Carburizing & Carbonitriding [ Return towards Automotive, Aeronautics & Transportation ]
During carburizing (carbonitriding) operations, carbon (and nitrogen) is brought to the surface of steel components and diffuses 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 CO/H2 atmosphere.
For nitriding, the N agent comes from ammonia cracking at the surface. Nitrogen accelerates the diffusion of carbon into the treated parts.
The ALNAT C 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.
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