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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。
Under the conditions of dry cutting, low temperature nitrogen and low temperature nitrogen mist, the wear of K424 nickel base superalloy by Sialon ceramic tool and SiC whisker toughening Al2O3 ceramic tool was studied. The effects of low temperature nitrogen and oil mist on tool wear And the effect of surface roughness, a new cooling system was developed to obtain low temperature nitrogen. The experimental results show that the wear of groove at deep line severely limits the service life of ceramic tool. Compared with dry cutting, the use of low temperature nitrogen and low temperature nitrogen mist increases the groove wear rate at cut depth but decreases the quality of machined surface.