Carbonitriding is a case hardening process similar to carburizing, with the addition of nitrogen, used to increase wear resistance and surface hardness. Compared to carburizing, the diffusion of both carbon and nitrogen increases the hardenability of plain carbon and low alloy steels.
Typical applications include:
- gears and shafts
- rollers and bearings
- levers in hydraulic, pneumatic and mechanical actuated systems.
Ipsen's low pressure carbonitriding (AvaC-N) process uses acetylene and ammonia. Like carburizing, the resulting part has a hard, wear-resistant case. However, unlike AvaC carburizing, the resulting nitrogen and carbon case depth is between 0.003" and 0.030". Since nitrogen increases the hardenability of steel, this process produces parts with increased hardness within the indicated case depth. Since carbonitriding is performed at slightly lower temperatures than carburizing, it also reduces distortion from quenching. Read more about AvaC here.