CAJ | 학술논문

在于切削、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.
재우절삭、저온담기화저온담기유무3충냉각윤활조건하,통과Sialon도자도구화SiC정수증인Al2O3도자도구차삭K424얼기고온합금적실험,연구료저온담기급유무대도구마손화표면조조도적영향,개발료일개신적냉각계통이획득저온담기.시험결과표명,절심선구조마손엄중한제도자도구사용수명,여간절삭상비,사용저온담기화저온담기유무증가료절심선구조마손속솔,단강저료이가공표면적질량.
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.