乔宇航,孙瑞,刘淑琨,王晓岗,刘国梁,杨勇.激光-超高频感应复合沉积Inconel 625合金涂层凝固过程与微观组织研究[J].表面技术,2025,54(11):144-158.
QIAO Yuhang,SUN Rui,LIU Shukun,WANG Xiaogang,LIU Guoliang,YANG Yong.Solidification Process and Microstructure of Inconel 625 Alloy Coating Deposited by Laser/Ultra-high Induction Hybrid Deposition[J].Surface Technology,2025,54(11):144-158 |
| 激光-超高频感应复合沉积Inconel 625合金涂层凝固过程与微观组织研究 |
| Solidification Process and Microstructure of Inconel 625 Alloy Coating Deposited by Laser/Ultra-high Induction Hybrid Deposition |
| 投稿时间：2024-11-02 修订日期：2025-03-07 |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.11.012 |
| 中文关键词: 超高频感应热源 电流密度 激光沉积 熔池模拟 相场模拟 枝晶生长 |
| 英文关键词:ultra-high frequency induction heat source current density laser deposition molten pool simulation phase field method dendrite growth |
| 基金项目:国家自然科学基金青年基金(52105456);国家自然科学基金面上项目(52375446);山东省自然科学基金(ZR2022ME058) |
| 作者 | 单位 |
| 乔宇航 | 青岛理工大学 机械与汽车工程学院，山东 青岛 266033 |
| 孙瑞 | 青岛理工大学 机械与汽车工程学院，山东 青岛 266033 |
| 刘淑琨 | 青岛理工大学 机械与汽车工程学院，山东 青岛 266033 |
| 王晓岗 | 中国石化胜利油田分公司 技术检测中心，山东 东营 257008 |
| 刘国梁 | 青岛理工大学 机械与汽车工程学院，山东 青岛 266033 |
| 杨勇 | 青岛理工大学 机械与汽车工程学院，山东 青岛 266033 |
|
| Author | Institution |
| QIAO Yuhang | School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao 266033, China |
| SUN Rui | School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao 266033, China |
| LIU Shukun | School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao 266033, China |
| WANG Xiaogang | Center for Technical Inspection and Testing, Sinopec Shengli Oil Field Branch, Shandong Dongying 257008, China |
| LIU Guoliang | School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao 266033, China |
| YANG Yong | School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao 266033, China |
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| 中文摘要: |
| 目的 研究激光-超高频(UHF)感应复合沉积过程中超高频感应热源对微观组织的影响规律。方法 建立微观相场(PF)模型，对凝固过程中枝晶的生长进行数值模拟。采用熔池演化的宏观模型为微观相场模型提供凝固参数和流动条件，模拟沉积过程中枝晶的生长过程，评价激光-超高频(UHF)感应沉积工艺对枝晶生长的影响。结果 在沉积过程中，随着超高频感应热源电流密度的增加，熔池固液界面的温度梯度和冷却速率逐渐增加。在电磁力的作用下，熔池中部产生了强烈的对流，其最大流速达到0.106 m/s。在枝晶生长模型中观察到，枝晶的生长速度出现周期性振荡现象，通过快速傅里叶变换(FFT)分析可知，在加入超高频感应热源后，枝晶的生长速度和振荡幅度均有所增加。此外，随着电流密度的增加，激光-超高频感应复合沉积层的一次枝晶臂间距逐渐减小。溶质分布结果表明，在激光-超高频感应复合沉积过程中，枝晶间Nb元素的平均质量分数从10.26%降至9.71%，且溶质分布更加均匀，这有助于提高枝晶间的过冷度，降低一次枝晶臂间距。最后，通过沉积实验对仿真结果进行了验证。结论 随着电流密度的提高，激光-超高频感应复合沉积层具有更精细的微观组织和更弱的元素偏析。该工作为激光-超高频感应复合沉积过程中枝晶生长的模拟提供了一个有效的模型，为确定最佳沉积工艺参数提供了参考。 |
| 英文摘要: |
| In order to study the influence law of the UHF induction heat source on microstructure during the laser/ultra-high frequency (UHF) induction hybrid deposition process. A microscopic phase field (PF) model is established to numerically simulate dendrite growth during solidification. The macroscopic model of melt pool evolution is used to provide solidification parameters and flow conditions for the microscopic phase field model to simulate the dendrite growth and solute distribution phenomena during the laser/ultra-high frequency (UHF) induction deposition process at different current densities, so as to evaluate the effect of the laser/ultra-high frequency (UHF) induction deposition process on the dendrite growth. Analysis of the macroscopic evolution model of the molten pool shows that during the laser-UHF induction hybrid deposition process, the liquid metal flow velocity in the molten pool increases significantly, which strengthens the heat transfer in the molten pool and further leads to the decrease of temperature during the laser-UHF induction composite deposition process. With the increase of current density, the maximum temperature in the molten pool decreases from 2 196.5 K to 1 982.3 K. After the introduction of the UHF induction heat source in the deposition process, the temperature gradient and cooling rate along the solid-liquid interface front increases significantly, and then shows an approximately linear increase with the increase of current density. The introduction of UHF induction heating also changes the flow state in the melt pool, and the combined effect of Marangoni and Lorentz forces leads to strong convection currents in the melt pool. The melt flow velocity along the solid-liquid interface increases and then decreases. Subsequently, the solidification parameters and flow conditions are extracted at the solid-liquid interface of the melt pool and coupled with the phase field model, and the cyclic oscillation phenomenon of the dendrite growth velocity is observed in the dendrite growth model. The fast fourier transform (FFT) analysis shows that the dendrite growth velocity and the amplitude of the oscillations increase after the addition of the ultra-high frequency inductive heat source and the oscillatory phenomenon is more complicated. In addition, with the increase of current density, the primary dendrite arm spacing (PDAS) of the laser/ultra-high frequency induction hybrid deposition layer gradually decreases, and the trend of the change is more gentle in the whole measurement range, which indicates that the addition of the ultra-high frequency induction heat source improves the stability and homogeneity of the temperature field of the molten pool. The study of solute distribution shows that the average concentration of Nb elements between dendrites decreases from 10.26% to 9.71% during the laser-UHF induction hybrid deposition process, and there is a more uniform distribution of solutes, which helps to increase the degree of subcooling between dendrites and reduce the PDAS. Secondly, with the increase of current density, the Nb element at the tip of the dendrite decays to the equilibrium concentration at a faster rate, and the solute diffuses faster, thus generating a greater growth driving force. In order to further verify the effectiveness of the UHF induction heat source in controlling the microstructure, different regions of the solid-liquid interface of the laser-UHF induction hybrid deposition layer are characterized by SEM and EDS. The laser-UHF induction composite deposition layer possesses a finer microstructure and weaker elemental segregation with the increase of current density. This work provides an effective model for the simulation of dendrite growth during laser-UHF induction composite deposition, and provides a reference for determining the optimal deposition process parameters. |
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