Submerged,Arc,Welding,One,the, technology Submerged Arc Welding

Date:2020-12-25 Submerged,Arc,Welding,One,the, technology

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Welding Submerged


One of the most common welding techniques is the SubmergedArc Welding (SAW). It is important to note that this was one of the first typesof welding to get a patent. To do this type of welding there needs to be anelectrode that is either tubular or solid (consumable). This will need acontinuous feed as well.  In order to protect the weld and the arc zone they are"submerged" to protect them from contamination from the atmosphere.Fusible flux that includes lime, silica, manganese oxide or calcium fluoride isused under a blanket. Other compounds can be used as well.  As it melts the flux acts as a conductor and creates a pathfor the current that moves between the electrode and the work that is beingdone. This creates a thicker layer of the flux and it covers the metal as itmelts. By doing this process there is no spatter or sparks because the flux iscovering everything. This process will also suppress any ultraviolet radiationor fumes that will from this Submerged Arc Welding (SAW) process. Most welders will do this process in either an automatic ormechanized mode of operation but some of the other types of guns like thesemi-automatic ones (that are hand held) can be used since they have apressurized or a gravity type of flux feed. Usually you will have to use thisin either the flat or horizontal fillet positions. The SAW technique of welding uses a standard wire and it canalso use some of the specialty forms. A good wire for this filler material willbe between 1/16 and ¼ inches thick. Sometimes welders have used a wire that istwisted so the arc will begin to oscillate. Sometimes this will be helpful tofuse the bottom of the weld and the base metal together. There are several advantages to using SAW which include: ·        It has a high deposition rate and it canpenetrate the weld deeply.·        When you have designed a good process and youhave control over what you are doing you can be sure that you get a strongweld.·        You can actually do this with thin sheets ofsteel and they can be done at a higher speed.·        There are very minimal fumes or arc lights whichmakes this a safer process.·        You can do this indoors or outdoors.·        You don't have a lot of distortion.·        You don't get any spatter on the weld becausethe arc is always under the blanket of flux. As with any technique there are a few limitations with theSAW method that include: You are limited to only a few positions that you can use this within.You can only use steel, stainless steel or a few nickel based metals.The flux handling systems can be more complex and difficult to use.Slag is a problem in a couple of ways: you canget residue from it that may cause some issues with your health or with safetyand it will require a complicated slag removal system.
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