表面处理对TiAlSiN涂层刀具表面完整性及切削性能的影响研究

Coated tools were prone to severe tool wear and short tool life when dry cutting titanium alloys at high-speed. The surface treatment of coated tools, which might improve the surface integrity of coated tools, was an effective way to improve the wear resistance and cutting life of coated tools. The TiAlSiN coated tools were selected and treated by cryogenic treatment, micro-sandblasting treatment and cryogenic + micro-sandblasting respectively to study the effects of different treatment methods on the surface integrity of the coated tools (including surface morphology, surface roughness, micro-hardness and surface residual stress, etc.). High-speed dry cutting experiments of titanium alloys were carried out to analyse the effects of different treatment methods on the cutting performance of coated tools and to investigate ways to improve the wear resistance and cutting life of coated tools. The results indicate that compared to the single cryogenic treatment and micro-sandblasting treatment, the surface integrity of the coated tool is significantly improved and tool life is significantly increased with cryogenic + micro-sandblasting treatments. Cryogenic + micro-sandblasting treatments may reduce tool chipping, crater wear and abrasive wear, and effectively improve the wear resistance of coated tools.