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With the concern of the environment, green dry cutting technology is getting more and more attention and self-lubricating tool technology plays an important role in dry cutting. Due to the demand for high temperature performance of tools during dry cutting process, cemented carbide with Ni 3 Al as the binder phase has received extensive attention due to its excellent high temperature strength and high temperature oxidation resistance. In this paper, WC-TiC-Ni 3 Al-CaF 2  graded self-lubricating material and tools were prepared by microwave heating method, and its microstructure, mechanical properties and cutting performance were studied. Results show that gradient self-lubricating material can be quickly prepared by microwave heating technology, and the strength is equivalent to that of conventional heating technology. CaF 2  not only plays a role in self-lubrication, but also refines the grain of the material. A reasonable gradient design can improve the mechanical properties of the material. When the gradient distribution exponent is n 1  = 2, the material has high mechanical properties. Cutting experiments show that the WC-TiC-Ni 3 Al-CaF 2  functional gradient self-lubricating tool has better cutting performance than the homogeneous WC-TiC-Ni 3 Al hard alloys.

Preparation of WC-TiC-Ni 3 Al-CaF 2 functionally graded self-lubricating tool material by microwave sintering and its cutting performance