TiAlSiN/CrAlSiN纳米多层涂层刀具干切削TC4钛合金切削性能  

Cutting Performance of TiAlSiN/CrAlSiN Nano-multilayer Coated Tools During Dry Cutting of TC4 Titanium Alloy

作　　者：刘杰[1] 华俊芳 段慧珍 易根苗[1] 邓欣[2] LIU Jie;HUA Junfang;DUAN Huizhen;YI Genmiao;DENG Xin(School of Intelligent Manufacturing,Guangzhou Panyu Polytechnic,Guangzhou 511483;School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006)

机构地区：[1]广州番禺职业技术学院智能制造学院,广州511483 [2]广东工业大学机电工程学院,广州510006

出　　处：《宇航材料工艺》2024年第4期103-109,共7页Aerospace Materials & Technology

基　　金：2022年度广东省普通高校特色创新类项目(2022KTSCX294);广州市基础与应用基础研究项目(202201010393,202201011848);佛山市科技创新团队项目(FS0AAKJ919-4402-0023);季华实验室项目(X190061UZ190)。

摘　　要：钛合金因其化学活性和切削高温引起刀具磨损严重。刀具表面施加涂层是有效地延长刀具服役时间的方法。借助PVD阴极电弧蒸发技术,使用TiAlSi靶和CrAlSi靶交替叠加制成TiAlSiN/CrAlSiN纳米多层涂层刀具,并使用这种刀具分别切削常规钛合金和3D打印钛合金。所制成的TiAlSiN/CrAlSiN纳米多层涂层表现了较高的硬度;切削钛合金时,刀具的磨损形式表现为涂层剥离,前刀面月牙洼,后刀面均匀磨损和刀尖崩刃。引起刀具磨损的主因是粘结,其次是高温氧化。三个切削用量中,切削速度对切削力和切削温度的影响要远大于切削深度和进给量对二者的影响。与常规TC4相比,3D打印TC4因伸长率和硬度下降,弹性模量提高促使切削温度和切削力均低于常规TC4,刀具寿命相应的延长。Cutting tools of titanium alloys are subject to severe wear due to its chemical activity and high cutting temperatures.Applying coatings to the tool surface is an effective way to extend tool service time.Using PVD cathodic arc evaporation technology,the TiAlSiN/CrAlSiN nano-multilayer coating tool was made by alternately superposing TiAlSi target and CrAlSi target,which are used to cut conventional titanium alloy and 3D printed titanium alloy,respectively.The obtained TiAlSiN/CrAlSiN nanomultilayer coatings exhibit high hardness.When cutting titanium alloys,the tool wear is characterized by coating delamination,craters on the rake face,uniform wear on flank face,and chipping on tool nose.The main cause of tool wear is adhesion,followed by high temperature oxidation.Among the three cutting parameters,the effect of cutting speed on cutting force and cutting temperature is much greater than that of depth of cut and feed.Compared with conventional TC4,the cutting temperature and cutting force of 3D printed TC4 are lower than those of conventional TC4 due to the decrease of elongation and hardness and the increase of elastic modulus,and the tool life is correspondingly prolonged.

关 键 词：纳米多层涂层 TiAlSiN/CrAlSiN 刀具磨损 钛合金 3D打印钛合金 

分 类 号：V261.2[航空宇航科学与技术—航空宇航制造工程]