What are the advantages of silicon carbon alloy? Let's introduce:
Using silicon carbon alloy to treat the raw molten iron of nodular iron can obviously change the crystallization characteristics of molten iron, reduce the tendency of white mouth and eliminate the anti white mouth. The formation of white mouth tendency and anti white mouth is related to the nucleation ability of graphite. It can be considered that silicon carbon alloy plays an important role in the treatment of raw molten iron. After post inoculation treatment, the use of silicon carbon alloy is weakened, which may be because the graphitization of post inoculation overlaps with the use of silicon carbon alloy. Nevertheless, it can be predicted that silicon carbon alloy treatment will weaken the dependence between solidification structure and post inoculation treatment, and improve the stability of microstructure and properties. Silicon carbon alloy is different from ferrosilicon. Silicon carbon alloy has a high melting point. Instead of melting in molten iron, it melts slowly. In the melting process, silicon atoms and carbon atoms are provided to the surrounding liquid phase from time to time. When silicon carbon alloy melts in molten iron, it forms all kinds of fine graphite particles around it. Although these graphite particles will melt again, they form all kinds of carbon atom groups, which are the basis of graphite nucleation later.
Silicon carbon alloy can refine grains, improve strength, enhance toughness and prevent leakage, so the garbage rate and reflow rate are reduced. At the same time, silicon carbon alloy is easy to use, packaged in bags and easy to keep. It is easy to master the application amount, so that more scrap can be added to obtain ideal castings. Silicon carbon alloy can also replace No. 75 ferrosilicon, reduce the amount of carburizing agent and reduce the casting cost.
