Silicon carbide has high hardness and can be prepared into various grinding wheels, sandpapers and abrasives, and is mainly used in the machining industry. Silicon carbide has a Mohs hardness of 9.2 to 9.6, second only to diamond and boron carbide, and is a commonly used abrasive. The chemical composition of silicon carbide abrasive includes silicon carbide, free carbon and Fe2O3. The chemical composition of the abrasive is shown in Table 2. The higher the content of silicon carbide, the better its hardness and grinding performance. my country's industrial silicon carbide is mainly used as abrasive. Abrasives are widely used in industry, especially for processing high-precision parts or very hard parts. Abrasives are indispensable.
For the sharpening of knives and the cutting of hard materials, the grinding wheel is also an indispensable tool. Silicon carbide grinding wheel is a round consolidated abrasive tool with a through hole in the center made of abrasives and bond resins. It is the most used in molds. The main components of silicon carbide are black silicon carbide (alpha phase) and green silicon carbide (beta phase). Black silicon carbide has lower hardness than green silicon carbide, and is used to grind materials with lower hardness, such as cast iron and non-metallic materials; green silicon carbide is suitable for grinding cemented carbide, optical glass, carbon alloys and the like. There is also a cubic silicon carbide dedicated to superfinishing of miniature bearings. Among other abrasives of the same particle size, cubic silicon carbide has the highest processing efficiency.