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JX－2－Ⅰ是最新研制的碳化硅晶须（SiCw）增韧和碳化硅颗粒（SiCp）弥散增强氧化铝（Al2O3）新型陶瓷刀具。本文详细研究了该刀具加工Inconel718时的切削性能，结果表明，在低速干切时的刀具抗磨损能力为YG8＞JX－2－Ⅰ＞JX－1＞JX－2－Ⅱ；在105m／min的高速湿式切削时，JX－2－Ⅰ的切削性能与JX－1差不多，但是在42m／min的速度时JX－2－Ⅰ的切削性能好于JX－1（Al2O3＋SiCw）。同时发现在用JX－2－Ⅰ中高速切削Inconel718时必须使用冷却液。由于切削温度对工件材料加工硬化的影响，以及对工件材料高温强度屈服拐点的影响而存在一个切削速度的最佳选取范围。SEM分析表明，刀具磨损的主要形式是后刀面磨损、边界磨损、切深沟槽磨损和前刀面月牙洼磨损；刀具磨损的主要机理是粘结磨损、磨粒磨损和塑性变形磨损。
JX-2-Ⅰ is a newly developed silicon carbide whisker (SiCw) toughening and silicon carbide particles (SiCp) dispersion enhanced alumina (Al2O3) new ceramic tool. In this paper, the cutting performance of Inconel718 was studied in detail. The results show that the wear resistance of the tool is YG8> JX-2-Ⅰ> JX-1> JX-2-Ⅱ at 105m / min The cutting performance of JX-2-Ⅰ is similar to that of JX-1 in high-speed wet cutting, but the cutting performance of JX-2-Ⅰ is better than JX-1 (Al2O3 + SiCw) at 42m / min. It has also been found that coolant must be used to cut Inconel 718 at high speed with the JX-2-I. Due to the effect of cutting temperature on the work hardening of workpieces and the influence of the yield point on the high temperature strength of workpieces, there is a best choice of cutting speed. SEM analysis shows that the main forms of tool wear are flank wear, boundary wear, deep groove wear and rake face crater wear. The main mechanism of tool wear is bond wear, abrasive wear and plastic deformation wear.