CVD金刚石薄膜刀具加工SiC_p/Al的切削磨损研究

采用金刚石薄膜涂层刀具加工SiCp/Al复合材料，研究了切削参数、刀具材料、刀具几何参数和工件材料对金刚石薄膜涂层刀具磨损的影响规律，同时研究了SiCp/Al复合材料切削加工性能。     

CVD金刚石薄膜刀具加工SiCp/Al的切]削磨损研究

采用金刚石薄膜涂层刀具加工SiCp/Al复合材料，研究了切削参数、刀具材料、刀具几何参数和工作材料对金刚石薄膜涂层刀具磨损的影响规律，同时研究了SiCp/Al复合材料切削加工性能。     

晶粒细化对金刚石涂层刀具切削性能的影响

金刚石涂层具有高硬度、低摩擦系数、高耐磨性和高导热性能。本文着重介绍了金刚石涂层刀具的发展动向及现状,并通过金刚石涂层刀具的切削试验表明了金刚石涂层刀具的使用寿命明显高于未涂层的硬质合金刀具,采用金刚石涂层刀具进行切削可以获得更高的表面加工质量和生产率。     

金刚石涂层刀具在干式切削中的性能分析

介绍了干式切削加工技术的优点及发展趋势,分析了干式切削刀具技术及金刚石涂层刀具的性能特点.通过铝硅合金的干式切削试验,研究了金刚石涂层刀具的干式切削加工特性.经试验表明,金刚石涂层刀具正常磨损阶段,工件表面粗糙度非常稳定;刀具损坏以涂层脱落为主,刀具寿命取决于涂层与机体的结合强度;进给量对工件表面粗糙度影响最大,如果进给量合适,可以保证金刚石涂层刀具在高速下具有良好的干式切削性能.     

CVD金刚石薄膜刀具加工SiCp／Al复合材料的切削磨损研究

通过用CVD金刚石薄膜涂层刀具切削加工SiC颗粒增强基复合材料的试验,研究了切削参数、刀具材料、刀具几何参数和工件材料对CVD金刚石薄膜涂层刀具磨损的影响规律,同时研究SiCp/Al复合材料的切削加工性能。     

CVD金刚石薄膜刀具加工SiC_p/Al复合材料时的切削磨损研究

通过用CVD金刚石薄膜涂层刀具切削加工SiC颗粒增强铝基复合材料的试验 ,研究了切削参数、刀具材料、刀具几何参数和工件材料对CVD金刚石薄膜涂层刀具磨损的影响规律 ,同时研究了SiCp/Al复合材料的切削加工性能。     

超细晶粒金刚石涂层刀具高速铣削石墨的切削性能研究

选用超细晶粒和粗晶粒金刚石涂层的双刃整体硬质合金平头立铣刀,在相同切削参数下进行石墨的高速铣削加工试验.试验结果表明:超细晶粒金刚石涂层刀具具有良好的表面涂层性能,在切削过程中刀刃磨损均匀缓慢,刀具的使用寿命和工件的加工表面质量都优于粗晶粒金刚石涂层刀具,适合石墨等硬脆材料的高速切削加工.     

金刚石刀具性能及其应用研究

描述了金刚石的物理特性,对金刚石刀具的分类及其性能行了介绍,包括天然金刚石、聚晶金刚石、聚晶金刚石复合片、化学气相沉积金刚石涂层刀具.分析和对比了不同类型金刚石刀具的应用场合,为企业在加工难加工材料时选用超硬金刚石材料刀具时提供参考.     

金刚石薄膜涂层刀具切削性能与磨损过程的研究

金刚石薄膜具有高硬度、低摩擦系数、高耐磨性和高导热性能。金刚石薄膜涂层刀具高速干切削硅铝合金可提高生产率。通过金刚石薄膜涂层刀具的切削试验和考察其磨损过程，表明了金刚石薄膜涂层刀具的使用寿命明显高于未涂层的硬质合金刀具，金刚石薄膜涂层刀具的磨损是由薄膜的显微断裂而逐渐脱落的过程。     

影响CVD金刚石涂层硬质合金界面结合强度的因素及其改善方法

化学气相沉积法制备金刚石涂层硬质合金刀具综合了金刚石与硬质合金的优异性能,被广泛应用于切削难加工材料.金刚石与基体界面结合强度是评价金刚石涂层的一个主要性能指标.本文主要介绍了影响CVD金刚石涂层刀具界面结合强度的主要因素,并对如何提高其界面结合强度的方法进行了较深入的探讨,这对解决刀具基体与金刚石涂层之间的界面结合强度问题具有一定的实际意义.     

复杂形状金刚石薄膜涂层刀具的制备与试验研究

为了提高金刚石薄膜与衬底附着力,以整体式硬质合金麻花钻为例,对刀具衬底的预处理技术和ＣＶＤ涂层技术进行了研究;以碳化硅颗粒增强铝基复合材料的加工为例,对复杂形状金刚石薄膜涂层刀具的制备及应用技术提出了合理建议。     

CVD金刚石薄膜涂层刀具精密切削表面质量的研究

CVD金刚石薄膜刀具的表面粗糙度及加工过程中的切削用量是影响加工工件表面质量的关键因素。为改进CVD沉积工艺 ,减小金刚石薄膜表面粗糙度 ,提出了合理控制沉积气压的新工艺方法 ,并通过切削试验研究了不同沉积工艺下制备的CVD薄膜涂层刀具和加工过程中不同切削用量对精密切削表面质量的影响。     

CVD金刚石薄膜涂层刀具精密切削表面质量的研究

CVD金刚石薄膜刀具的表面粗糙度和加工过程中的切削用量是影响加工工件表面质量的关键因素.为改进CVD沉积工艺,减小金刚石薄膜表面粗糙度,提出了合理控制沉积气压的新工艺方法,并通过切削试验研究了不同沉积工艺下制备的CVD薄膜涂层刀具和加工过程中不同切削用量对精密切削表面质量的影响.     

Elliptical vibration cutting of hardened die steel with coated carbide tools

Elliptical vibration cutting of hardened die steel with coated carbide tools is examined in this research in order to achieve low-cost high-precision machining. Diamond coated tools are applied because of superior hardness of their polycrystalline diamond coating and its low manufacturing cost. TiN coated tools are also tested, since they are widely used for conventional machining of steels. Machinability of hardened die steel by the elliptical vibration cutting with coated carbide tools is discussed in three aspects in this study, i.e. transferability of cutting edge profile to cut surface, cutting force, and tool life. The transferability is evaluated quantitatively by calculating correlation coefficients of measured roughness profiles. It is clarified that the diamond coated tools have high transferability which leads to diffraction of light on the surface machined at micro-scale pick feed. Total cutting forces including ploughing components are measured at various feed rates, and then shearing components and ploughing components are separated utilizing linear regression. The measured results indicate, for example, that the all forces become considerably smaller only when elliptical vibration is applied to the TiN coated tool without cutting fluid. It is also found that this considerable reduction of forces interestingly corresponds to higher friction coefficient, which is identified from the ploughing components. Tool life tests are carried out by various machining methods, i.e. elliptical vibration/ordinary wet/dry cutting with diamond/TiN coated tools. The result shows, for example, that the flank wear is smallest in the wet elliptical vibration cutting with the diamond coated tool.     

Approach for Polishing Diamond Coated Complicated Cutting Tool: Abrasive Flow Machining(AFM)

Lower surface roughness and sharper cutting edge are beneficial for improving the machining quality of the cut?ting tool, while coatings often deteriorate them. Focusing on the diamond coated WC?Co milling cutter, the abrasive flow machining(AFM) is selected for reducing the surface roughness and sharpening the cutting edge. Comparative cutting tests are conducted on di erent types of coated cutters before and after AFM, as well as uncoated WC?Co one, demonstrating that the boron?doped microcrystalline and undoped fine?grained composite diamond coated cutter after the AFM(AFM?BDM?UFGCD) is a good choice for the finish milling of the 6063 Al alloy in the present case, because it shows favorable machining quality close to the uncoated one, but much prolonged tool lifetime. Besides, compared with the micro?sized diamond films, it is much more convenient and e cient to finish the BDM?UFGCD coated cutter covered by nano?sized diamond grains, and resharpen its cutting edge by the AFM, owing to the lower initial surface roughness and hardness. Moreover, the boron incorporation and micro?sized grains in the underly?ing layer can enhance the film?substrate adhesion, avoid the rapid film removal in the machining process, and thus maximize the tool life(1040 m, four times more than the uncoated one). In general, the AFM is firstly proposed and discussed for post?processing the diamond coated complicated cutting tools, which is proved to be feasible for improving the cutting performance     

金刚石薄膜涂层刀具切削Al-12%Si合金的性能研究

分析了切削用量对金刚石薄膜涂层刀具损伤形式的影响,并对金刚石薄膜涂层刀具和硬质合金刀具切削 Ａｌ １２％ Ｓｉ合金的耐磨性进行了对比试验。     

STUDY ON COATING MECHANISM OF DIAMOND FILM ON CUTTING TOOL AND ITS APPLICATION

0 INTRODUCT[ONDiamond is a kind Of excellent cutting tool material for cutting non-fermus metal and nonmetallicmaterials. Because of the limited supply and high cost of natural diamond it has been mainly used forspecial aPPlications Where no other tools can Perform satisfactorily.The study of dePOsition of diamond film on cutting tools and its wide aPPlications began in 1980.Great Progress has been made at the same time. The [ypical principles used in coated-cutting tool are thehacrow…     

CVD金刚石刀具的制备工艺研究

详细介绍了CVD金刚石厚膜刀具和涂层刀具的制备工艺，分析了目前制约CVD金刚石刀具制造和工业化过程的关键技术问题，制备出的CVD金刚石刀具满足了高硅铝合金等难加工材料的加工需求。     

刀尖圆弧半径对金刚石薄膜涂层刀具耐冲击性的影响

通过断续车削试验研究了刀尖圆弧半径对金刚石薄膜涂层刀具耐冲击性的影响,指出适当增大刀尖圆弧半径可有效提高金刚石薄膜涂层刀具的耐冲击性。