磁场辅助T2紫铜激光焊接熔池数值仿真与验证
Numerical Simulation and Verification of T2 Red Copper Molten Pool in Magnetic Field Assisted Laser Welding
梅丽芳 1黄继飞 1严东兵 1杨军 1刘洋 1张明军2
作者信息
- 1. 厦门理工学院机械与汽车工程学院,福建 厦门 361024
- 2. 长沙理工大学汽车与机械工程学院,湖南 长沙 410114
- 折叠
摘要
针对紫铜激光焊接能量耦合效率低与过程稳定性差的问题,通过采用添加辅助磁场的方法增大焊接母材对激光能量的吸收,并建立磁场辅助T2紫铜激光焊接的数值仿真模型.对比分析有无磁场时熔池的温度场和流速场,以探究磁场的添加对紫铜激光焊接熔池温度分布与流体流动演变规律的影响.研究发现:附加磁场后,熔池的最高温度升高,由未加磁场时的4476 K升高至4868 K,升高了约8.7%;平均流动速度降低,其中最大速度降低了约21.97%.当仿真时间处于第280 ms,未附加磁场的焊件熔池的熔宽和熔深分别为2.12 mm和1.29 mm;附加120 mT强度磁场后熔池的熔宽和熔深变为2.26 mm和1.34 mm.最后,将仿真的熔合线形貌与实验获取的熔合线形貌进行拟合对比,两者有较高的契合度,验证了所建立的数值仿真模型的准确性.
Abstract
To solve the problems of low energy coupling efficiency and poor process stability in laser welding of red copper,we use the method of adding auxiliary magnetic field to increase the absorption of laser energy by the welding base metal,and establish a numerical simulation model of magnetic field assisted laser welding of T2 red copper.The temperature field and velocity field of molten pool with and without magnetic field are compared and analyzed to explore the influence of magnetic field addition on the temperature distribution and fluid flow evolution of laser welding molten pool of red copper.The results show that with the addition of the magnetic field,the maximum temperature of the molten pool increases from 4476 K to 4868 K,an increase of about 8.7%.The average flow velocity of the molten pool decreases,and the maximum flow velocity decreases by about 21.97%.When the simulation time at 280 ms,the width and depth of the welding pool without additional magnetic field are 2.12 mm and 1.29 mm,respectively,and the width and depth of the welding pool with 120 mT intensity magnetic field are 2.26 mm and 1.34 mm,respectively.Finally,the simulated fusion line morphology is compared with the experimental fusion line morphology,and they have a high degree of fit,which verifies the accuracy of the established numerical simulation model.
关键词
激光光学/磁场/T2紫铜/激光焊接/温度场/熔池流场Key words
laser optics/magnetic field/T2 copper/laser welding/temperature field/molten pool flow field引用本文复制引用
基金项目
国家自然科学基金(52275311)
福建省科技计划对外合作项目(2020I0026)
福建省科技计划引导性项目(2022H0055)
长沙市自然科学基金(kq2202197)
福建省中青年教师教育科研项目(JAT200485)
出版年
2024
NETL
NSTL
万方数据