陶瓷刀具切削304不锈钢时的磨损性能

STUDY ON THE WEAR PERFORMANCES OF CERAMIC TOOLS FOR MACHINING 304 STAINLESS STEEL

采用Si3N4基陶瓷、Ti（CN）基陶瓷、YT15硬质合金和高速钢（HSS）四种刀具对304奥氏体不锈钢进行了切削试验，比较各种刀具的耐磨损性能，并且用SEM、EDX等对刀具的磨损表面进行分析结果指出：除HSS外其它刀具均存在一个最佳切削速度在切削较长路程时，FD03和YT15显示最好的耐磨性能。

The cutting experiments of four tools, whose materials were St3N4--based ceramics (FD03),Ti(CN)-based ceramics(FD22), YT15 cemented carbide, and high speed steel(HSS), respectively, to 304 stainless steel were carried out on a lathe. The cutting performances of the tools were evaluated at different machining conditions. SEM and EDX were employed to analyse the wear track morphologies and element diffusion at the interfaces of adhered layers and tools. The results showed that there existed an optimum tooling velocity for those tools except HSS FD03 and YT15 tools presented the excellent wear resistance, which was about 10 times that of FD22, under the condition of a longer machining distance, whereas HSS tool could not work normally due to its bad wear resistance. The wear mechanisms of these tools were analyzed.