INFLUENCE OF COLD NITROGEN GAS AND OIL MIST IN MACHINING NICKEL-BASE K424 ALLOY WITH CERAMIC CUTTING TOOLS  

低温氮气油雾对陶瓷刀具加工镍基K424合金的影响(英文)

作　　者：苏宇[1] 何宁[1] 李亮[1] 徐胜 肖茂华[1] 邱宝贵[1] 

机构地区：[1]南京航空航天大学机电学院

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》2007年第2期118-124,共7页南京航空航天大学学报（英文版）

基　　金：国家自然科学基金(50175051)资助项目~~

摘　　要：The role of cold nitrogen gas and oil mist on tool wear and surface roughness is investigated in turning the K424 nickel-base super alloy with Sialon and SiC whisker-reinforced alumina ceramic tools. A new cooling system is developed and used to lower the temperature of the compressed nitrogen gas. Experiments are performed in three different cooling/lubrication modes, i.e. the dry cutting, the cold nitrogen gas （CNG）, and the cold nitrogen gas and oil mist （CNGOM）. Experimental results show that the depth-of-cut notching severely limits the tool life in all the cooling/lubrication modes. Compared with the dry cutting, the use of CNG and CNGOMcan yield higher wear rate of depth-of-cut notching and worse surface finish.在干切削、低温氮气和低温氮气油雾3种冷却润滑条件下,通过Sialon陶瓷刀具和SiC晶须增韧Al2O3陶瓷刀具车削K424镍基高温合金的实验,研究了低温氮气及油雾对刀具磨损和表面粗糙度的影响,开发了一个新的冷却系统以获得低温氮气。试验结果表明,切深线沟槽磨损严重限制陶瓷刀具使用寿命,与干切削相比,使用低温氮气和低温氮气油雾增加了切深线沟槽磨损速率,但降低了已加工表面的质量。

关 键 词：cold nitrogen gas oil mist ceramic cutting tool tool wear surface finish 

分 类 号：TG506.1[金属学及工艺—金属切削加工及机床]