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Spray transfer GMAW. Gas metal arc welding (GMAW), sometimes referred to by its subtypes metal inert gas (MIG) and metal active gas (MAG) is a welding process in which an electric arc forms between a consumable MIG wire electrode and the workpiece metal(s), which heats the workpiece metal(s), causing them to fuse (melt and join).
A transformer-style welding power supply converts the moderate voltage and moderate current electricity from the utility mains (typically 230 or 115 VAC) into a high current and low voltage supply, typically between 17 and 45 (open-circuit) volts and 55 to 590 amperes.
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.
Based on the I-220 but with a Mikulin AM-42B or AM-42FB engine and metal wings and cockpit. Two built. [1] MiG-11 Designation reserved for an unbuilt production version of the I-220. [1] MiG-7 Designation reserved for an unbuilt production version of the I-222. [1] Not to be confused with the experimental MiG-3 variant of the same name.
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