Cementation or carburization is the oldest surface hardening process; It is based on diffusing (impregnating) carbon on the surface of steel material with a low carbon content (0.1-0.2%) in a solid, liquid or gas environment.

After carburizing, the parts can be cooled in oil, polymer, hot salt bath or pressurized gas environment depending on the section thickness and geometry of the material. After this rapid cooling, a hard structure resistant to abrasion is formed on the carbon-enriched surface of the material, while the core remains soft and tough.

The most widely used cementation process all over the world finds applications in many different areas from small parts to large gears.

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