QUALITY  

Carburizing (Cementation)

Carburizing, one of the oldest surface hardening treatment is based on diffusion of carbon from the surface toward the interior of steel part which has low carbon content in solid, liquid and gaseous media. The pieces, heated up to austenizing temperature(850-950^o C) are held at high temparature depending on required effective hardness depth and quenched in suitable media like water, oil, salt or polimer. As all other steels after quenching stress relieving and tempering is being performed. After these applications, carburizing provides a layer with high carbon content and high wear resistance at surface and tough structure at core.

In TAMÇELİK apart from salt bath carburizing, gas carburizing is being performed in CODERE gas atmosphere furnace. Carburizing is performing in gas atmosphere and quenching is done in salt bath which can heated up to 450^o C. When carburizing process is finished furnace bell moves to over the salt quenching tank and quenching tank elevator draws the charge salt quenching.
During the transfers to prevent oxidation of parts nitrogene is purged. Furnace entirely computer assisted. Furnace has high uniformity of temperature (± 5^o C) and carbon potential (± 0.05 % C). After the treatments, less distortion, less allowance for machining, homogeneous hardness is gained.