不同润湿性微/纳织构化刀具切削性能研究

Study on Cutting Performance of Micro/Nano Textured Tool Surface with Different Wettability

针对15-5PH固溶处理不锈钢等难加工材料切削过程中刀具磨损快速的问题,采用激光加工及表面处理技术制备得到不同润湿性的硬质合金微/纳织构化刀具。通过对15-5PH固溶处理不锈钢的切削试验,研究了不同润湿性微/纳织构化刀具的切削性能及减摩机理。试验结果表明:在微量润滑条件下,刀具表面低润湿性微/纳织构的存在可有效降低切削力、前刀面平均摩擦系数及切削温度,同时还能进一步改善刀—屑界面的润滑状况,减缓刀具磨损。

Aimed at the problem of rapid tool wear in cutting process of the difficult-to-machine materials such as the15-5 PH stainless steel with solution treatment,the micro/nano textured tools with different wettability were fabricated by laser texturing and surface treatment. The cutting experiments were conducted by the 15-5 PH stainless steel with solution treatment and then the cutting performance and antifriction mechanism of micro/nano textured tool surfaces with different wettability were studied. The results indicated that in the condition of minimal quantity of lubrication（MQL）,the cutting force, the average friction coefficient on the rake face and the cutting temperature could be reduced by the micro/nano texture with low wettability on the tool surface. At the same time,the lubricating condition on the tool-chip interface could be improved and the tool wear was also slow down.