Al_(2)O_(3)/TiC梯度功能陶瓷刀具的切削性能及损坏机理  

Cutting Performance and Failure Mechanism of Al_(2)O_(3)/TiC Functionally Gradient Ceramic Tool

作　　者：赵军[1] 王亮德[2] 王志孟 

机构地区：[1]山东工业大学机械工程学院，济南 250061 [2]山东滨州工业学校，滨州 256612 [3]青岛生建机械厂，青岛 266100

出　　处：《工具技术》2000年第6期11-13,共3页Tool Engineering

基　　金：国家自然科学基金资助项目(项目编号:59505014);山东省优秀中青年科学家奖励基金资助项目 (项目编号:97215521)

摘　　要：采用粉末叠层填充—轴向热压烧结工艺研制成功性能优良的Al2 O3/TiC梯度功能陶瓷刀具 ,并在柴油机排气阀外圆粗车工序中与普通陶瓷刀具LT55进行了对比切削试验。结果表明 ,Al2 O3/TiC梯度功能陶瓷刀具的寿命比LT55提高 50 %,梯度功能陶瓷刀具的破损主要是机械疲劳作用所致 ,而LT55刀具的破损主要是热疲劳作用的结果。The Al 2O 3/TiC functionally gradient ceramic tool with excellent properties is fabricated via the powder laminating hot pressing technique, and its cutting performance is tested in rough turning the cylindrical surface of exhaust valve for diesel engines by comparison with that of the common ceramic tool LT55. The results indicated that the tool life of Al 2O 3/TiC functionally gradient ceramic tool increased by 50 percent over that of LT55. The fracture of functionally gradient ceramic tool is mainly caused by the mechanical fatigue, while the thermal fatigue contributed much to the fracture of LT55 tool.

关 键 词：陶瓷刀具 梯度功能材料 切削 机械疲劳 

分 类 号：TG711.01[金属学及工艺—刀具与模具]