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Abrasive hardness refers to the hardness of the selected abrasive (such as diamond, cubic boron nitride, white corundum, etc.). The hardness of the grinding wheel refers to the degree of difficulty for the particles on the surface of the grinding wheel to fall off the surface of the grinding wheel under the action of external force. The two are essentially different.
Answer
SG abrasive is sintered by a special seeding gel system developed by Saint-Gobain. It is a revolutionary new generation of alumina abrasive with high hardness, good toughness, and strong sharpness. Compared with ordinary corundum abrasives, SG has the advantages of high wear ratio, strong shape retention, good surface processing quality of the workpiece, small amount of grinding wheel dressing, and high grinding efficiency. SG grinding wheels are especially suitable for grinding aerospace alloys, tool steels, hardened workpieces, hard chromium, and hard cast iron. Because SG abrasives are more expensive, usually SG can be mixed with white corundum (or other corundum abrasives) in a certain proportion to make a grinding wheel according to the grinding requirements of different occasions to achieve the best combination of grinding effect and grinding wheel cost.
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