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Grinding wheel quenching

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Why should water be cooled frequently when grinding a high hardness tool that has been quenched and tempered on a grinding wheel?7″ cut off disc for stainless steel
Cutting is a physical movement. Narrowly defined cutting refers to cutting objects (such as food, wood, and other objects with low hardness) with a sharp tool such as a knife; generalized cutting refers to the use of tools, such as machine tools, flames, etc., to make objects under pressure or high temperature. Disconnected.7″ cut off disc for stainless steel
The grinding wheel spindle is overheated because the gap between the main shaft and the bearing is too small, there is debris between the bearings, the bearing is worn, the lubricating oil is not enough or leaks, and the lubricating oil is used incorrectly, which makes the bearing lubrication poor.
High-hardness tools after quenching and tempering produce high temperatures during grinding, often using water cooling to prevent workpiece annealing. For example, we grind white steel cutters on the grinding wheel, and if it is not water-cooled for a long time, the white steel cutter will produce an annealing phenomenon (feeling like burning) and lose the hardness, and the cutting work cannot be completed. Grinding for a while, cooling in water, is also a quenching process to maintain the hardness of white steel. Carbide-like tools or cutting tools are not allowed to be cooled by water during grinding. Therefore, the hard alloy has good red hardness and will not be annealed at high temperatures. Conversely, if water is continuously used during grinding, the cemented carbide will break due to the large internal and external temperature difference, causing damage.
Steel tools generate a lot of heat during grinding. If they are not cooled, the hardness and rigidity of the product will decrease, which will affect the quality and service life of the product. Using water cooling to lower the workpiece temperature maintains workpiece performance.
Cemented carbide materials are resistant to high temperatures and are brittle. In the case of quenching and rapid heat, the product may crack.

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