Advantages of the process include the ability to harden materials which are not pre-hardened, the relatively low temperature of the process which minimises distortion, and relative low cost in comparison to carburizing or other case hardening processes.
Oil and gas, valve, pump, agriculture equipment, automotive, stamping, textile, extrusion and injection moulding, and firearms components.
Oil and gas – gears and pinion shafts
Valve components - gates, seats, balls, stems, regulator valves
Pump components - impellor housings, bodies, plungers, cylinders
Agriculture equipment - harvesting combine cutters, separators, crop transfer, chopping components
Automotive - diesel engine oil pumps, gears, crankshafts and camshafts
Stamping – dies, tooling
Textile – grooved drums
Extrusion and injection mould – moulding augers, barrels, die components
Firearms – slides on automatic firearms
Nitrocarburizing can be applied to the same materials as in nitriding, as well as unalloyed materials, where good wear resistance and some improved fatigue resistance are needed at a low cost. It is widely used for stampings, as an alternative to hard plating.
Nitrocarburizing is carried out at sub-critical temperatures and involves the diffusion of nitrogen and carbon into the surface of carbon steel to give a somewhat harder case and soft core with a very thin compound layer on the surface.
The compound layer is wear and corrosion resistant and yet is not brittle, unlike its counterpart in the nitriding process. Since it provides an essential part of the properties required from the process it must not be removed by subsequent machining. Below the compound layer, the thin case significantly enhances the fatigue resistance of the component.