How to Make Cementite?

Cementite can be made directly from Hägg carbide through the reaction Fe+Fe₂C\rightarrow Fe₃C (Hofer:1950). Alternatively, powdered cementite can be made by heating Hägg carbide, which is richer in carbon, in a nitrogen stream at 800°C for some 20 min (Herbstein:1964).

How is cementite made?

Cementite forms directly from the melt in the case of white cast iron. In carbon steel, cementite precipitates from austenite as austenite transforms to ferrite on slow cooling, or from martensite during tempering.

What is the uses of cementite?

Cementite plays a vital role in metallurgy. When immersed in a solution of 1%–3% sodium chloride, its corrosion resistance increases significantly. Cementite is also known as iron carbide.