激光沉积Stellite 6颗粒入射角度对涂层形成的影响  

Effect of incident angles of Stellite 6 particles on bonding performance in supersonic laser deposition process

作　　者：骆芳[1,2,3] 刘景松[2,3] 赵兵[2,3] 姚建华[2,3] 

机构地区：[1]浙江工业大学之江学院,浙江杭州310024 [2]浙江工业大学激光先进制造研究院,浙江杭州310014 [3]浙江省高端激光制造装备协同创新中心,浙江杭州310014

出　　处：《浙江工业大学学报》2016年第5期569-574,共6页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(51271170)

摘　　要：采用准静态下MTS拉伸实验,对Stellite6颗粒在Johnson-cook材料模型中的物性参数进行标定;利用有限元分析软件ABAQUS模拟单个Stellite 6颗粒以相同速度不同入射角度撞击基体的变形行为,探讨粒子入射角度对粒子沉积形貌及基体凹坑深度的影响.模拟结果表明:Johnsoncook材料模型可以很好的描述碰撞过程中粒子的变形行为,粒子入射角度的增大,不利于粒子与基体的有效结合;在粒子有角度撞击基体过程中,切向速度会使得粒子与基体之间产生相对运动,进而导致粒子与基体接触表面有摩擦力的产生,当颗粒与基体间摩擦力做功产生的积极作用大于颗粒切向滑移产生的消极作用,颗粒与基体可以形成有效结合.Using MTS tensile experiment under quasi static condition,the physical properties parameters of Stellite6 were demonstrated;Non-vertical impacting behavior of single Stellite 6particle deposited on medium carbon steel at constant speed and different impacted angle was simulated using the software package ABAQUS,the influence of single particle of different angles on deposition morphology and penetration depth was discussed.It is revealed that the deformation of particle in the process of collision could be described by the Johnson-Cook model,and the bonding strength between the particle and the substrate were reduced with increased incident angle;during the particle with incident angle impacted substrate,the tangential velocity would make relative motion between particles and substrate,the friction between the particle and substrate would be generated.The positive role of friction between the particle and substrate was greater than the negative role of the particle tangential slip,and it is beneficial to the combination between the particle and the substrate.

关 键 词：超音速激光沉积 Stellite6颗粒 Johnson-cook模型 非垂直碰撞 数值模拟 

分 类 号：TG174.442[金属学及工艺—金属表面处理] TQ630[金属学及工艺—金属学]