基于切削可靠性的新型陶瓷刀具材料的研制

Development of Advanced Ceramic Tool Material Based on Cutting Reliability

建立了切削可靠性和刀具力学性能之间的关系模型,根据切削可靠性和断裂韧性的要求设计并制备出了颗粒和晶须协同增韧的陶瓷刀具JX-2,其力学性能与晶须增韧陶瓷刀具(JX-1)相当,但成本低,且抗扩散磨损的能力强。将JX-2、JX-1和硬质合金刀具YG6X进行对比切削电铸纯镍实验,JX-2的切削速度最高,磨损寿命最长,其抗磨损能力最强,是加工纯镍或高镍合金等材料的理想刀具。

The relationship between cutting reliability and the mechanical properties of ceramic tool materials was established. A new type of ceramic tool material JX-2 based on synergism toughening effect by particle dispersion and whisker reinforcement was designed and fabricated to achieve the reguired cutting reliability and fracture toughness. The mechanical properties of JX-2 are almost the same as those of whisker-reinforced ceramic tool material JX-1, but the production cost of JX-2 is lower and its diffusion wear resistance is greater than that of JX-1. In a comparative electrolytic pure nickel machining test on JX-2,JX-1 and cemented cabride tool YG6X,JX2 showed the logest tool life,highest cutting speed and strongest wear resistance. Consequently, the ceramic tool material JX-2 is the most suitable tool for machining electrolytic pure nickel, high nickel alloy, and other similar materials.