the important role of silicon carbide in cast iron

The cost of using silicon carbide is low. The addition of silicon carbide particles can prevent carbide precipitation, increase the amount of ferrite, reduce white spots, make the structure of cast iron dense, greatly improve the processing performance, and make the cutting surface smooth; especially in smelting, it increases the graphite core, increases the number of graphite nodules in the ladle, improves the morphology of graphite in gray iron, etc., all of which are very useful; After a lot of experimentation, it was concluded that silicon carbide had become an important material in the production of gray cast iron. Usually, when silicon carbide is used as an inoculant, silicon carbide is added to the calcined ladle along with molten iron in the form of granules, which can effectively inoculate thin-walled iron castings.


The role of silicon carbide in cast iron:

1. The use of silicon carbide can eliminate or reduce the tendency to form white lips;

2. The use of silicon carbide should exclude overcooling of the structure;

3. The application of silicon carbide reduces the sensitivity to wall thickness of cast iron parts, making the difference in microstructure and hardness between thin and thick sections of casting small;

4. The use of silicon carbide promotes the nucleation of eutectic clusters and increases the number of eutectic clusters;

5. The application of silicon carbide makes the shape of graphite in cast iron predominantly fine, and evenly distributes A-type graphite, thereby improving the mechanical properties of cast iron.

6. Silicon carbide can reduce production costs and improve production efficiency.