Silicon carbide and corundum abrasives on the characteristics and performance description

1, brown fused alumina:The main chemical composition AL2O3, the bauxite, iron and anthracite from melting in an electric arc furnace. Corundum abrasive color is brown, its color, the name corundum. The abrasive has a certain hardness and toughness, with the strong grinding ability, able to withstand great pressure. With a high temperature, anti-oxidation, anti-corrosion and chemical stability is good. High tensile strength as it applies to the grinding of the material tensile strength, suitable for general steel, high carbon steel, alloy steel, for the processing of hard wood, other abrasives can be used in substitution is insufficient, a universal Abrasive said, is the most widely used kind of abrasive.2, corundum:The main chemical composition of AL3O2 aluminum oxide powder as raw material in electric arc furnace melting together. Color is white, in terms of its color name corundum. Corundum corundum texture purer than brown. Using aluminum oxide powder material, corundum used by the Department of bauxite processing is made in advance, the main physical components (without grinding capacity) by arc melting from the converted. The conversion has strong grinding force.3, black silicon carbide:The main chemical composition of SiC. From petroleum coke, quartz sand, sawdust as raw materials in the resistor formed by the melting furnace. Black silicon carbide color is black, in terms of its color, named for the black silicon carbide. Black silicon carbide is brittle texture than corundum abrasive, hardness hard, its toughness is also inferior to corundum abrasive, than the end of the tensile strength of the material, such as non-metallic materials (various boards such as wooden plywood, particleboard, high school low-density fiberboard , bamboo board, calcium silicate board, leather, glass, ceramics, stone, etc.) and non-ferrous metals (aluminum, copper, lead) and other materials processing is particularly suitable for hard and brittle materials texture is ideal abrasive machining .4, green silicon carbide:The main chemical composition of SiC used in the manufacture of raw materials such as black silicon carbide plus industrial salt production are substantially the same as the reaction agent and accelerator reaction from the resistance furnace. Terms of their color is green so named for the green silicon carbide . green silicon carbide texture than the more pure black, green silicon carbide powder can be made, even higher hardness than black silicon carbide and silicon carbide which uses the same ground outside is more suitable for fine grinding of materials such as grinding thread, measuring tools, etc. in the grinding mill material is more widely used carbide, diamond products of the workpiece. Because green silicon carbide in the manufacturing cost is higher than the black silicon carbide, such as the use of raw materials is not the same on the ratio, plus a salt auxiliary materials as well as differences in processing power and so on, so green silicon carbide products cheaper than Black silicon carbide is higher. Therefore, the selection of green silicon carbide and silicon carbide in comparison, in the non-metallic and non-ferrous materials generally do not use green silicon carbide, green silicon carbide as the main choice and precision grinding carbide grinding, in belt and other coated abrasives green silicon carbide as grinding on the selection of materials for less.5, microcrystalline corundum:The main chemical components of AL2O3, used the same raw materials and corundum, only in the smelting process using rapid cooling process fine crystals obtained results. Fine crystalline corundum corundum mechanical strength than ordinary higher. Made with microcrystalline corundum abrasives commonly used for coarse grinding steel, high toughness titanium-nickel alloy steel and other difficult to grind materials, but rarely used in the manufacture of coated abrasives.