梯度纳米硬质涂层内部应力的有限元分析  

Simulation of Residual Stress in Ti-Base Gradient Hard-Coatings

作　　者：宋慧瑾[1] 鄢强[2] 李玫[3] 董志红[1] 杨强[1] 

机构地区：[1]成都大学工业制造学院,成都610106 [2]西南石油大学机电工程学院,成都610500 [3]成都大学城乡建设学院,成都610106

出　　处：《真空科学与技术学报》2015年第6期726-731,共6页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金资助项目(81201475);四川省教育厅青年科研项目(批准号:14ZA0321)

摘　　要：利用有限元分析法模拟计算硬质涂层Ti、TiN、TiCN和TiAlN在不同情况下所受应力状态分析。结果表明:涂层上所加载的应力越大,涂层内部残余应力越大,造成的涂层损坏也越严重;在同种基体合金情况下TiCN涂层比TiN涂层相对抗压性能较好;同一种结构硬质涂层镀在高速钢基体上较镀在硬质合金基体上耐热性较好;涂层厚度的增加导致涂层所受残余应力减小,增了基体的抗静载压力,提高了基体的抗压性;同种涂层在不同温度下工作时,温度越高,所受的残余应力越大。The residual stress in the Ti-based gradient hard coatings（Ti, TiN, TiCN and TiA1N）, grown by arc ion plating on substrates of high speed steel（HSS） and tungsten carbide（YG）, was approximated, medeled and simulated in finite element method with software SOLIDWORKS. The influence of the realistic situation, including the load, tempera- ture, type of substrate and layer＇ s stoichiometry, on the residual stress of the coatings were investigated. The simulated resuhs show that the realistic situation strongly affects the residual stress. To be specific,i） As the load and/or temperature increase, the residual stress proportionally increases, accompanied by stress-induced damages; ii） TiCN coating has a higher compression resistance than that of TiN coatings grown on the same substrate; iii） Thermal resistance of all the hard coatings on HSS substrate is higher than that of the coatings on YG substrate; iv） A thicker coating produces weaker residual stress but higher anti static pressure of the substrate.

关 键 词：硬质涂层 弹性模量 有限元分析 残余应力 

分 类 号：TG711[金属学及工艺—刀具与模具]