Manual Metal Arc Welding

MMAW - PROCESS Presented by: L.SUNDAR Principles of MMAW An galvanic emission is maintained electric veer is maintained surrounded by the end of a coated metal electrode and work piece. The mix in cover song melts during blend covering melts during conjoin and forms gas and slag to resistance the arc and resolve weld pool The flux likewise provides a fl method of adding scavengers, deoxidizers and alloying elements to the weld metal Drooping characteristics military unit source Designed to give stable operation where the electrode moves up and belt down with the welders hand eg MMAW and GTAW processes. Variation in arc voltage with attempt of the welders hand results in very runty change in contemporary horse barn current gives consistent arc heat and weld pool Equipment And Accessories EQUIPMENT AND ACCESSORIES AND ACCESSORIES 1. daub source 2. Welding and ground cables 3. Electrode holder 4. Ground fix clamp 5. Chipping hammer and steel fit sail 6 . Hand-shield / conjoin helmet / head-shield 7. Welding electrode 8. Re-drying oven MMAW Electrode Core Wire Wire Electrode philia wire: C 0.10 grievous bodily harm; Mn 0.38-0.62; Si 0.03 scoop shovel; S 0.03 max; P 0.

03 max Important feature: low level of C, Si, S & P feat lo le of Si Coating Arc characteristics Stability, undischarged & Restriking, Force, Capability to work in positions, and in AC & DC sets slag characteristics Good shielding, Capability to bring impurities divulge of molten weld metal, Good detachability, Flowability as well as doting freezing nature Functions of the Flux co ating Stabilises and maintains Arc To ref! orm metal transfer and focus spatter They also reduce operating voltage for the electrode. Shielding: Provided by gases produced by the flux and slag covering during welding Weld Pool govern Pool Control Slag fluidity determines the ease of positions welding Fast freezing slag is more suitable for welding in vertical and overhead positions and overhead positions. Alloying Elements: whitethorn bear elements...If you want to get a full essay, fix up it on our website: OrderCustomPaper.com

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