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                        Company News Industry News

                        The Role of Silicon in Casting

                        2024-06-07
                        1. The role of silicon in promoting graphitization in cast iron
                        In cast iron, silicon is a strong alloying element that promotes graphitization, and its ability to promote graphitization is 3 times that of nickel and 5 times that of copper. And whether in liquid or solid cast iron, the combination of silicon and iron is stronger than carbon.

                        2. The solid solution strengthening effect of silicon in ferrite
                        In solid cast iron, almost all silicon dissolves in austenite and ferrite, and does not enter carbides. Silicon atoms and iron atoms can be combined into silicon-containing ferrite with strong covalent bonds, which not only promotes the formation of ferrite, but also strengthens the ferrite.

                        3. Silicon dissolved in liquid cast iron greatly enhances the oxidation resistance of molten iron, and silicon can also reduce the solubility of nitrogen in molten iron. Among various casting alloys, only cast iron can be smelted in an oxygen-rich and nitrogen-rich atmosphere with melting equipment such as cupolas and oxygen rotary furnaces. It is precisely because of this effect of silicon.

                        4. Increasing the silicon content in cast iron to more than 3.5%, the oxidation resistance and thermal growth resistance of cast iron are greatly improved. In the early days, there were silicon-based heat-resistant cast iron grades in the standards of heat-resistant cast iron in various countries. In recent years, due to the consideration of energy saving, various internal combustion engines have increased the temperature of exhaust gas. In the automobile industry of various countries, the application of heat-resistant silicon-molybdenum ductile iron castings has been attached great importance.


                        ABOUT  KEVA
                        Keva Casting is a professional casting company that focuses on Construction, Machinery, Automobile, Hardware, Pipeline and many other industries.
                        We provide top quality products with the best service based on our complete production chain including our own mold design, advanced production techniques, and full management of the supply chain. Keva Casting has two factories located in Zhucheng, China's Shandong province.
                        We use "shell molding", which is a new technique that has been developed in recent years.This new technique has simplified production procedures and reduced air pollution compared with traditional sand casting and investment casting. Shell making and core making are faster to ensure production in enormous quantities. The dimensions and surface finishing are satisfactory for all kinds of industrial requirements. Besides supplying our own formwork & scaffolding systems, our casting products also supply OEM services in various industries.

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