Numerical simulation of full penetration laser welding of thick steel plate with high power high brightness laser
Numerical simulation of full penetration laser welding of thick steel plate with high power high brightness laser
复制标题
高功率高亮度激光厚钢板全熔透激光焊接数值模拟
DOI：
10.1016/j.jmatprotec.2014.03.016
复制
发表时间：
2014-08-01
影响因子：
6.3
通讯作者：
Na, S. J.
中科院分区：
文献类型：
--
作者：
Zhang, L. J.;Zhang, J. X.;Na, S. J.
采用16kW最大功率连续波薄盘激光器对10 mm厚钢板进行了全熔透激光焊接。在焊接过程中，用两台高速摄像机对熔池上表面和下表面进行了同步观测。下表面比上表面长得多，也更不稳定。采用三维激光深熔焊接模型，将流体体积法(VOF)与光线跟踪算法相结合，对激光全熔透焊接过程中小孔与熔池的动态耦合进行了数值模拟。计算得到的焊缝上、下侧截面形态和熔池长度与实验结果吻合较好。分析了激光全熔透焊接过程中下侧熔池的演化，识别和讨论了激光全熔透焊接过程中能量耦合、熔池行为和小孔动力学的周期性特征。(C)2014爱思唯尔公司版权所有。
Full penetration laser welding was carried out on a 10 mm steel plate using a 16 kW maximum power continuous wave thin disk laser. Upper surface and lower surface of molten pool were observed synchronously with two high speed CCD cameras during the welding process. The lower surface was much longer and more unstable than the upper one. A three dimensional laser deep penetration welding model in which volume of fluid (VOF) method was combined with a ray-tracing algorithm was used to simulate the dynamic coupling between keyhole and molten pool in laser full penetration welding. The calculated weld cross-section morphology and molten pool length on both upper side and lower side agree well with experimental results. Evolution of molten pool in lower side during full penetration laser welding was analyzed, periodical features of energy coupling, molten pool behavior and keyhole dynamics in laser full penetration welding were identified and discussed.(C) 2014 Elsevier B.V. All rights reserved.