It occurs at very low temperatures (350–580°C). Components made out of steel, stainless steel and titanium can be treated. By diffusing nitrogen into the surface, a hardened layer (nitride layer) forms at the surface. This protects the component from wear and corrosion. The nitride layer consists of two component parts. The compound layer, which primarily consists of iron nitrides, and the diffusion layer, in which nitrogen is predominantly dissolved in the material and exists in the form of precipitates with alloying elements of the steel.
In this process, the compound layer is primarily characterised by a high degree of hardness, a low adhesion tendency and the passivatability of the contained iron nitrides. This provides the components with an increased level of resistance to wear through abrasion, deformation, fretting and adhesion, as well as an increased level of corrosion resistance. The diffusion layer possesses a high degree of strength, increased heat resistance and compressive residual stresses. These lead to increased vibration resistance, increased resistance to contact fatigue, to lower heat wear and increased resistance to thermal fatigue when in use, amongst other things.
Depending on the process control, the layer components can be specifically structured during plasma nitriding. As a result, the nitride layer is optimally adapted to the stress of your components in use.
Learn more about the different process versions.