陶瓷刀具车削铁基粉末冶金复合材料时的磨损机理研究  

Wear Mechanism of Ceramic Tool in Turning Iron-base P/M Composite

作　　者：韩立发[1] 夏伟[2] 屈盛官[2] 

机构地区：[1]东莞理工学院机电工程系,广东省东莞市工学博士523808 [2]华南理工大学

出　　处：《工具技术》2007年第4期7-10,共4页Tool Engineering

基　　金：国家自然科学基金重点项目(项目编号:50135020)

摘　　要：通过对Al2O3基陶瓷刀具车削NbC颗粒增强铁基粉末冶金复合材料的试验研究,分析了刀具的磨损机理。结果表明,陶瓷刀具不会发生严重的磨粒磨损,刀具的高脆性及复合材料中增强相的剧烈刮擦、冲撞引起的切削刃微崩和剥落磨损是刀具磨损的主要原因。增强相含量较低时,刀具同时发生粘着磨损;增强相含量越高,粘着磨损程度越轻微。The mechanism of tool wear for turning NbCp-reinforced iron-base powder metallurgical composites with Al2O3- based ceramic tool is researched by turning experiments. The results show that no severe abrasive wear is found in cutting edge, the main modes of wear are micro-fracture and chipping of cutting edge caused by its high brittleness and the heavy scrape of reinforcements in composites. Adhesive wear is also found while smaller amount of reinforcements in the composites, The more the mass fraction of reinforcements is, the slighter the adhesive wear occurs on ceramic tool.

关 键 词：车削 刀具磨损 陶瓷 铁基复合材料 粉末冶金 

分 类 号：TG711[金属学及工艺—刀具与模具]