Carburizing and carbonitriding
During carburizing (carbonitriding) operations, carbon and nitrogen is brought to the surface of steel components and diffused to produce a hard martensitic surface layer after quenching. Traditionally, the carbon comes from a hydrocarbon, natural gas or propane, partly oxidized in an endogas generator to produce a carbon/hydrogen atmosphere. For nitriding, the nitrogen agent comes from ammonia cracking at the surface. Nitrogen accelerates the diffusion of carbon into the treated parts. The ALNAT™ solution offers you an active and reproducible heat treatment under nitrogen and methanol. Either in a batch or in a continuous furnace, the methanol is cracked and represents the carbon agent, which is sprayed with nitrogen in the hot zone of the furnace, around 900°C for carburizing and 880°C for carbonitriding.
Our ALNAT™ solutions include bulk gas supply and a range of services related to the generation, use and control of atmospheres in industrial heat processing furnaces.