Aluminium Oxide Straight Cup Grinding Wheel Pink
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pink fused alumina is white fused alumina with chrome oxide (under 0.5% cr2o3) has been added in the fusion process to produce a grain that is slightly tougher than regular white fused alumina used for grinding unhardened high alloy steels. If more chrome oxide (about 3% cr2o3) has been added to, it will get ruby fused alumina, which provides additional toughness over pink fused alumina. the raw material and refining work of pink aluminum oxide are basically the same as white aluminum oxide. They are both needed to add cr203 and well mixed to be refined as abrasives with rose red color. Its hardness is close to white corundum, and the roughness is higher than white aluminum oxide. It is suitable for grinding knifes, measuring tools, meters, screw etc. That require low roughness. most grinding wheels are made with vitrified bonds, which consist of a mixture of carefully selected clays. At the high temperatures produced in the kilns where grinding wheels are made, the clays and the abrasive grain fuse into a molten glass condition. During cooling, the glass forms a span that attaches each grain to its neighbor and supports the grains while they grind.
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