【作者】 杨鑫；

【导师】 金洙吉；

【作者基本信息】 大连理工大学 ， 机械制造及自动化， 2012， 硕士

【摘要】 核电作为一种清洁、无污染的可持续发展的能源,受到世界各国的广泛重视。我国已把“核主泵制造的关键科学问题”被列为973计划课题。核主泵关键零部件的洁整化加工制造是核电装备制造领域亟待解决的难题之一。本文根据核设备关键部件的高洁整化表面的制造要求,制备出一种新型的A1203基陶瓷刀具,并从加工表面洁净度和耐蚀性分析试验、加工表面粗糙度分析试验、切削温度和切削力的在线测量试验、刀具的磨损特性和磨损机理等方面做了研究。首先,本文根据核设备的高洁整化表面的制造要求,通过选择合理的组分、烧结方法制备出成分纯净不含有害元素的A1203基陶瓷刀具,并对刀具组织致密性和材料的力学性能进行了研究。其次,选用传统的YG8硬质合金刀具、普通的高速钢刀具、Ti(C,N)基金属陶瓷刀具和新型氧化铝基陶瓷刀具进行干式车削304奥氏体不锈钢的对比试验,从加工表面的洁净度、核环境下的表面耐蚀性和表面完整性方面做了研究。结果表明,与传统的刀具相比,新型方案A陶瓷刀具在加工表面的清洁度、表面耐蚀性和表面光洁度方面有一定的优势。另外,对新型A1203基陶瓷具切削304钢的切削温度和切削力进行了在线检测,并研究了切削温度和切削力的变化规律及影响因素,结果表明,新型的陶瓷刀具更适合高速切削,在精加工阶段和半精加工阶段,新型的方案A陶瓷刀具车削304钢的切削温度和切削力要远低于硬质合金刀具。最后,本文对新型A1203陶瓷刀具干式切削304奥氏体不锈钢的磨损特性及磨损机理进行了研究,试验结果表明,在精加工阶段,新型的方案A陶瓷的刀具的耐磨性最好,发生轻微的粘结磨损；方案B陶瓷刀具出现了块状崩刃；硬质合金刀具发生了严重的粘结磨损。更多还原

【Abstract】 Nuclear power is a clean, pollution-free energy for sustainable development and gets more and more attention from countries of the world. The key scientific issue of nuclear pump manufacturing has been listed as973projects in our country. It is the key to promote nuclear power automation. Based on the cleanliness and integrity surface machining requirements for the key components of nuclear main pump, summarying and studying traditional and non-traditional machining methods, in order to solve the problem of the existing cutting tools difficult to machining a high undefiled and integrated surface, two new Al2O3-based ceramic cutting tools are prepared, to do the research from the surface cleanliness, corrosion resistance, surface roughness analysis, the cutting temperature and cutting force, tool wear mechanism.First, based on the nuclear equipment manufacturing requirements,a non-contain metal-binding agents or pure ingredients Al2O3ceramic tool is prepared by selecting a reasonable formula and sintering process, The compact structure and mechanical properties are also discussed.Secondly, the comparation dry-turning of304austenitic stainless steel experiment is conducted among the new alumina-based ceramic cutting tools and traditional YG8hard alloy cutting tool, high-speed steel cutting tool, Ti (C, N) based on alumina, analyzing the surface cleanliness and integrity, the surface corrosion under nuclear environment is also studied. The results showed that compared with traditional tools, the novel A ceramic cutting tool have an obvious advantage in machined surface cleanliness, corrosion resistance and integrity.In addition, do on-line detection of the cutting temperature and cutting force, analyzing the variation law and the influencing factors, the results show that the new type of ceramic tool is more suitable for high-speed cutting, and in the stage of finishing and semi-finishing, the cutting temperature and cutting force of the new type of ceramic tool cutting304is far lower than the hard alloy cutting tools, in particular the novel A ceramic tool have an obvious advantage.Finally, the wear characteristics and wear mechanism of the dry cutting of the304austenitic stainless steel are analyzed, test results show that in the finishing stage, the novel A ceramic tool have the best wear resistance in the three type of cutting tools, a minor adhesive wear occurs on tool point of the novel A ceramic tool; novel B ceramic tool appear block chipping in the tool point because of its lower toughness and more severe adhesive wear happened on the hard alloy cutting tool.更多还原