Abstract 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 Ni3Al 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-Ni3Al-CaF2 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. CaF2 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 n1 = 2, the material has high mechanical properties. Cutting experiments show that the WC-TiC-Ni3Al-CaF2 functional gradient self-lubricating tool has better cutting performance than the homogeneous WC-TiC-Ni3Al hard alloys.

中文翻译：

---

WC-TiC-Ni3Al-CaF2功能梯度自润滑刀具材料微波烧结制备及其切削性能

摘要 随着对环境的关注，绿色干切削技术越来越受到重视，自润滑刀具技术在干切削中发挥着重要作用。由于在干切削过程中对刀具高温性能的要求，以Ni3Al为粘结相的硬质合金因其优异的高温强度和高温抗氧化性而受到广泛关注。【摘要】：采用微波加热法制备WC-TiC-Ni3Al-CaF2级配自润滑材料及刀具,并对其显微组织、力学性能和切削性能进行了研究。结果表明，微波加热技术可快速制备梯度自润滑材料，强度与常规加热技术相当。CaF2不仅起自润滑作用，而且细化材料的晶粒。合理的梯度设计可以提高材料的力学性能。当梯度分布指数为 n1 = 2 时，材料具有较高的机械性能。切削实验表明，WC-TiC-Ni3Al-CaF2功能梯度自润滑刀具比均质WC-TiC-Ni3Al硬质合金具有更好的切削性能。