Manual Metal Arc Welding

MMAW - PROCESS Presented by: L.SUNDAR Principles of MMAW An galvanising emission is maintained electric twist is maintained surrounded by the end of a coated metal electrode and work piece. The mix in masking melts during liquidise covering melts during weld and forms gas and slag to entertain the arc and melt weld pool The flux besides provides a fl method of adding scavengers, deoxidizers and alloying elements to the weld metal Drooping characteristics force out 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 weensy change in rate of flow horse barn current gives consistent arc heat and weld pool Equipment And Accessories EQUIPMENT AND ACCESSORIES AND ACCESSORIES 1. view source 2. Welding and ground cables 3. Electrode holder 4. Ground secure clamp 5. Chipping hammer and steel fit wash 6. Han d-shield / conjoin helmet / head-shield 7. Welding electrode 8. Re-drying oven MMAW Electrode Core Wire Wire Electrode result wire: C 0.10 grievous bodily harm; Mn 0.38-0.62; Si 0.03 guck; 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, bang & 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 Functions of the Flux coating Stabilises and maintains Arc To modify metal transfer an! d stifle spatter They also reduce operating voltage for the electrode. Shielding: Provided by gases produced by the flux and slag covering during welding Weld Pool manage 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 film elements...If you want to get a full essay, fix up it on our website: OrderCustomPaper.com

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