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Characteristics Of Cbn Grinding Wheel And Diamond Grinding Wheel
CBN grinding wheel (cubic boron nitride) is mainly used for grinding hard and tough materials, and cannot replace diamond SDC grinding wheel for grinding cemented carbide and nonmetallic hard materials. When grinding, you can only choose oily coolant instead of water-based coolant. Because, at high grinding temperature, CBN will react chemically when it meets the alkaline aqueous solution, the CBN grinding wheel will decompose in the alkaline solution at 300℃ and can decompose slightly in boiling water, which will destroy the crystal shape of abrasive particles.
SDC grinding wheel (diamond) will not stick chips when grinding and cutting ferrous materials, and it is the most ideal grinding wheel for grinding hardened steel, high vanadium high-speed steel, aluminum high-speed steel, and other metal materials which are sensitive to grinding temperature.
Differences Between CBN Grinding Wheel And Diamond Grinding Wheel
Different heat resistance:
CBN grinding wheel (cubic boron nitride) can withstand high-temperature of 1250-1350 degrees Celsius.
SDC grinding wheel (diamond) can resist heat up to 800 degrees Celsius.
CBN grinding wheel is mainly used to process hard and tough materials, especially ferrous metals, such as various steel parts, cast iron, etc. Workpieces: automobile parts-crankshaft, camshaft, hydraulic parts, compressor parts, etc.
SDC grinding wheel is mainly used to process hard and brittle materials, such as cemented carbide, ceramics, glass, and other workpieces.
In terms of production cost, the price of the CBN grinding wheel is much higher than that of SDC grinding wheel, and the diamond grinding wheel is better than the CBN grinding wheel if the workpiece is allowed.
In a word, the CBN grinding wheel and SDC grinding wheel belong to superhard grinding wheels, and their application scope plays a complementary role, and their abrasive toughness, hardness, and durability are dozens of times that of corundum grinding wheels. The actual selection still needs to be considered according to the equipment, workpiece, processing method, operation, and actual demand!