22nd November, 2017

Processes - Nitrocarburising

Nitrocarburising treatments involve the simultaneous diffusion of nitrogen and carbon into the surface of fermous materials. We have the ability to undertake two types of nitro carburising treatments using our Ipsen sealed quench furnaces.

Ferritic nitrocarburising is conducted in the range of 560 - 580°C.

Austenitic nitrocarburising is conducted in the range of 590 - 720°C.

The primary objective of these treatments is to enhance anti-scuffing properties and improve corrosions and wear resistance. The objective of the processes in to produce a thin layer of iron carbonitride and nitride "white layer" with an underlining diffusion zone contained dissolved nitrogen and iron with associated alloy nitrides depending on steel chemistry.

A significant investment on associated ancilliary safety features has been undertaken because these processes involve a highly combustible atmosphere that is explosive when operated below the self-ignition temperature of 760°C.

In addition the TPQ7 furnace has a double vestible system which ensures all minor gas leaks can be eliminated which enhances safety and improves quality control of the nitrocarbonised layers. Further the thermocouple and instrument designs ensure the hot zone in the furnace chamber is maintained within + 5°C throughout the process cycle time, which is critical during nitrocarburising cycles.

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