Silicon-based series products also occupy a certain weight in the steelmaking and casting industries, in particular silicon carbide It has been widely used in actual production. Because the use cost of silicon carbide is low, the addition of silicon carbide particles can prevent the precipitation of carbides, increase the amount of ferrite, reduce the white mouth, make the cast iron structure dense, 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 an inoculant, silicon carbide is added to the burning package with molten iron in the form of crushed granules. It can effectively play the role of breeding treatment of thin-walled iron castings. The amount of silicon carbide added to cast iron is very small, which has little effect on the chemical composition of cast iron and great influence on its microstructure, so it can improve the mechanical properties of gray cast iron and have a significant impact on its physical properties.
silicon carbide The effect of the application
1. Silicon carbide applications can eliminate or reduce the tendency of white mouth;
2. Silicon carbide application to avoid supercooling structure;
3. The application of silicon carbide reduces the wall thickness sensitivity of iron castings, so that the difference in microstructure at the thin and thick sections of castings is small, and the difference in hardness is also small;
4. The application of silicon carbide is conducive to eutectic nucleation, which increases the number of eutectic clusters;
5. The application of silicon carbide makes the form of graphite in cast iron mainly fine and uniformly distributed A-type graphite, thereby improving the mechanical properties of cast iron.
6. Silicon carbide can reduce production costs and improve production efficiency.
From the above application effect, silicon carbide is indeed a good one Materials for casting, especially to reduce costs and improve the development efficiency of enterprises are of great help, but although silicon carbide balls are good materials, but reasonable adjustment of the use of silicon carbide is also a very difficult task. In the application process of many manufacturers, the grasp of the method is also very important.
