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What is weld pool?
A small "pool" of molten metal that is manipulated to crate a weld bead.
What fluxing agents act as scavengers in the molten weld pool?
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What electrodes would you select to produce a weld with shallow penetration E6010 or E6011 or E6013 or E7018?
E6013
What is dual shield welding?
Welding process that uses both flux core, within the wire, and gas to protect the molten weld pool from contamination.
What happens if the GMA welding electrode is allowed to strike the base metal outside of the molten weld pool?
It is possible for the welding process to stop. Without the resistance of the hot molten metal, high amperage surges occur each time the electrode tip touches the base metal. This results in a loud pop and a shower of sparks. The same thing occurs each time a new weld is started.
What is the role of silicon in welding electrodes?
Silicon is used to lower the viscosity of the weld puddle. This allows better flow of the molten weld puddle.
Why use a backing plate for the butt weld?
To support the molten metal while it is cooling
What is a penetration weld?
a weld that does exactly what it sounds like, the molten metal that is created when welding is created all the way through the materials being welded. for example, if it is a 1/16th inch steel plate, a full penetration weld would create a molten bead from the front to the back of the plate. A full pin weld is when u have a bevel on one side that u weld first flip it over arc air gouge the other side and weld that side up
What is the main difference between filler rods and electrodes?
Filler rods are used to add metal to a molten weld pool during the welding process and electrodes actually have electricity running through them to deposit metal into the weld with the exception of TIG welding where the tungsten electrode is used solely for heat.... Hope this was helpful
Why argon is used in welding the recycling companys workbenches?
Argon is used as a shielding gas. By flooding the are of the weld with Argon, Oxygen is kept away from the molten metal of the weld.
Can you weld in outer space?
Yes, you could. When we weld, we use several different techniques. They will work out there in space. For instance, if you have an electric welder, it will still pour out a bunch of electric current when an arc is struck. The arc and the following current will create the molten metal "pool" at the site of the electrode and the work just like on earth, and you can create a bead. But you won't have to worry about the effects of air on your weld. No flux will be required to prepare or keep your material clean. Certainly if we wanted to trouble ourselves to haul up welding gas to weld, we could do that, too.
What are the causes of slag inclusion?
Slag inclusions are nonmetallic solid material entrapped in weld metal or between weld metal and base metal. Slag inclusions are regions within the weld cross section or at the weld surface where the once-molten flux used to protect the molten metal is mechanically trapped within the solidified metal. This solidified slag represents a portion of the weld's cross-section where the metal is not fused to itself. This can result in a weakened condition which could impair the serviceability of the component. Inclusions may also appear at the weld surface. Like incomplete fusion, slag inclusions can occur between the weld and base metal or between individual weld passes. In fact, slag inclusions are often associated with incomplete fusion. Daniel
