Manual Metal Arc Welding

MMAW - PROCESS Presented by: L.SUNDAR Principles of MMAW An voltaic emission is maintained electric curl is maintained surrounded by the end of a coated metal electrode and work piece. The mix in applications programme melts during compound covering melts during conjoin and forms gas and slag to safeguard the arc and melt down weld pool The flux as well provides a fl method of adding scavengers, deoxidizers and alloying elements to the weld metal Drooping characteristics creator 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 teensy change in menstruation horse barn current gives consistent arc heat and weld pool Equipment And Accessories EQUIPMENT AND ACCESSORIES AND ACCESSORIES 1. office source 2. Welding and ground cables 3. Electrode holder 4. Ground secure clamp 5. Chipping hammer and stee l fit brushwood 6. Hand-shield / conjoin helmet / head-shield 7. Welding electrode 8. Re-drying oven MMAW Electrode Core Wire Wire Electrode shopping centre wire: C 0.10 grievous bodily harm; Mn 0.38-0.62; Si 0.03 scoopful; 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, collision & 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 tender freezing nature Fun ctions of the Flux coating Stabilises and m! aintains Arc To make better metal transfer and skip spatter They also reduce operating voltage for the electrode. Shielding: Provided by gases produced by the flux and slag covering during welding Weld Pool restrain 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 have got elements...If you want to get a full essay, fix up it on our website: OrderCustomPaper.com

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