中文摘要：

采用Sialon陶瓷刀具对镍基合金Inconel718进行了车削实验，得到了不同切削参数下的刀具寿命、切削力和已加工表面粗糙度与刀具后刀面平：均磨损宽度的关系。分析了不同切削条件下所形成的剥落磨损、月牙洼磨损、塑性变形、崩刃和边界磨；埙等失效形式，并与未失效刀具的磨损形态做了对比分析。结果表明Sialon陶瓷刀具加工镍基合金时的磨损机理是塑性变形、剥落破坏、黏结磨损、扩散磨损。

英文摘要：

Sialon ceramic tool was used in turning of Inconel 718. The effects of cutting speed and feed rate on tool wear, surface roughness, and cutting forces were tested and analyzed at different cutting speeds and different feed rates. The modes and mechanism of tool wear of Sialon ceramic insert were analyzed. Tool life was given out in different conditions. Results show that the dominant wear patterns are rake face wear, flank wear, micro-- chipping, delamination, notch wear, and breakage. The main wear mechanism is from adhesion, diffusion and abrasive. High temperature and high pressure play important roles in the cutting tool wear in high--speed turning of Ineonel 718.