Violet Fused Alumina: Cost-Effective Materials with Similar Toughness of Single Crystal Alumina
We know that pink fused alumina is made by using alumina as the main raw material, adding a certain proportion of chromium oxide, and smelting it in an electric arc furnace at high temperature. Its toughness value is greatly improved due to the addition of chromium oxide. When another element is added to the smelting of chromium corundum, the toughness value of the abrasive will be significantly improved, reaching a toughness value close to that of single crystal alumina. This element is titanium.
During the smelting process, the addition of titanium ions causes corundum lattice distortion, which improves the ability of corundum crystals to resist external impact, and the color of the crystals becomes approximately purple-blue. So we name this material by its appearance: Violet Fused Alumina (VA).
VA has a violet color appearance and great hardness and toughness. Its good impact resistance and sharp cutting edge make the grinding performance far superior to white fused alumina and pink fused alumina, which is similar to single crystal fused alumina.
The grinding tools made of violet fused alumina have good self-sharpening, strong grinding force, less heat generation, excellent shape retention, less correction times and long service life. It is suitable for hard and tough metal materials, such as stainless steel, high vanadium high-speed steel, heat-resistant alloy steel, heat-sensitive steel and workpieces that are easy to deform and burn. It is also suitable for precision grinding and forming mill of various tools, gauges and instrument parts. Considering the cost of Violet abrasives, it is recommended for the grinding of heat-resistant alloy steel, heat-sensitive steel, and difficult-to-grind metal materials.
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