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To enhance the friction and wear performance of cemented carbide, textured microholes were machined on micro Electron Discharge Machining (EDM) on the tool rake face, and Calcium Fluoride (CaF₂) powders were burnished into the microholes. The friction and wear characteristics of the microhole-textured tool filled with CaF₂ were investigated using sliding friction tests and dry cutting tests. Results exhibited that the working temperature could affect the tribological performance of the microhole-textured tool filled with CaF₂ due to the temperature-sensitive nature of CaF₂. There is no obvious lubrication effect for the textured tool filled with CaF₂ at room temperature, while it was shown to be more effective in improving tribological property at a cutting speed of higher than 100 m/min with a corresponding to cutting temperature of 450 °C. The possible mechanisms for the microhole-textured tool filled with CaF₂ were discussed and established.

Tribological Performance of Microhole-Textured Carbide Tool Filled with CaF2