Welding Definition

Welding may be a fabrication or sculptural method that joins materials, typically metals or thermoplastics, by inflicting coalescence.

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this can be typically made by melting the workpieces and adding a filler material to firmly type a pool of molten material ( the weld pool ) that cools to get a powerful joint, with pressure typically used in conjunction with heat, or by itself, to provide the weld. this can be in distinction with soldering and brazing, that involve melting a lower-melting-point material connecting workpieces to firmly type a bond between them, while not melting the workpieces.

several totally different energy sources can possibly be used for welding, as well as a gas flame, an electrical arc, a laser, an electron beam, friction, and ultrasound. whereas typically an industrial method, welding is also performed in several totally different environments, as well as open air, below water and in outer house. 

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welding may be a potentially hazardous undertaking and precautions are needed to firmly avoid burns, electrical shock, vision harm, inhalation of poisonous gases and fumes, and exposure to firmly intense ultraviolet radiation.