Scholarly record
THE INFLUENCE OF THE WAY OF DEPOSITING THE FILLER MATERIAL ON THE GEOMETRICAL CHARACTERISTICS OF THE WELD BEAD
Abstract
The welding characteristics of the welded joints are directly influenced by the thermal conditions applied during welding. At the same time, the welding type process influences the geometry of the welded seam, the nature and the extent of the structural transformations, the tensions and deformations level, as well as the values of the mechanical characteristics of the welded bead (yield strength, hardness, toughness etc.) The paper presents the experimental procedure, the results and the conclusions on the influence of the way of depositing the filler material on the geometrical characteristics of the welded beads obtained by tungsten inert gas (TIG) welding process in two different situations: cold and hot wire welding. Fallowing the analysis of the obtained results it can be observed that the insertion of the filler material in the molten metal bath, in case of TIG welding, influences the heat balance of the welding process, meaning that a part of the heat generated by the electric arc is used to melt the filler material in the detriment of the base material. The energy loss can be compensated either by increasing the value of the welding current or by preheating the filler material before it is introduced into the molten metal bath.
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References10
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