Simulation Study of Keyhole Formation during Laser Deep Penetration Welding

摘要：

　　The elaborated model solves the coupled equations of a laminar fluid flow and heat transfer to predict the temperature distribution in the weld pool.The enthalpy-porosity technique was employed to account for the latent heat during melting and solidification.The coupled effects of buoyancy and Marangoni forces are considered in this model.The volume-of-fluid (VOF) method was employed to track free surfaces of weld pool.The molten temperature distribution,velocity field and molten shape were calculated using FLUENT software.The results clearly demonstrate Marangoni flow significantly alters the characteristics of the thawing and solidifying process,and makes the molten wider and shallower.

关键词： Laser Welding Keyhole Free Surface Recoil Pressure

作者: R.P.Wang Y.P.Lei

作者单位: School of Material Science and Engineering, Beijing University of Technology, Beijing, China

会议类型: 国际会议

会议名称: the 2010 International Conference on Frontiers of Manufacturing and Design Science(第一届制造与设计科学国际会议(ICFMD 2010))

会议地点: 重庆

会议语种:英文

页码: 400-403

在线出版日期: 2010-12-11（万方平台首次上网日期，不代表论文的发表时间）