[Abrasive Class] Active Filler Conducive to Grinding (Serial 3)

Source: National Abrasive Quality Inspection NAQS

As a raw material for resin abrasive tools, in addition to abrasives, resins and hardeners, in order to improve certain properties of bonding agents or abrasive tools (such as strength, hardness, heat resistance, conductivity, surface quality, etc.), improve manufacturing processes and processing processes, it is sometimes necessary to add an appropriate amount of auxiliary materials. Fillers are also called fillers and generally refer to materials added to binders or molding materials as components to change the performance of the binder or reduce costs.

When the grinding wheel is dry grinding, there is sulfur or halogen vapor at the grinding place, which will break the chemical bonds of the steel, thus greatly improving the ability to grind the steel.

In some adhesives, metals containing low melting points melt the steel body in addition to increased grinding pressure and speed. It is also beneficial to combine low melting point metals with adhesives. The best formula for resin grinding wheels for dry grinding of steel is always a halogen or sulfur supplier.

When grinding stainless steel and alloy steel, chemically active filler is very important; for carbon steel is not very important, and when grinding non-metal, chemical active filler has no superiority.

Natural cryolite and pyrite

The chemical expression of natural cryolite is Na3AlF6 Cryolite powder is first used as a reinforcing material to improve the strength of abrasive tools. Furthermore, it is found that due to the low melting point of cryolite, the melting of cryolite during the grinding process causes the abrasive particles to fall off easily to prevent the blockage of the grinding wheel. In addition, melted cryolite can play a lubricating role in grinding; and it precipitates fluorine, which is beneficial to the grinding of steel, so cryolite powder is suitable for dry grinding wheels without coolant when grinding. Practice has proved that cryolite powder is not as reinforcing as hemihydrate gypsum powder for manufacturing ordinary grinding wheels, and its addition amount is generally 1.5-5%.