Metal Transfer Studies In Shielded Matel Arc Welding (SMAW)

S, Thiruchitrambalam and Imran Syakir , Mohamad and Shafizal , Mat (2012) Metal Transfer Studies In Shielded Matel Arc Welding (SMAW). Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

In spite of the importance of investigating the metal transfer in arc welding processes, there has been little work devoted to the systematic and quantitative analyses of mechanism of metal transfer. This is because of the fact that the mechanism of metal transfer is too difficult to establish since the arc is partially obscured by fume. Also, in many cases, a deep cavity formed by the covering hides the tip of the electrode from view. In the present investigation therefore, a comparison study of metal transfer occurring at different weld conditions was planned in arc welding process. The transfer behavior was characterized by recording and capturing the images by using a high speed camera and analyzing it through computer software. The metal transfer pattern was understood and recognized with the published results of several kinds of metal transfer modes for the shielded metal arc welding and relative important parameters were recorded. Mild steel was considered as base metal for the study to investigate the relationship between the welding parameters related to the weld bead geometry and a correlation was made with the ensuing metal transfer modes. It was found through the studies conducted that the factorial techniques could be effectively employed for developing statistical models for predicting the weld-bead geometry and shape factors within the design limit of the parameters. Computer interfaced real time analysis of recorded images of metal transfer is an effective tool to study the mode of metal transfer during welding.

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