(西安交通大学 先进制造技术研究所， 西安 710049)
摘 要: 详细介绍了电弧喷涂层沉积过程中三维温度场有限元模拟技术，采用有限元分析软件计算了不同工艺、不同时刻以及不同位置涂层内的温度场，在建立传热模型过程中考虑了金属液滴束向涂层的传热与传质以及涂层向系统外的热量散失。采用在厚度方向以微小层叠加来模拟涂层的增厚，以此为基础构造涂层有限元计算几何模型，逐层激活层单元参与计算过程，实现移动边界以充分模拟真实的喷涂沉积过程。以实验验证计算结果，并详细讨论了喷涂沉积速率、界面传热系数以及间歇喷涂对涂层温度场的影响。
关键字: 电弧喷涂；涂层；有限元；数值模拟；温度场
（Institute of Advanced Manufacturing Technology，
Xi′an Jiaotong University，Xi′an 710049, China）
Abstract:The method of 3D FEM numerical simulation of coating temperature field during deposition process was introduced in detail. The FEA program Ansys was used in the temperature field calculation. The transfer of heat and mass from metal spray to coating and the heat loss by radiation were taken into account when the mathematical model was put forward. The geometry model was built through the micro-thickness increase of the coatings. In the model，the micro-thickness lamellas were activated gradually to participate in the calculation. Movable boundary condition was used to simulate the practical deposition process. Experiments proved that the calculation results are believable. The influence of deposition rate，coefficient of heat transfer and spraying process on coating temperature field was discussed.
Key words: arc spray; coating; FEM; numerical simulation; temperature field
