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The features of hot rolled aluminum sheet

Edit:Mingtai Date: 2019-05-03 14:43
Hot rolling generally refers to rolling performed above the metal recrystallization temperature. In hot rolling, the deformed metal has both hardening and softening processes. Due to the influence of the deformation speed, as long as the recovery and recrystallization process are too late, the metal will have a certain degree of work hardening as the degree of deformation increases. However, in the hot rolling temperature range, the softening process plays a leading role. Therefore, at the end of hot rolling, the recrystallization of the metal is usually incomplete, and the aluminum alloy sheet strip after hot rolling exhibits a state of recrystallization in which the recrystallized and deformed structures coexist.
Features of hot rolled aluminum sheets.
1. Hot rolling can significantly reduce energy consumption, good plastic processing, low deformation resistance, inconspicuous work hardening, easy rolling, and reduced energy consumption required for metal deformation.
2. Hot rolling usually adopts large ingots and large reduction rolling, which has a fast production rhythm and large output, which creates conditions for large-scale production.
3. Hot rolling can effectively improve the processing performance of metals and alloys, that is, the coarse grains in the as-cast state are broken, the microcracks are healed, the casting defects are reduced or eliminated, the as-cast microstructure is transformed into a deformed structure, and the processing property of the metal is improved.
4. The as-cast structure is transformed into a processed structure by hot rolling, and the plasticity of the material is greatly improved by the transformation of the structure.
5. The characteristics of the rolling method determine the anisotropy of the properties of the rolled sheet. First, the longitudinal, transverse and high directions of the material have obvious performance differences. Second, there are deformation textures and recrystallization textures. There is a clear directionality in the performance of the system.
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