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A red-hot metal workpiece is inserted into a forging press. Plastic deformation involves using heat or pressure to make a workpiece more conductive to mechanical force. Historically, this and casting were done by blacksmiths, though today the process has been industrialized. In bulk metal forming, the workpiece is generally heated up. Cold ...
Rolling schematic view Rolling visualization. In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness, to make the thickness uniform, and/or to impart a desired mechanical property.
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The versatility of the method makes it popular in a number of applications including repair work and construction. [10] Gas metal arc welding (GMAW), commonly called MIG (for metal/inert-gas), is a semi-automatic or automatic welding process with a continuously fed consumable wire acting as both electrode and filler metal, along with an inert ...
Metal working was principally in gold, silver, tin and lead, with some copper work known in what is now Michoacán. [3] [4] Gold was generally obtained in powder or pellet form in rivers and streams from various sites in Guerrero, Oaxaca, Michoacán, the Central Highlands and the Mayan region.
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