silicon carbide for casting

Silicon carbide for casting is a silicon-based nucleating agent. According to SiC+Fe=FeSi+C (non-equilibrium graphite), it melts in molten iron, where Si and Fe in SiC Combined, the remaining C is non-equilibrium graphite, as the core of graphite precipitation.Gray cast iron, ductile iron and malleable cast iron all use the reaction of SiC+FeO=Si+Fe+CO to reduce the content of FeO and MnO in the slag, thereby purifying the molten iron and reducing The furnace wall is oxidized to extend the life of the furnace wall, and silicon carbide can achieve the purpose of increasing silicon and carbon.

Silicon carbide as an additive for casting is a material with the reputation of "rich core". , it reduces the tendency of castings to whiten, enhances the graphite nucleation ability and increases the graphite nucleation center, and obtains a moderate number of eutectic clusters. The graphite shape and distribution that meet the requirements, after the application of the synthetic cast iron melting process, when the proportion of scrap steel in the charge is too high and the number of cores in the molten iron is too small, the nucleation effect of silicon carbide can play a key role.

In recent years, silicon carbide has been used more in casting production. According to the use of oneself and others, the effect is relatively good, especially in smelting, increasing the graphite core, increasing the number of graphite balls of ductile iron, and improving the graphite form of gray iron,which make silicon carbide for casting very beneficial.

Instructions: The amount of silicon carbide added is calculated based on the amount of silicon that can be absorbed by 1KG in the molten iron is 0.5kg (absorption rate is about 90%). The amount of silicon added in a furnace of molten iron is calculated, and it is easy to calculate the need for silicon carbide. The method of adding is basically the same as that of adding recais added after the recarburizer.

Advantages of Silicon Carbide for Casting: 

1. Prevent the precipitation of carbides, increase the amount of ferrite, and reduce white mouth. 

2. Significantly improve the cutting ability and mechanical properties. 

3. Increase fluidity, stabilize the composition of molten iron, and prevent segregation.

4. Reduce the wall thickness sensitivity, make the tissue dense, and the cutting surface smooth. 

5. Enhance graphite nucleation ability and increase graphite core. 

6. For spheroidal graphite cast iron, it is a powerful deoxidizer, which can reduce the amount of spheroidizing agent and increase the spheroidization rate. 

7. Reduce the rusted waste and alloys to reduce the cost of molten iron. 

8. Eliminate the oxidation factor of molten iron, reduce the oxidation of the furnace wall, and extend the life of the furnace wall by 30% 

9. Powerful deoxidation to purify molten iron.

Anyang Huatuo Metallurgy can supply the silicon carbide in different particle size, such as 1-10mm for steelmaking, 0.1-0.5mm silicon carbide for casting,200mesh for abrasive etc, if any confused please contact us, we will try our best to provide the help.