Similar to carburizing, Carbonitriding introduces ammonia as well as carbon into the furnace atmosphere for hardening steel. This process for case hardening steel results in a harder surface, typically used for parts made from low hardenability materials.
CST performs carbonitriding in either their batch or pit furnaces, depending on part size or quantity. Our batch line includes five integral quench units, one of which is set up with hot oil for reducing quench induced distortion. We also have two pit furnaces for long, slender part applications up to 122 inches.
The key to quality carbonitriding is atmosphere composition and temperature control, which we achieve by using a computerized system, infra-red three gas analyzer and insitu oxygen probes for each furnace.
For small screw machine parts and stampings where a hard wear resistant surface is required, along with core strength, carbonitriding is typically specified. This produces a file hard surface with case depths from 0.005 to 0.035in. deep.
Please click to request more information about CST’s carbonitriding service.