Numerical Simulation and Analysis of Flow Field in TIG Arc Brazed Filler Metal Droplet
Arc brazing technology for joining has been recently developed. Because of its advantages, it has been used more and more frequently in the automobile industry, and this technology is widely used in practical joining applications. Many welding researchers have paid more and more attentions in this field. Based on the experimental analysis of CuSi3 filler metal spreading, wetting behavior on galvanized steel sheet and its interfacial microstructure in tungsten inert gas (TIG) arc brazing process, the governing equations and boundary conditions of filler metal droplets under the actions of gravitational force, surface tension and arc pressure force is conducted, then they have been transformed into finite volume equations, The flow behavior in filler metal droplet was calculated by PHOENICS code using SIMPLEST algorithm. It can be concluded that the flow adjacent to the surface controls the final droplet profile. And the average fluid flow velocity in the droplet is much higher than those in fusion welding pool, and this fluid flow does great contribution to the whisker-like intermetallic compound fragmentation behavior due to its stirring force at the interface. The simulation is useful to interpret the free surface evolving behavior and the final profile of filler metal droplet in arc brazing, it also provide a new idea about the interface growth behavior study and offer a practical guide in production.
Arc brazing flow field Numerical simulation filler metal
LI Ruifeng YU Zhishui QI Kai
Provincial Key Lab of Advanced Welding Technology, Jiangsu University of Science and Technology, Zhe School.Of Materials Eng., Shanghai University of Eng.Sci., Shanghai 201620, China
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）