Methods for oxidation treatment of CBN abrasive particle and for preparation of ceramic binder CBN grinding tool by using CBN abrasive particle
A vitrified bond and oxidation treatment technology, used in the preparation of abrasive tools and abrasives, can solve the problems of low bending strength of grinding wheels, achieve uniform microstructure, avoid burns, and reduce friction coefficient.
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Embodiment 4
[0020] Taking embodiment 4 as an example, the specific implementation process of the CBN abrasive grain surface oxidation process of the present invention is:
[0021] Put 120μm CBN abrasive grains in a corundum crucible, and shake the crucible to make it evenly distributed and loosely piled up. The specific requirement is that the piled up area should be large (greater than 100cm 2 ), the accumulation height is low (less than 5mm), so that the abrasive grains are heated evenly and the surface of the abrasive grains is fully oxidized. Place the crucible in a high-temperature air furnace, raise the temperature to 950°C at a rate of 3°C / min and keep it warm for 60 minutes, then cool down to room temperature with the furnace; pour the heat-treated CBN abrasive into a mortar and grind it carefully to make it The surface adhesion of CBN abrasive grains caused by oxidation is opened to obtain fully oxidized CBN abrasive grains.
[0022] Mix 80% of oxidized abrasive grains with 20% ...
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