Abstract
The wire feed laser welding has significant merits in metal joining technology for the manufacturing industry, which including high energy efficiency, high welding speed, automated workflow and narrow heat-affected zone. During to the interaction between weld pool and welding wire, the welding process is more complicated. In this work, a numerical model to the wire feed laser welding for the liquid bridge transition was built. By constructing a movable welding wire entity accurately, the simulation result for flow and heat transfer inside weld pool and welding wire were acquired by the numerical solution. The temperature field, velocity field and weld appearance can be obtained by simulation results. The results shown that the rapid wire feed speed will increase the heat absorption of welding wire, which can improve the hardness due to higher cooling rate. Through the analysis of experimental and simulation results, the quantitative relationship between weld parameters and weld result can be obtained. The numerical simulation can guide the optimization of welding parameters and control the weld appearance.
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