The behaviour of nitrided compounds to tribological, chemical and electrochemical demands is dependent
of the structure of the compound layer. Its behaviour to cyclic, mechanical and thermal demands depends
Compound layers formed from ε-nitride are capable of providing protection layers against a wide spectrum
of damaging mechanisms that applies in special complex tribological and chemical demands.
The high hardness of the iron-nitiride leads to a high resistance against abrasive wear.
The turn to adhesion of ε-nitirde layers is due to its hexagonal structure and hardness.
Iron nitrides ar passivated and have a hig resistance against neutral salt solutions, atmospheric solutions
and tribooxidation.
A negative influence can be seen at dynamic demands because of the low stiffness f the compound layer.
The precipitates of nitride in the iner intrinsic marginalised layer leads to increase strength and to compressive
at the surface. This effect is still exhibited at high temperatures.Hence diffusion layers have higher hardness
and compressive stresses in comparison to the bulk material leading to a better high temperature strength
and tempering resistance.
The at low temperature builded precipitaion situation is also very stable at verifyng teperatures higher than
the nitriding temperature. This justifes the use of nitrided components i.e. nitrided hotworking tools or valves
operating at temperatures above the nitriding temperature.

[ more ]  (Properties de capas superficiales nitruradas y nitrocarburadas)