Metals lost to time
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When it is later heat tempered, the metal part undergoes an increase of temperature up to approximately 149 degrees Celsius. Next, the metal part is maintained at a temperature of roughly minus 190 degrees Celsius for about a day. The slow cooling process helps prevent thermal stress of the metal.
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METALS LOST TO TIME FULL
Quenching, which can be done with water, oil, and other media, hardens steel at the same temperature that full annealing does. The quenching process stops the cooling process from altering the metal's microstructure.
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Less expensive than annealing, quenching is a heat treatment method that quickly returns metal to room temperature after it is heated above its upper critical temperature.In this process, the metal is heated above its upper critical temperature to change its microstructure. It softens metal, making it more workable and providing for greater ductility. Annealing is a form of heat treatment that brings a metal closer to its equilibrium state.
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