At our company, Ipsen tunnel furnaces are used for cementation, nitriding, carburizing, and hardening.
Dimensions: 900 × 620 × 450 mm, load weight 400 kg
CEMENTATION is the hardening of the surface of steel by means of carbon at high temperatures.
NITRIDING is the thermochemical treatment of steel. It is used to enrich the surface of steel with nitrogen. The main purpose of nitriding is to increase the hardness of the surface. It makes steel more resistant to wear and tear and the rebound (dynamic) strength also significantly increases. The best effect is reached with special steel for nitriding which contains Mo, Al, and V. The corrosion resistance of the majority of steel types also increases, with the exception of stainless steel.
CARBONITRIDING is a process in which the product undergoes nitriding and cementation at the same time. Annealing takes place at temperatures between 700 and 800°C in media that contain carbon and nitrogen. These may be gases (NH3 + CO) or cyanide, chloride, and carbonate salt baths. After annealing, the products are hardened in the same way as during cementation. The results of carbonitriding depend on the temperature. At higher temperatures (800 to 830°C), cementation is more intense. At lower temperatures (700 to 800°C), nitriding is more distinct, so the achieved hardness is higher and the depth of hardness is shallower. In the second case, hardening takes place at lower temperatures and in milder cooling agents.