what is shielded metal arc welding

what is SMAW – Shielded Metal Arc welding?

what is Shielded Metal Arc welding? Welding can be defined as “operation that produces coalescence of two or more members by applying heats or pressure or both, with or without the use of filler metal.” In fusion welding, members to be joined (base metals) are heated to melt with or without the use of filler metal (e.g. covered electrode), and then the molten parts produce coalescence of the base metals, followed by solidification. In pressure welding, the joining parts are given the thermal energy by friction or gas flame, and then mechanical pressure is applied to complete the welding process. In brazing or soldering, the brazing filler metal or solder that has a lower melting point than the base metal is fused, without melting the base metal, and then the fused filler metal is distributed between the closely fitted faying surfaces of the joint by capillary action. The brazing process uses a brazing filler metal, and the soldering process uses a solder with a relatively lower melting point. Of these metallurgical joining processes, the fusion welding process, particularly the arc welding process that uses the arc discharge for the heat source, is most widely used. The two types of manual[…]

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