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TIP TIG welding torch. TIP TIG is a subset of gas tungsten arc welding (GTAW), using a mechanism called filler wire agitation to enhance molten weld pool dynamics. This agitation has been found to enhance the weld puddle fluidity and release evolving gases, reducing the chances of inclusions and porosity, and also separate impurities.
GTAW weld area. Manual gas tungsten arc welding is a relatively difficult welding method, due to the coordination required by the welder. Similar to torch welding, GTAW normally requires two hands, since most applications require that the welder manually feed a filler metal into the weld area with one hand while manipulating the welding torch in the other.
Micro spot welders, used in a variety of industries, can go down to 1.5 kVA or less for precision welding needs. It is common for a spray of molten metal droplets (sparks) to be ejected from the area of the weld during the process. Resistance spot welding generates no bright arc, so UV protection is not required.
As a source of electrons for electron-beam welders, the material must fulfill certain requirements: To achieve high power density, the emission current density [A/mm 2], hence the working temperature, should be as high as possible, To keep evaporation in vacuum low, the material must have a low enough vapour pressure at the working temperature.
Welders at work, c. 1939. A welder is a person or equipment that fuses materials together. The term welder refers to the operator, the machine is referred to as the welding power supply. The materials to be joined can be metals (such as steel, aluminum, brass, stainless steel etc.) or varieties of plastic or polymer.
The ancient Greek historian Herodotus states in The Histories of the 5th century BC that Glaucus of Chios "was the man who single-handedly invented iron welding". [6] Forge welding was used in the construction of the Iron pillar of Delhi, erected in Delhi, India about 310 AD and weighing 5.4 metric tons. [7] Forge welding in 1904 [8]