What role does silicon carbide play in cast iron?

Silicon based products also occupy a certain weight in steel-making and casting industries, especially silicon carbide is widely used in practical production. Because the use cost of silicon carbide is low, the addition of silicon carbide particles can prevent the precipitation of carbide, increase the amount of iron, reduce white cast iron, make the structure of cast iron compact, significantly improve the processing performance and make the cutting surface smooth.

After a large number of experiments, it is concluded that silicon carbide has become an important material in the production of gray cast iron. Generally, when silicon carbide is used as inoculant, silicon carbide is added to the ladle with molten iron in the form of broken particles. It can effectively play the role of inoculation treatment of thin-walled iron castings.

The use of silicon carbide in cast iron has little effect on the chemical composition of cast iron, but has a great effect on its microstructure. Therefore, it can improve the mechanical properties of gray cast iron and have an obvious effect on its physical properties.

Application effect of silicon carbide

1. The application of silicon carbide can eliminate or reduce the tendency of white mouth;

2. Application of silicon carbide to avoid undercooling structure;

3. The application of silicon carbide reduces the sensitivity of wall thickness of iron castings, so that the difference of microstructure and hardness between thin and thick sections of castings is small;

4. The application of silicon carbide is conducive to the nucleation of eutectic clusters and increase the number of eutectic clusters;

5. The application of silicon carbide makes the graphite in cast iron mainly fine and evenly distributed type a graphite, so as to improve the mechanical properties of cast iron.

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

From the above application results, silicon carbide is indeed a good casting material, especially in reducing costs and improving enterprise development benefits. However, although silicon carbide ball is a good material, it is also a difficult task to reasonably adjust and use silicon carbide. In the application process of many manufacturers, the grasp of methods is also very important.

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