摘要
本文以4 mm厚A7N01铝合金板材为研究对象,基于A7N01铝合金激光-电弧复合焊接参数进行模拟仿真。采用Fluent软件进行了数值模拟,并针对不同焊接参数下的熔池温度场分布与流动性进行分析,研究了激光功率和焊接速度对激光-电弧复合焊的影响规律。结果表明,随着激光功率的增加,熔池的深度显著增加。同时,由于熔池内部的流体流动速度加快,进而导致熔池的不稳定性增大。较大的焊接速度虽然可以在较短时间内使熔池达到稳定状态,但也伴随着更快的温度变化速率,容易产生冷却不均和裂纹的风险。相反,较低的焊接速度增加了热输入,使得熔池的温度梯度更大,有助于形成更大的熔池和更深的熔深,但过多的热输入也可能引发一系列焊接缺陷问题。
This paper takes a 4 mm-thick A7N01 aluminum alloy sheet as the research object and conducts simulations based on the laser-arc hybrid welding parameters of A7N01 aluminum alloy.Numerical simulations were performed using Fluent software to analyze the temperature field distribution and fluidity of the molten pool under different welding parameters,and to investigate how laser power and welding speed affect laser-arc hybrid welding.The results show that with the increase of laser power,the depth of the molten pool increases significantly.Meanwhile,the accelerated fluid flow speed inside the molten pool may enhance its instability.Although a higher welding speed can stabilize the molten pool in a shorter time,it is accompanied by a faster temperature change rate,which may lead to uneven cooling and the risk of cracking.On the contrary,a lower welding speed increases the heat input,resulting in a larger temperature gradient of the molten pool,which is conducive to forming a larger molten pool and deeper penetration.However,excessive heat input may also cause a series of welding defect problems.
作者
李荣昊
路永新
王大锋
王世清
申志康
强伟
LI Ronghao;LU Yongxin;WANG Dafeng;WANG Shiqing;SHEN Zhikang;QIANG Wei(School of Materials Science and Engineering,Xi’an Shiyou University,Xi’an 710065,China;Key Laboratory of Corrosion Protection and New Materials for Oil and Gas Fields of Shannxi Higher Education Institutes,Xi’an Shiyou University,Xi’an 710065,China;Ningbo Branch of Chinese Academy of Ordnance Science,Ningbo 315103,China;College of Engineering and Technology,Southwest University,Chongqing 400715,China)
出处
《航空制造技术》
北大核心
2025年第13期77-83,共7页
Aeronautical Manufacturing Technology
基金
陕西省自然科学基础研究计划面上项目(2025JC-YBMS-567)。
关键词
激光-电弧复合焊
A7N01铝合金
数值模拟
温度场
流场
Laser-arc hybrid welding
A7N01 aluminum alloy
Numerical simulation
Temperature field
Flow field
