Some are often used in the glass blasting industry Brown corundumAbrasives, what are the requirements of these industries for the quality of brown corundum abrasives?
Sandblasting is actually high-pressure jet cleaning, using the method of compressed air as power, spraying abrasives to the surface of the workpiece for processing, called sandblasting. In various surface treatment methods, the effect of sandblasting is thorough, and its adaptability is widely used, because cleaning the surface of steel is the fastest and most thorough; Sandblasting brown corundum can clean surfaces that are usually difficult to clean, and there are special tools that can clean the inner surface of pipes, and the cost of sandblasting is also the lowest.
Hardness is the basic requirement for sandblasting, alumina gives brown corundum abrasives hardness and high melting point, while the presence of trace amounts of magnetic matter gives brown corundum toughness or crushing resistance. Glass sandblasted brown corundum not only requires hardness, the mixing ratio of silica and titanium dioxide in the glass phase, theoretically close to 1:1, too much silica, excess silica can not be left in the glass phase, it reacts with a part of alumina to form mullite to reduce the toughness of brown corundum.
Excess titanium oxide (TiO2) in brown corundum cannot be retained in the glass phase and reacts with alumina to form aluminum titanate. It causes weakening of the glass phase between the α-alumina grains. The difference in the coefficient of thermal expansion between the three phases can also cause cracks between the grains during the heating process.
It is also important to remind everyone that when using different processes of sandblasting, consider the use of brown corundum abrasives with different grain sizes.
Sandblasting abrasives under different process requirements, choose different abrasives, generally use 18-24 purposes can be, if you need roughness, choose brown corundum with large particles, if you need flatness, choose brown corundum with small particles. The larger the mesh, the finer the granularity. Sandblasted brown corundum abrasive products have moderate hardness and high bulk density, and no free silica. Brown corundum products have high grinding efficiency, wear resistance and high temperature resistance and other characteristics, the quality of the product reliability performance is stable, is the production of abrasives abrasives, refractory materials and wear-resistant materials of a better product choice.