Nitriding High Pressure

Nitriding is a thermochemical treatment of surface enrichment of nitrogen in ferritic phase conducted on steels.

This high pressure process is especially advantageous when the pieces have extremely complex shapes with very small holes and small cavities to be nitrided. These pieces makes high-pressure nitriding very competitive compared to other nitriding techniques such as ion nitriding.

Nitruración a Alta Presión

Vista de la camara interior

Nitriding processes are composed of two mechanisms:

Phase #1

A chemical conversion surface treatment
A chemical conversion treatment surface leading to the formation, on the part surface, a combination layer (white layer or composite layer) composed of iron nitrides. This white layer may have various structures.

Phase #2

A nitrogen diffusion treatment
A diffusion treatment of nitrogen in solid interstitial and well mix with alloying elements (primarily Cr, Mo, Ti, Al and V) from the steel to be treated, in finely dispersed nitrides leading to a hardening structural reinforcement at a depth called diffusion layer or zone.

Other notable advantages of High Pressure nitriding :

Titanium Easy nitriding alloy. A layer of TiN is created on the part surface which adhesion is much larger than TiN layers deposited by PVD technology (Physical Vapour Deposition).

  • Highly alloyed steels and Titanium alloys can be nitrided.

The rapid surface depassivation causes a nitriding layer rapid growth with shorter treatment.

  • Shorter treatment time versus conventional gas nitriding.

Good relationship between the volume of the chamber and the useful space. Parts precleaning before putting them may be limited to a minimum. A specific layer structure can be obtained by optimizing the process.

  • Easy process control..