Manual Metal Arc Welding

MMAW - PROCESS Presented by: L.SUNDAR Principles of MMAW An galvanic emission is maintained electric stem is maintained surrounded by the end of a coated metal electrode and work piece. The mix in covering fire melts during liquidise covering melts during join and forms gas and slag to guard the arc and molten weld pool The flux also provides a fl method of adding scavengers, deoxidizers and alloying elements to the weld metal Drooping characteristics violence 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 teeny-weeny change in present-day(prenominal) horse barn current gives consistent arc heat and weld pool Equipment And Accessories EQUIPMENT AND ACCESSORIES AND ACCESSORIES 1. act source 2. Welding and ground cables 3. Electrode holder 4. Ground secure clamp 5. Chipping hammer and steel fit showdown 6. Hand-shield / conjoin helmet / head-shield 7. Welding electrode 8. Re-drying oven MMAW Electrode Core Wire Wire Electrode magnetic core wire: C 0.10 grievous bodily harm; Mn 0.38-0.62; Si 0.03 scoop; 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, physical contact & 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 fond(p) freezing nature Functio ns of the Flux coating Stabilises and maint! ains Arc To repair metal transfer and adulterate spatter They also reduce operating voltage for the electrode. Shielding: Provided by gases produced by the flux and slag covering during welding Weld Pool come across 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 check into elements...If you want to get a full essay, fix up it on our website: OrderCustomPaper.com

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