Applications of silicon carbide for casting:
1. Prevent the precipitation of carbides, increase the amount of ferrite, and reduce white spots;
2. Significantly improve the cutting performance and mechanical properties;
3. Increase fluidity, stabilize the composition of molten iron, and prevent segregation;
4. Reduce wall thickness sensitivity, make the structure dense and the cutting surface smooth;
5. Enhance graphite nucleation ability and increase graphite core;
6. For ductile iron, it is a powerful deoxidizer, which can reduce the amount of nodularizing agent added and improve the nodularizing rate;
7. Restore rusty scrap and alloys to reduce the cost of molten iron;
8. Eliminate the oxidation factors of molten iron, reduce furnace wall oxidation, and extend the life of the furnace wall by 30%;
9. Powerful deoxidation to purify molten iron.
How to use silicon carbide for casting:
The amount of silicon carbide added is based on the amount of silicon that can be absorbed by 1KG of silicon carbide in molten iron: 0.5KG
Calculation (absorption rate is about 90%), the specific situation is subject to the actual situation on site!
Once the amount of silicon added to a furnace of molten iron is calculated, it is easy to calculate the amount of silicon carbide needed.
If the process conditions permit, the molten iron should be overheated at 1550°C for 5 minutes for better absorption.
The adding method is basically the same as the adding method of carburizing agent. Tie the accurately weighed silicon carbide in a woven bag, put it into the molten iron in the furnace, and smelt the cover material, but the order is after adding the carburizing agent.
