硬质合金基体微织构对TiAlN涂层膜-基结合性能的影响  

Cemented Carbide Substrate Micro Texture and the Influence on the Bonding Properties of the TiAlN Coating Film-Based

作　　者：何叶[1] 冯爱新[1,2] 张华夏[1] 杨润[1] 薛伟[2] 曹宇鹏[1] 李峰平[2] 田良[3] 谢华锟[3] 陈云[3] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013 [2]温州大学机电工程学院,浙江温州325035 [3]成都工具研究所股份有限公司,四川成都610000

出　　处：《应用激光》2014年第6期504-507,共4页Applied Laser

基　　金：国家自然科学基金资助项目(项目编号:51175237;51305050);江苏省普通高校研究生科研创新计划资助项目(项目编号:CXLX12_0621);浙江省国际科技合作专项资助项目(项目编号:2013C14007);江苏省"六大人才高峰"A类项目;科技部中俄双边政府间2014-2015科技合作资助项目(项目编号:CR17-11);中国博士后基金资助项目(项目编号:20100481096);江苏省博士后基金资助项目(项目编号:1002029C);温州市工业科技研究开发资助项目(项目编号:J20130033);温州大学高级人才启动基金资助项目;江苏省企业博士集聚计划资助项目;"高档数控机床与基础制造装备"科技重大专项资助项目(项目编号:2013ZX04009031-4);江苏省普通高校研究生科研创新计划资助项目(项目编号:CXLX13_642)

摘　　要：为了研究硬质合金表面激光微织构工艺对膜-基结合性能的影响,利用光纤激光对硬质合金表面进行了微织构造型(不同微凹坑直径、深度及密度),并选用PVD工艺利用超高真空多功能的磁控溅射系统对硬质合金织构后的表面进行TiAlN涂层的沉积;采用HXD-1000TMSC/LCD显微硬度计测定了涂层表面的显微硬度;应用X-350A X射线应力测定仪检测了基体织构后的表面残余应力以及涂层后试样截面的残余应力。研究结果表明:硬质合金基体激光微织构处理对涂层表面的显微硬度具有一定的影响,其中织构密度对显微硬度的影响较大;硬质合金表面激光微织构会在基体上引入残余拉应力,凹坑间距对残余应力影响很小,而织构密度对残余应力的影响较大。In the process of static magnetic field assisted laser machining, the flow field and thermal field of molten pool is difficult to be measured, therefore the numerical simulation method was used to calculate complete information of relevant parameters. A solid-liquid multiphase untied model was developed, including the solid-liquid phase transition, heat transfer, surface tension, thermal buoyancy and Lorentz force. The mechanism of laser melting which was regulated by static magnetic field was studied. The above mentioned physical processes coupled equations with boundary conditions were successfully solved by the finite element differential equation solver COMSOL Multiphysics. The distribution of the velocity field and temperature field were simulated with the magnetic field strength from 0.0 T to 0.6 T. The result showed that the velocity field was significantly inhibited by the magnetic field but it had a little effect on the temperature field. Finally, the simulation was confirmed by experiment with 316 stainless and results of sample surface temperature had a good agreement with experiment data. It indicated that the mathematical model had a certain precision and could provide guidance for the electromagnetic complex laser processing technology.

关 键 词：激光微织构 硬质合金 TIALN涂层 显微硬度 残余应力 

分 类 号：TU512.5[建筑科学—建筑技术科学]