Red corundum, brown corundum and white corundum all belong to artificial corundum. People often ask, what is the difference between them?
1.From the perspective of hardness and toughness:
Toughness: brown corundum >red corundum >white corundum.
In addition to high hardness, white corundum will not bring in color when grinding, especially suitable for grinding some metal products with high requirements. Brown corundum is the most common corundum series grinding sand. Red corundum is in between.
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Brown corundum: tan, high hardness, toughness, cheap. Grinding carbon steel, alloy steel, malleable cast iron, hard bronze, etc.
White corundum: white, with higher hardness and lower toughness than brown corundum. Grinding hardened steel, high speed steel, high carbon steel, etc.
Red corundum: rose red or purple, higher toughness than white corundum. Grinding measuring tools, instrument parts and low-roughness surface processing.
2.From the point of view of use：
White corundum: It has a strong cutting force and is used to remove metal or non-metal burrs, etc., and has a brightening effect on the surface grinding of parts. It belongs to medium polishing abrasives;It is suitable for the manufacture of ceramics, resin bonded abrasives, grinding, polishing, sandblasting, precision casting (corundum for precision casting), etc. It can also be used to manufacture advanced refractory materials.
Brown corundum: Mainly used in the removal of burrs on the surface of stainless steel, carbon steel, aluminum alloy and other hardware parts. The grinding of brown corundum is less delicate and brighter than that of white corundum.
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Red corundum: The main component of red corundum is α-alumina, also called chrome corundum and ruby. Now the market is mostly artificial red corundum.The abrasive tools manufactured with it are suitable for grinding high-carbon steel, high-speed steel and its thin-walled parts.
