【作者】 于金伟；

【导师】 黄传真；

【作者基本信息】 山东大学 ， 机械制造及其自动化， 2008， 硕士

【摘要】 在现代化加工过程中,提高加工效率的最有效方法是采用高速切削加工技术,随着现代科学技术和生产的发展,越来越多地采用超硬难加工材料,以提高机器设备的使用寿命和工作性能。而陶瓷刀具则以其优异的耐热性、耐磨性和化学稳定性以及高硬度,在高速切削领域和难加工材料方面显示了传统刀具无法比拟的优势。特别是近几年来,随着纳米技术的发展,世界各国竞相在纳米陶瓷刀具领域投入大量的人力和财力进行研究,用纳米材料开发的刀具,其力学性能和使用性能会大大提高,生产纳米复合陶瓷刀具,将有巨大的市场前景。纳米复相陶瓷刀具材料的研究成功有望从根本上解决陶瓷材料的脆性问题,比起传统刀具陶瓷刀具材料,它具有更高的抗弯强度、断裂韧度等力学性能。本课题是以氧化铝为基体,添加纳米级碳化物、硼化物和特殊添加剂,利用纳米陶瓷粉末的优异性能,提高材料的断裂韧性和抗疲劳性能,从陶瓷刀具切削可靠性要求出发,对纳米陶瓷刀具材料的组份、界面微观结构和制备工艺进行设计。研究纳米陶瓷粉末增韧机理,从根本上解决陶瓷刀具材料脆性高的问题。研究纳米陶瓷刀具的力学性能和切削性能,开发出适于高速硬态干式切削加工用高断裂韧性纳米陶瓷切削刀具。本课题研究的理论成果对于深入认识纳米陶瓷刀具材料的微观本质、力学性能和切削性能之间的关系有着重要的理论意义,对于推动纳米陶瓷刀具材料的设计、开发、推广应用以及产业化进程有重要的指导作用。更多还原

【Abstract】 In the process of modernization cutting, full out method of increasing work efficiency is adopting high speed cutting technology, with development of modern technology and production, more and more adopting exceed forcedly difficult machining material, in oeder to advance use life and work performance of equipment. Ceramic tool with excellent enduring hot, abrade, chemistry certain and high rigidity, showing unable assimilate advantage in high cutting and difficult machining material. Especially near years, with development of nano metre technology, lots of countries in world dive into a mass of manpower and resource to study, mechanical properties, using ability of exploituring tools will greatly increase, produce nano-scale or ceramic tool, it will have huge market foreground. Mechanical properties of nano-scale ceramics, such as strength and toughness are superior to that of traditional ceramics, Nano-scale has become an effective way to improve the mechanical properties of traditional ceramics.Alumina is used in this paper, and append nano-metre carbide , boride and additive, using excellent capability of nano-composite ceramics powder, to enhance part tenacity and fatigue capability, from the dependable capability of ceramics tool set out,designing element, micromechanism of interface and making technics. Studying the add tenacity Mechanism nano-composite ceramics powder,in order to solve the question of high brittleness of ceramics tool material.Researching mechanical properties and cutting ability of nano-composite ceramics tool , to empolder high part tenacity nano-composite ceramics tool for in high speed dry cutting. The theory harvest of this paper have important theory meaning for knowing the connection of microcosmic essence , mechanical properties and cutting ability of nano-composite ceramics tool material, it has important guidance effect for promoting designing, empoldering , application nano-composite ceramics tool material and industrialization course.更多还原