Three-Dimensional Transient Model of Keyhole Dynamics During Laser Deep Penetration Welding
The three-dimensional transient unified mathematical model of vapor phase, liquid phase and solid phase was proposed during laser deep penetration welding. The heat source was derived from the ray-tracing model. The enthalpy-porosity technique was used for modeling the solid/liquid phase change process, used the VOF method to trace the vapor/liquid free surface. The roles of main driving force -surface tension, hot buoyancy and recoil pressure were considered in the welding metal pool. Transient changes process of keyhole and molten pool, and temperature distribution were obtained by numerical simulation when the welding speed was 100mm/s. The numerical simulation results of welding molten pool shape provided a good agreement with the actual welding results.
laser deep penetration welding keyhole metal pool numerical simulation
R.P.Wang Y.P.Lei Y.W.Shi X.Y.Li
School of Material Science and Engineering, Beijing University of Technology, Beijing, P.R.China
国际会议
北京
英文
43-47
2010-10-25（万方平台首次上网日期，不代表论文的发表时间）