18.01.2018
Special attention should be given to the abrasive material, after all with its help will be carried out grinding process.
In which areas are abrasive materials used?
Several centuries ago people used stones instead of abrasives.Such stones as garnet, flint, diamond, corundum and emery.
More often used corundum for metal processing. Grinding wheels made of corundum were invented by the method of polishing and honing. Stone served well for a day in the industry before materials with higher quality appeared. Today, natural corundum are no longer used.
Abrasives are made from two varieties of electrocorundum: white and normal. White is used for finishing and semi-finishing grinding operations. The stone is made of high quality aluminum, which is pre-treated in a furnace at high temperature. After that the metal is ground in a ball mill, separated and sieved. The result is a crystal-clear product that has increased resistance to deformation, acids and alkalis.
White electrocorundum used for grinding chilled, high carbon and high speed steel. Also it is widely used in the manufacture of ceramic and refractory parts. It can be used for the catalysts and special grinding machines. White corundum has higher processing speed and has not the ability to change the color of the material in the process. Due to the presence of iron oxide in its composition, it is perfect for sandblasting.
It is important to pay attention not only on the surface of electrocorundum. His grain size is also of paramount importance – it is a key factor for processing. According to this people choose the type of finish.
How to choose electrocorundum in grinding wheels?
The grains of white electrocorundum are solid and strong. This makes it possible to incorporate these substances without problems into blanks that consist of an alloy and have increased strength.
80% of the volume in the manufacture of abrasives is made up of powders, micropowders and grain of electrocorundum. High fire resistance, resistance to acids and alkalis, good thermal conductivity contributes to the fact that this stone is used in the manufacture of insulators, refractory and chemical products and ceramic components in electrovacuum devices. In addition, the scope of its application is constantly expanding.
Normal electrocorundum has excellent viscosity and has high strength, despite the fact that it's not too solid. Stone is used at changeable loads and high pressures. This is an ideal option for stripping steel and blanks - circles made of normal electrocorundum on an organic binder.
The grinding factor is considered to be the main aspect in abrasive processing.
Abrasives do not require special consumptions, because depreciation of the grinding wheels of white corundum and normal processing are negligible.
Foreign manufacturers recommend the use of grinding wheels on a ceramic bunch of white electrocorundum in finishing and semi-finishing processes There is another tip: replace the grinding wheels of white corundum for circles, which made of normal electrocorundum on ceramic bond.