冷喷涂TC4颗粒撞击TC4基体的模拟研究  

Simulation Research on TC4 Particles Impacting TC4 Substrate in Cold Spraying

作　　者：张岚 靳磊 刘洪波[1] 李武斌 ZHANG Lan;JIN Lei;LIU Hong-bo;LI Wu-bin(Advanced Technology and Materials Institute,Guizhou Academy of Sciences,Guiyang 550014,Guizhou,China;The Aviation Key Laboratory of the Advanced Surface Engineer Technology,AVIC Manufacturing Technology Institute,Beijing 100024,China;Science and Technology on Power Beam Process Laboratory,AVIC Manufacturing Technology Institute,Beijing 100024,China;New Materials Research and Development Base of Guizhou Province,Guiyang 550014,Guizhou,China)

机构地区：[1]贵州科学院先进技术与材料研究所,贵州贵阳550014 [2]中国航空制造技术研究院先进表面工程航空科技重点实验室,北京100024 [3]中国航空制造技术研究院高能束流加工技术国家级重点实验室,北京100024 [4]贵州省新材料研究开发基地,贵州贵阳550014

出　　处：《机械研究与应用》2025年第2期74-76,共3页Mechanical Research & Application

摘　　要：该文利用有限元分析软件LS-DYNA建立了TC4颗粒撞击TC4基板的三维模型,采用Gruneisen状态方程和Johnson-Cook材料模型来模拟不同半径颗粒以同一速度撞击基板以及同一颗粒以不同速度撞击基板的情况,分析了颗粒以不同半径与不同速度撞击基板对沉积颗粒变形行为的影响。同时,采用冷喷涂技术在TC4基板上沉积TC4涂层,研究了涂层不同部位硬度的变化趋势。研究表明:TC4颗粒以不同速度撞击TC4基板时,速度越大金属溅射现象越显著;不同半径TC4颗粒以相同速度撞击TC4基板时,颗粒半径越大金属溅射现象越显著;不同喷涂压力的情况下,涂层硬度变化趋势相同,均是从底部到顶部,硬度逐渐降低。模拟结果描述了难以通过实验观察到的短时间内的碰撞过程,并通过实验得到了涂层的硬度变化趋势。In this paper,the finite element analysis software LS-DYNA was used to establish a three-dimensional model of TC4 particle impact on TC4 substrate.The Gruneisen equation of state and Johnson-Cook material model were adopted to simulate the situation of particles with different radii impacting the substrate at the same speed and the same particle impacting the substrate at different speeds.The influence of different radius and velocity of particles impacting substrate is analyzed.The TC4 coating was deposited on the TC4 substrate by cold spraying technology,and the variation trend of hardness in different parts of the coating was studied.The results show that when TC4 particles impact TC4 substrate at different velocities,the sputtering phenomenon is more significant with higher velocities.When TC4 particles with different radius impact TC4 substrate with the same speed,the larger the particle radius is,the more significant the metal sputtering phenomenon is.Under different spraying pressures,the hardness of the coating changes in the same trend,from the bottom to the top,the hardness gradually decreases.The simulation results describe the collision process in a short period of time which is difficult to be observed by experiment,and the hardness trend of the coating is obtained by experiment.

关 键 词：冷喷涂 TC4钛合金 数值模拟 涂层硬度 

分 类 号：V261.93[航空宇航科学与技术—航空宇航制造工程]