The following briefly introduces several commonly used grinding wheel abrasives

1. Chromium corundum: The hardness of chromium corundum is similar to that of white corundum and its toughness is better (between brown corundum and white corundum), so the durability and grinding efficiency of the grinding wheel are higher than that of white corundum. At the same time, after dressing, the contour of the abrasive cutting edge on the surface of the grinding wheel can be maintained for a long time (that is, the abrasive cutting edge is on the same circumferential end plane), so under the same conditions. The surface finish of the workpiece ground with chromium corundum grinding wheel is slightly higher than that with white corundum grinding wheel. Due to the above characteristics, chromium corundum is suitable for grinding various hardened high-strength steels and measuring tools and instrument parts with high finish requirements. In addition, It is suitable for profile grinding and sharpening of knives. The price of chrome steel jade is relatively high, so it is only suitable for fine grinding.

2. Single crystal corundum (GD) and microcrystalline corundum (GW) single crystal corundum has high hardness and toughness, and it is good at resisting breakage during grinding. Used for grinding stainless steel and high-temperature high-speed steel with greater toughness. The effect is better when the steel with high hardness, the strength of microcrystalline corundum is high, the toughness is good, the self-sharpening is better than that of single crystal corundum, and it is suitable for grinding stainless steel. Bearing steel and special nodular cast iron can also be used for high-finish grinding.

3. Black silicon carbide The color of this kind of abrasive is black, some are dark blue, and the ceramic bond grinding wheel manufactured is also black. The hardness of black silicon carbide is higher than that of any kind of corundum. The abrasive grains are sharp, but the toughness is low and fragile. It cannot withstand the cutting pressure of tough materials, so it is suitable for grinding materials with low tensile strength or soft Material.

4. Green silicon carbide The color is green, and the ceramic bond grinding wheel made with it is also green. The hardness of green silicon carbide is the same as that of black silicon carbide, but it is more brittle and is mainly used for grinding cemented carbide. Brittle materials such as optical glass.

5. Diamond has higher hardness than other abrasives. It is the hardest material among known materials. It has excellent cutting performance, but it is expensive. It is mainly used to process high-hardness materials that are difficult to process with other abrasives. The grinding wheel made with this kind of abrasive is called the diamond grinding wheel. It has many different characteristics from the grinding wheel made with corundum and silicon carbide abrasives.