关键词: 金属陶瓷刀具, 固体润滑, 微量润滑, 双重效应, 切削性能

Abstract:  To realize the clean cutting technology, a Ti(C,N)-based self-lubricating cermet tool(TMC tool) was prepared by using a vacuum hot-press sintering process and an Al2O3-coated CaF2 composite powder as the additive phase, and the cutting performances of Ti(C,N)-based self-lubricating cermet for cutting 300M steel were investigated under the effect of MQL, the results show that the three-way cutting forces FX、FY、FZ are decreased by 36.8%, 13.1% and 32.2%, respectively, and the cutting temperature decreased by 44.3% for the dual lubrication compared with the dry cutting method. The wear on the flank faces of the tools is significantly improved under the same cutting distance condition, which is beneficial to prolong the tool life and improve the machined surface quality. In addition, energy dispersive spectrum(EDS) analysis results show that the solid lubricating films are formed on the rake faces and flank surfaces of the tools to reduce the friction. Dual lubrication effectiveness is adopted to effectively reduce the adhesive wear and oxidation wear.

Key words: cermet tool, solid lubrication, minimal quantity lubrication(MQL), dual effect, cutting performance