Silicon carbide is increasingly becoming a casting method and still requires certain smelting materials. Not all silicon carbides are suitable for casting methods. When purchasing silicon carbide, special casting silicon carbide should be purchased according to the requirements of the produced products. Product selection, such as cast silicon carbide used when casting grey iron, ductile iron, and graphite cast iron, varies.
The most widely used cast silicon carbide is 70# silicon carbide, 88# silicon carbide, and 90# silicon carbide. When casting, according to the control of the product, different grades of cast silicon carbide can produce different chemical responses and effects. Casting products of different quality, when the temperature is lower than 1620 ℃, the carbon in the cast silicon carbide will act as a deoxidizer, so that less fixed oxides such as iron oxide and manganese oxide are reduced by chemical response, When the temperature is higher than 1620 ℃ (such as smelting), the silicon in the silicon carbide will undertake all the deoxidation tasks, while the carbon acts as a recarburizer, and its yield can reach 100%.
Casting silicon carbide plays a crucial role in the casting process. The old casting drivers are also familiar with the use of 70# silicon carbide, 88# silicon carbide and 90# silicon carbide in the casting process, which can often greatly reduce the phenomenon of casting white mouth, and It improves the fluidity of molten iron and reduces the casting time. Casting silicon carbide also has the characteristics of pre-inoculation. In the production method of ductile iron, selecting 70# silicon carbide, 88# silicon carbide and 90# silicon carbide can often promote At the beginning of graphitization, changing the distribution of graphite can effectively update the product quality of iterative cast iron.
Cast silicon carbide plays an indispensable role in the casting production method. Common cast silicon carbide is 70# silicon carbide, 88# silicon carbide, 90# silicon carbide, and the cast silicon carbide grades are selected while making different casting products. It is not the same, by applying the proper and correct cast silicon carbide products can better produce high quality cast products!