Combined Research of Flux and Welding Parameters and Influence of Chemical Composition and Mechanical Properties of Submerged Arc Welding: A Review
- March 12, 2020
- Posted by: RSIS
- Categories: IJRSI, Mechanical Engineering
International Journal of Research and Scientific Innovation (IJRSI) | Volume VII, Issue II, February 2020 | ISSN 2321–2705
Ram Gopal Verma
(Research Scholar), Department of Mechanical Engineering, Rajshree Institute of Management and Technology, Bareilly, U.P, India
Abstract: Submerged Arc Welding (SAW) can be employed for an extremely wide range of work piece. The method is suitable for butt welding and fillet welding of such applications as structural members in ship, manufacture of pressure vessels, bridge beams, massive water pipes, thin sheet shells and so on. Rotatable designs based on statistical experiments for mixtures have been developed to predict the combined effect of flux mixture and welding parameters on submerged arc weld metal chemical composition and mechanical properties. Bead-on-plate weld deposits on low carbon steel plates were made at different flux composition and welding parameter combinations. The results show that flux mixture related variables based on individual flux ingredients and welding parameters have individual as well as interaction effects on responses, viz. weld metal chemical composition and mechanical properties. In general, two factor interaction effects are higher than the individual effect of mixture related variables. Amongst welding parameters, polarity is found to be important for all responses under study.
Keywords- SAW, Rotatable mixture designs, Mixture related variables, Heat input, Electrochemical reaction and with two area ratio.
I. INTRODUCTION
Submerged arc welding (SAW) is a process that melts and joins metals by heating them with an arc established between a consumable wire electrode and the metals, with the arc being shielded by a molten slag and granular flux. This process differs from the arc welding processes discussed so far in that the arc is submerged and thus invisible. The flux is supplied from a hopper, which travels with the torch. No shielding gas is needed because the molten metal is separated from the air by the molten slag and granular flux. Direct-current electrode positive is most often used. However, at very high welding currents (e.g., above 900A) AC is preferred in order to minimize arc blow.
