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What are the uses of silicon carbon alloys?

Date: 2022-07-14
Silicon carbon alloy is an alloy composed of silicon and carbon, also known as high carbon siliconHigh-carbon ferrosilicon is ferrosilicon with a large carbon content, and high-carbon ferrosilicon is often used in steelmaking furnaces. For example, as a new type of strong composite deoxidizer, it can also be used for general steel, alloy steel and special steel tempering. In addition, as a heating agent, it can also replace the traditional heating agent with higher price required in converter and open hearth steelmaking.
High-carbon ferrosilicon is a commonly used deoxidizer with the following advantages: no hydrogen source is generated during the deoxidation process, ensuring safety and reliability; carbon and silicon are important elements that determine the function of steel, and high-carbon ferrosilicon can not only react with oxygen in molten steel. To the deoxidation effect, the remaining carbon and silicon that have not been oxidized can also be dissolved in the molten steel to increase silicon and carbon, and achieve the effect of killing two birds with one stone. In order to obtain steel with qualified chemical composition and ensure the quality of steel, deoxidation should be carried out in steelmaking. The chemical affinity between silicon and oxygen is very large, so ferrosilicon is a strong deoxidizer in steelmaking for precipitation and diffusion deoxidation. Adding a certain amount of silicon to steel can significantly improve the strength, hardness and elasticity of steel.

What are the uses of silicon carbon alloys?
1. Silicon carbon alloy is suitable for deoxidation of various ordinary steels and castings, and increases silicon and carbon. It has rapid deoxidation, early slag formation, and strong reducing atmosphere, which effectively improves the element recovery rate, greatly reduces the smelting cost, and can make The quality of molten iron is stable, and it has refined grains, which can remove harmful impurities in molten iron, so that the casting temperature of molten iron is high, the quality of casting billet is good, and the cost is low.
2. Since the silicon-carbon alloy contains silicon and carbon, the silicon enters the molten iron during the smelting process, and most of the carbon burns. It is worth reminding that the main element of the composite additive is the high content of silicon carbide scrap, because the silicon carbide (sic) particles enter the casting to play the role of the core substrate, and form the core through it. The finer the silicon carbide particles, the more nuclei. The stronger the ability. Observation under TEM; the interface between the silicon carbide particles and the matrix is ​​effective, there are high-density dislocations around the particles, and the crystallization increases, so that the grains are refined, and the number of eutectic groups and the number of pearlite are significantly changed. Because of the strong nucleation ability of silicon carbon alloy, it can change the shape of graphite and refine the structure, thereby improving mechanical properties and preventing leakage, thus reducing the waste rate and the reflow rate.
3. The silicon carbide in the silicon carbon alloy decomposes at high temperature, and the carbon in the ionic state is easy to react with oxygen. They first reduce the oxidation of molten iron, and then become the crystallization core of graphite, so the gray iron casting graphite smelted by silicon carbon alloy is added. The organization is very good, it is inevitable, this is the direction of advanced gray iron smelting!

As a new type of metallurgical material, silicon carbon alloy has the lowest price in terms of price, but the effect is very good. It is the trend to replace traditional metallurgical materials in the future. It can effectively carry out slag discharge and deoxidation, and can also be used in the cast iron industry. The production of ductile iron is a very "affordable" ferroalloy product. Using silicon-carbon alloy for smelting can effectively improve product quality, reduce the cost of smelting, and improve the efficiency of manufacturers. It is a ferroalloy product with outstanding advantages.