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材料导报  2025, Vol. 39 Issue (23): 24110162-7    https://doi.org/10.11896/cldb.24110162
  金属与金属基复合材料 |
振荡频率对TC4合金激光氮化组织形貌的影响及其数值模拟
罗健涵, 田晓东*, 王苗明月
长安大学材料科学与工程学院,西安 710064
Experimental and Numerical Study on the Effect of Oscillation Frequency on the Morphology and Microstructure of TC4 Alloy in Laser Nitriding
LUO Jianhan, TIAN Xiaodong*, WANGMIAO Mingyue
School of Materials Science and Engineering, Chang’an University, Xi’an 710064, China
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摘要 圆形振荡扫描技术可以提高激光氮化层质量,但其熔池热力学仍有待研究。本文采用试验与数值模拟相结合的方法研究了振荡频率对氮化层组织形成的影响。实验结果表明,随着振荡频率的升高,无振荡激光氮化组织中的氮化区域缺失现象逐渐消失,而且氮化层中氮化物的分布也更加均匀。通过考虑传热的数值模型分析发现,圆形振荡激光会降低熔池的峰值温度和温度梯度,且随着振荡频率的升高,熔池温度场从半椭圆状转变为“W”状,使得温度场分布更加均匀,这促进了圆形振荡扫描激光氮化层的组织优化。
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罗健涵
田晓东
王苗明月
关键词:  激光氮化  TC4合金  圆形振荡扫描  温度场  显微组织    
Abstract: Circular oscillation scanning technology can enhance the quality of the nitriding layer, but the thermodynamics of the molten pool still require further investigation. In this work, a combination of experimental and numerical simulation methods was employed to explore the relationship between oscillation frequency and the formation of the nitriding layer microstructure. A numerical model that accounts for heat transfer was used to simulate the dynamic behavior of the molten pool temperature field and the thermal cycling process. The results show that circular oscillation laser reduces the peak temperature and temperature gradient in the molten pool. As the oscillation frequency increases, the temperature field distribution in the molten pool tends to form a "W" shape, leading to a more uniform temperature field distribution. Concurrently, with the increase of oscillation frequency, the distribution of nitrides also becomes more uniform. These indicate that oscillating laser technology improves the non-uniform nitriding and the lack of nitriding area in conventional non-oscillating laser nitriding by altering the temperature field distribution during the laser nitriding process.
Key words:  laser nitriding    TC4 alloy    circular osillating scanning    temperature field    microstructure
出版日期:  2025-12-10      发布日期:  2025-12-03
ZTFLH:  TB31  
通讯作者:  *田晓东,长安大学材料科学与工程学院副教授、硕士研究生导师,目前主要从事材料表面改性和材料腐蚀与防护方面的研究。tianxd@chd.edu.cn   
作者简介:  罗健涵,长安大学材料科学与工程学院硕士研究生,研究方向为材料表面改性,主要研究课题为钛合金表面耐磨和抗氧化涂层技术。
引用本文:    
罗健涵, 田晓东, 王苗明月. 振荡频率对TC4合金激光氮化组织形貌的影响及其数值模拟[J]. 材料导报, 2025, 39(23): 24110162-7.
LUO Jianhan, TIAN Xiaodong, WANGMIAO Mingyue. Experimental and Numerical Study on the Effect of Oscillation Frequency on the Morphology and Microstructure of TC4 Alloy in Laser Nitriding. Materials Reports, 2025, 39(23): 24110162-7.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.24110162  或          https://www.mater-rep.com/CN/Y2025/V39/I23/24110162
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