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Nitriding & Nitrocarburising Technologies

Tecnologies | Procesess | Equipment | Advantages | Plasma Nitridable materials | Properties | Applications | Tips | Special Treatments

Plasma Nitriding and Nitrocarburising are thermochemical heat treatment processes. The aim of these processes is to enrich the surface of a ferrous metals with nitrogen (nitriding) or nitrogen and carbon (nitrocarburising) in order to improve the mechanical properties of the surface of the component.

Nitriding produces a hard, wear resistant layer on nitridable steels and cast iron. In addition, it considerably improves fatigue strength and by oxidizing the nitrided surface, it enhances corrosion resistance.

The main advantage of nitriding and nitrocarburising over other means of surface hardening is the low process temperature (450-600°C). Components can often be nitrided in the fully hardened and tempered condition without the core properties being adversely affected. An additional advantage of the low temperature process is the low risk of distortion. Consequently the parts can be machined to final dimensions and do not need costly finishing work such as grinding or straightening after nitriding.

Nitriding and nitrocarburising are mainly used for ferrous components such as valves, camshafts and piston rods in the mechanical engineering and automotive industries. Other applications are cutting tools or large forming dies. Cast iron parts, such as pump and gear houses, can also be nitrided.

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