Hot rolling generally refers to rolling performed above the metal recrystallization temperature. During hot rolling, the deformed metal undergoes hardening and softening processes at the same time. Due to the influence of deformation speed, as long as the recovery and recrystallization process is too late, the metal will produce a certain amount 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 plate and strip after hot rolling presents a microstructure state in which recrystallization and deformation structure coexist.
Hot-rolled aluminum alloy 6061 t6 products are generally divided into two categories, one is hot-rolled thick aluminum plate, and the other is hot-rolled aluminum coil. Hot-rolled thick aluminum plate 6061 t6 refers to aluminum alloy plate with a thickness of not less than 0.7mm. The main varieties include hot-rolled plate (t6), annealed plate (o), quenched or quenched pre-stretched plate, etc. Aluminum and aluminum alloy sheets and strips with a thickness less than 7.0mm are produced by the coil method, and the main task is to provide ingredients for cold rolling. Hot rolled 6061 t6 aluminum sheet is a high-quality aluminum alloy product produced by heat treatment and pre-stretching process. Although its strength cannot be compared with 2XXX series or 7XXX series, it has many characteristics of magnesium and silicon alloys, excellent processing performance, and excellent welding Features and electroplating, good corrosion resistance, high toughness and no deformation after processing, dense material without defects and easy to polish, easy to color film, excellent oxidation effect and other excellent characteristics.
Features of hot rolled 6061 t6 alloy aluminum sheet:
1. Hot rolling can significantly reduce energy consumption, good plastic processing, low deformation resistance, no obvious work hardening, easy rolling, and reduced energy consumption required for metal deformation.
2. Hot rolling usually uses large ingots and large reductions for rolling. The production rhythm is fast and the output is large, which creates conditions for large-scale production.
3. Hot rolling can effectively improve the processing performance of aluminum alloy 6061 t6, that is, the coarse grains in the casting state are broken, the micro-cracks are healed, the casting defects are reduced or eliminated, the as-cast structure is transformed into a deformed structure, and the processing performance of the metal is improved.
3. The as-cast structure is transformed into a processed structure through hot rolling, and the plasticity of the material is greatly improved through the transformation of the structure.
4. The characteristics of the rolling method determine that there is anisotropy in the properties of the rolled aluminum alloy 6061 t6 sheet. First, there are obvious performance differences in the longitudinal, transverse and high directions of the material. Second, there are deformation textures and recrystallization textures. There is an obvious directionality in control performance.