(西安交通大學(xué) 先進(jìn)制造技術(shù)研究所， 西安 710049)
摘 要: 詳細(xì)介紹了電弧噴涂層沉積過程中三維溫度場有限元模擬技術(shù)，采用有限元分析軟件計(jì)算了不同工藝、不同時刻以及不同位置涂層內(nèi)的溫度場，在建立傳熱模型過程中考慮了金屬液滴束向涂層的傳熱與傳質(zhì)以及涂層向系統(tǒng)外的熱量散失。采用在厚度方向以微小層疊加來模擬涂層的增厚，以此為基礎(chǔ)構(gòu)造涂層有限元計(jì)算幾何模型，逐層激活層單元參與計(jì)算過程，實(shí)現(xiàn)移動邊界以充分模擬真實(shí)的噴涂沉積過程。以實(shí)驗(yàn)驗(yàn)證計(jì)算結(jié)果，并詳細(xì)討論了噴涂沉積速率、界面?zhèn)鳠嵯禂?shù)以及間歇噴涂對涂層溫度場的影響。
關(guān)鍵字: 電弧噴涂；涂層；有限元；數(shù)值模擬；溫度場
ZHAO Wen-zhen, LU Bing-heng
（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
