Several Questions About Brown Corundum

How to distinguish brown corundum specifications F, P, W

Many households call to indicate the clear idea of brown corundum, but ask him what kind of F, P, W sand three models, the brain is a mess, how are repeatedly unclear. So what in the end is F,P, W sand?F sand: F sand belongs to the ordinary brown corundum abrasive particle size: 4 mesh ~240 mesh Main use: casting, workpiece grinding and polishing, grinding wheel production, etc.P sand: and F sand production is not much, but the quality is better than F sand particle size: 8 mesh ~220 mesh main use: grinding and polishing of high-precision tools.W sand: belongs to the brown corundum micro powder series number: W1~W63 Main uses: such as ceramic products, fine workpieces, glass products and other grinding and polishing.

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Machine polishing is a polishing method that relies on the cutting performance of the abrasive and the plastic deformation of the surface layer to remove the convex part of the component so as to smooth the surface of the component. It mainly relies on manual operation, but for some special parts such as the surface of the rotary body, auxiliary tools such as the rotary table are needed. Some high-precision parts castings have very high requirements for the smoothness of the machine surface, and need to be processed by super finishing and polishing method.Super polishing polishing and general polishing process is different, is the use of brown corundum, white corundum abrasive characteristics of abrasive tools, in the abrasive polishing liquid containing abrasive pressed on the surface of the machined parts, high speedRotation, to carry out a polishing process. The polishing of advanced optical lenses is the use of super fine polishing process.

For the hardness of brown corundum abrasive, there is no clear and consistent definition in physics, which usually refers to the resistance of brown corundum to the invasion of foreign objects, and the main determination methods are characterization and pressing method.(1) The carving methodMohs hardness, the basis for the scratching of a material after the previous material; At this time refers to the use of other substances to characterize brown corundum, in order to calculate the Mohs hardness of brown corundum. With the research and application of new artificial hard materials, some substances are inserted between some standards to refine the Mohs hardness.(2) pressing methodThe resistance to the elastoplastic deformation of the object is a comprehensive mechanical performance index. With different indenter material, shape, expression method is different, there are different hardness, such as Brinell, Roxell, Vickers and so on;