第6期 2017年6月
组合机床与自动化加工技术
Modular Machine Tool & Automatic Manufacturing Technique
文章编号：10012265(2017)06012204
D0I: 10. 13462/j. cnki. mmtamt. 2017. 06. 031
PVD法制备的TiAIN/AI,O，复合涂层
氧化铝陶瓷刀具切削性能研究
刘杰，秦聪祥”
No.6 Jun.2017
（1.广州番禹职业技术学院机电工程学院，广州511483；2.山东理工大学机械工程学院，山东淄博255000）
摘要：在刀具表面沉积一层硬质、耐磨涂层，可有效提高刀具切削性能。目前刀具涂层的研究主要侧重于氮化物、碳化物等硬质涂层（基体为硬质合金），氧化物涂层（基体为陶瓷）仍未有突破性进展。文章涉及陶瓷基体表面的氮化物和氧化物涂层制备及切削性能研究。采用阴极电弧蒸发镀技术（PVD-CAE)和PEM辅助PVD工艺在氧化铝陶瓷刀具表面制备TiAIN硬质耐磨涂层（中间层）和 AI,O，抗高温氧化涂层（外层）。采用扫描电子显微镜（SEM）和EDS线扫法分析涂层微观结构和元素成分变化，通过显微硬度计表征涂层表面硬度。通过连续干切削灰铸铁试验研究TiAIN/Al,O，涂层的切削寿命、磨损机理和加工表面质量。结采表明：该复合涂层具有细品致密的微观结构：TiAIN 硬质层可将刀具表面硬度升至2781±19HVs
，从而提高了刀具耐磨性；连续干切削灰铸铁试验
中，无涂层氧化铝刀具发生崩刃破损，而TiAIN/Al,O，涂层刀具主要发生磨粒磨损和少量的粘结磨损，无崩刃现象;PVD法制备的TiAIN/AI,O，涂层刀具寿命是常规无涂层氧化铝刀具的2倍以上，且加工表面质量优良而稳定
关键词：PVD涂层；TiAIN/Al,O，涂层；氧化铝刀具；切削性能
中图分类号：TH162;TG506
文献标识码：A
CuttingPerformance of Alumina Ceramic Cutting Tools Coated with
TiAIN/Al,O, Composite Coatings Produced by PVD
LIU Jie', QIN Cong-xiang
(1. School of Electromechanical Engineering, Guangzhou Panyu Polytechnic, Guangzhou 511483, China; 2. School of Mechanical Engineering, Shandong University of Technology, Zibo Shandong 255000, China) Abstract: An layer of hard, wear-resistant coating on the tool surface can effectively improve the cutting performance of the tool. At present, the research on tool coating mainly focuses on hard coatings such as ni-trides, carbides and so on ( the matrix is carbide). The oxide coating ( the matrix is ceramic) has not yet made breakthrough progress. This paper deals with the preparation of nitride and oxide coatings on the sur-face of ceramic substrates and their cutting performance. Hard TiAIN antiwear coating ( inner layer) and Al,O, anti-high temperature coating (outer layer) were prepared by the PVD-CAE and PEM-assisted PVD, respectively. The changes in microstructural and elemental composition of the coating were analyzed by SEM and EDS. The tool life of TiAIN/Al,O,coating, wear mechanism, and quality of the finished surface were studied by the continuous dry cutting of gray cast iron. The results show that this coating has a dense microstructure containing fine grains; the hard TiAiN coating improved the hardness of the cutting tools to 2781 ± 19HVsog- During the continuous dry cutting of gray cast iron, the main failure mode of uncoated tools is tipping damage, while the main failure mode of the TiAIN/Al,O, coated tools is abrasive wear and some adhesive wear; This coating tool life is 2 times more than that of conventional uncoated tool. and the finished surface has a good quality and stability.
Key words: PVD coating; TiAIN/Al,O; coating; alumina cutting tools; cutting perform
收稿日期：20160927：修回日期：20161118*基金项目：广州市属高校科技计划项目(1201421141）
作者简介：刘杰(1974一），男，内蒙古包头人，广州番属职业技术学院副教投，工学预土，研究方向为先进加工工具与高技术陶登，（E-mail)liu
jie9118@ 163.com
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