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Contents of the issue
Aim of the work is the analysis of available references on mechanism of refinement of weld structure in arc welding under effect of controlling magnetic fields. It is shown that today different authors have various explanations of the facts of refinement of weld metal structural constituents or deposited metal in arc welding under effect of longitudinal magnetic field. There is no single solution between the authors on the most important factors determining refinement of the weld metal structural constituents in welding under effect of a longitudinal magnetic field. It is shown that peculiarities of effect of the longitudinal magnetic field on formation of secondary structures in a weld during arc welding also require investigation. It is not determined what is the stage where the weld metal structure refinement takes place under the effect of magnetic field, namely during primary solidification or during secondary transformations or simultaneously during these two stages. It is necessary to carry out investigations in this direction in order to develop the optimum parameters of the external magnetic fields for weld structure refinement in arc welding. 20 Ref., 1 Fig.
Keywords: weld metal structure refinement, crystalline particle, external magnetic fields, refinement factor
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