What's The Function Of Carbon Additive

Jun 03, 2026

A carbon additive is a carbon-containing substance added to compensate for the carbon loss during steelmaking.

During the steelmaking process, due to the long smelting and holding times, the carbon content in the molten iron may be significantly reduced, falling short of the theoretically expected carbon value. To compensate for this carbon loss, a carbon additive is added.

The main functions of a carbon additive are:

1. Compensating for the carbon loss during steelmaking, increasing the carbon content in the molten iron.

2. Enhancing the nucleation ability of the molten iron, refining grains, and improving the tensile strength, hardness, wear resistance, and fatigue limit of castings.

3. Improving the distribution of carbon and alloying elements in the casting metal, resulting in a denser, more uniform microstructure and eliminating segregation during casting.

4. Reducing slag production, simplifying slag removal operations, and improving casting efficiency.

5. Improving the fluidity of the molten metal, stabilizing the composition of the molten iron, and preventing segregation.

6. After use, it can significantly reduce white cast iron formation, improve machinability, and enhance mechanical properties.

 

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