Abstract: In order to improve the tool lubrication performance and reduce the use of cutting fluid as much as possible， a new type of tool with continuous lubrication at tool-chip interface has been fabricated. The tool can deliver the cutting fluid directly to the tool-chip contact interface through the inner microchannel. The new cutting tool and conventional cutting tools under the condition of dry cutting and pouring cutting fluid were used to cut 45 steel. The three-dimensional cutting force was measured. The wear surface of the rake face was analyzed by SEM micro morphology and element detection. The friction and wear characteristics and lubrication mechanism of the tool were analyzed. The results show that， compared with the conventional tools in dry cutting and pouring cutting fluid， the tool with continuous lubrication at too-chip interface may effectively reduce the friction and wear during the cutting process， while the amount of cutting fluid is only 1/120 of that in traditional pouring cutting. Through the element analysis of the rake face， it maybe seen that the cutting fluid can arrive at the area closer to the main cutting edge， and maysupply continuously. This is the main reason that the tool has better antifriction and anti-wear effect. Although the adhesion of new tools is greatly reduced， the main wear mechanism of tools is still adhesive wear and oxidation wear. 

Key words: cutting tool, continuous lubricating, tool-chip interface, wear, cutting performance

摘要： 为提高刀具润滑性能，尽量减少切削液的使用，制备出在刀屑界面持续润滑的新型刀具，能够将切削液通过微通道直接输送到刀屑接触界面内部。采用该新型刀具与普通刀具在干切削和浇注切削液条件下分别进行切削45钢试验，测量了切削三向力，对刀具前刀面磨损面进行SEM微观形貌分析及元素检测，分析了刀具的摩擦磨损特性及润滑机理。试验结果表明，与普通刀具在干切削和浇注切削液条件下相比，刀屑界面持续润滑刀具能够有效减少切削过程中的摩擦磨损，而切削液用量只有传统浇注式切削的1/120。分析前刀面的元素可知，切削液能够更加深入到离主切削刃更近的区域，并能持续供给，这是该刀具具有更好的减摩抗磨效果的主要原因。尽管新型刀具的黏结情况大大缓解，但刀具的磨损机理仍然以黏结磨损和氧化磨损为主。

关键词: 切削刀具, 持续润滑, 刀屑界面, 磨损, 切削性能