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What are the characteristics of the hot rolling process? Hot rolling does not alter the hardness of the metal, is easier and faster, and allows for...

What are the characteristics of the hot rolling process?
Hot rolling does not alter the hardness of the metal, is easier and faster, and allows for extreme deformation. Deformations are deeper than in cold metalworking. High temperatures facilitate the formation of scale on the metal surface.
Cold rolling must be performed above the material's yield strength for deformation to be permanent.
When a metal is cold-worked, its crystals are deformed, causing an increase in hardness and mechanical strength, loss of ductility, and the formation of residual stresses. This phenomenon is known as work hardening.
Machines for cold metalworking must be able to exert much greater forces than those designed for hot metalworking, so they must be more robust.

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Processos de Fabricação I Universidade Estácio de SáUniversidade Estácio de Sá

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The characteristics of the hot rolling process are as follows: 1. Hot rolling does not alter the hardness of the metal: Unlike cold rolling, hot rolling does not significantly change the hardness of the metal being processed. 2. Easier and faster: Hot rolling is generally easier and faster compared to cold rolling. The metal is heated to high temperatures, which makes it more malleable and easier to shape. 3. Allows for extreme deformation: Hot rolling allows for greater deformation of the metal compared to cold rolling. The metal can be shaped into various forms and sizes due to its increased ductility at high temperatures. 4. Deformations are deeper than in cold metalworking: Hot rolling can achieve deeper deformations in the metal compared to cold metalworking processes. This is because the metal is more pliable and can undergo greater plastic deformation. 5. High temperatures facilitate the formation of scale on the metal surface: During hot rolling, the high temperatures facilitate the formation of scale on the metal surface. This scale is a layer of oxide that forms due to the reaction between the metal and the surrounding atmosphere. It's important to note that these characteristics are specific to the hot rolling process and may differ from other metalworking methods.

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