基于实验铝合金激光小孔焊熔池表面速度计算  

Computing Surface Velocity of Molten Pool Based on the Experiment of Laser Keyhole Welding Aluminum

作　　者：高志国[1,2] 黄坚[1,2] 李铸国[1,2] 吴毅雄[1,2] 

机构地区：[1]上海市激光制造及材料改性重点试验室(筹),上海200240 [2]上海交通大学材料科学与工程学院,上海200240

出　　处：《上海交通大学学报》2008年第S1期152-154,共3页Journal of Shanghai Jiaotong University

基　　金：国家科技部国际合作项目(2006DFB52680);上海市科委国际合作项目(061107030);上海市重点实验室项目(06DZ22102)

摘　　要：为了解决激光焊接铝合金熔池表面液态金属流动速度量值化问题,结合高速摄影装置与波动理论,提出了计算激光焊焊接过程中铝合金熔池表面液体流速的计算方法.根据有限深度液体流动模型,波速取决于液体波传播的波长以及液体深度这两个物理量,采用高速摄影对焊接过程中熔池的流动形态进行拍摄,得到进行波的波长;对焊缝截面的熔深进行测量得到液体的深度,可以计算熔池表面液体的流动速度.研究表明,在激光束功率为6 kW,焊接速度分别为0.066 7,0.075,0.083 5 m/s的高速焊情况下,熔池表面的流动速度可达0.065 8,0.064,0.072 m/s.In order to quantify liquid metal flow surface velocity during laser welding aluminum alloy,a new method was developed to calculate molten pool surface velocity based on high-speed camera equipment system and wave theory.According to the liquid flow model of limited depth,liquid wave propagation velocity depends on two physical quantities: the wavelength and the depth of liquid,which are obtained by observation of high speed camera system and weld cross section,respectively.The results show that when the la...

关 键 词：高速摄影 激光焊 铝合金 表面速度 

分 类 号：TG456.7[金属学及工艺—焊接]