatment
DO - 10.1007/BF00663059
DA - 2004-11-03
UR - https://www.deepdyve.com/lp/springer-journals/internal-nitration-of-metals-and-alloys-cI8QpISE0h
SP - 217
EP - 224
VL - 16
IS - 3
DP - DeepDyve
ER -