7. Properties of nitrided parts

Nitriding or nitrocarburizing treatments provide, to a greater or lesser extent depending on the process and the materials treated, the following characteristics:

• high surface hardness ;

• chemical modification by growth of a combination layer ;

• compressive prestressing of the surface.

The resulting properties are mainly :

• increased fatigue strength, especially in the presence of notch effects and stress concentrations;

• improved resistance to seizure, adhesive bonding and wear caused by small movements, mainly thanks to the properties of the combination layer;

• increased resistance to abrasion due to the effect of increased hardness ;

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