Green silicon carbide is made of petroleum coke and high-quality silica as the main raw materials, adding salt as an additive, and smelting at high temperature in a resistance furnace. The hardness of the smelted green silicon carbide crystal is between corundum and diamond, and the mechanical strength is higher than that of corundum. Green silicon carbide powder is green, with crystal structure, high hardness, strong cutting ability, stable chemical properties and good thermal conductivity.
Green silicon carbide is suitable for grinding hard alloys and hard and brittle metals and non-metallic materials, such as non-ferrous metals such as copper, brass, aluminum and magnesium and precious stones, optical glass, ceramics and other non-metallic materials. Green silicon carbide grinding wheel is a porous body made by adding binder to abrasive, compacting, drying and calcining. Green silicon carbide grinding wheel applications include: grinding materials including cast iron, non-ferrous metals, mild steel, hard steel, 300 (or 400) series stainless steel, tool or high speed steel, malleable cast steel, (AlNiCo) magnetic steel, Brass, chrome plate, etc.
The advantages of green silicon carbide grinding wheels are sharp abrasive grains and high hardness, which can grind hard and brittle materials such as cemented carbide, optical glass, ceramics, and alloys. And its thermal conductivity is good, suitable for grinding workpieces that are easily deformed by heat. However, the green silicon carbide grinding wheel also has the disadvantage that it is more brittle, so the edges and corners are poor, and it is not suitable for processing workpieces with greater toughness.
Green silicon carbide production process:
The green silicon carbide manufacturing method is the same as that of black silicon carbide, but the raw materials used have higher purity requirements, and are also formed at a high temperature of about 2200°C in a resistance furnace. The content of Sic is higher than that of black, and its physical properties are similar to that of black silicon carbide, but its performance is slightly more brittle than black, and it also has better thermal conductivity and semiconductor properties.
