Research on Arc Morphology and Keyhole Behavior of Molten Pool in Magnetically Controlled Plasma-GMAW Welding

In the magnetically controlled Plasma-GMAW welding process, composite arc forms a keyhole in workpiece to be welded. order explore effect of process parameters on coupling, weld pool and keyhole, behavior characteristics side information were collected using acquisition system high-speed camera during bead-on-plate welding. The image is processed by pseudo-color enhancement technology, molten analyzed boundary extraction algorithm coordinate conversion algorithm, entrance width are obtained. It found that coupling degree two arcs increases with increase plasma current, GMAW current magnetic field intensity. With size inlet increases; decreases, wave crest increases. intensity, intensity metal oscillation between increases, so does crest.