[China Aluminum Industry Net] Basic Profile of Hot Rolling Hot Rolling is a slab of aluminum ingot with a thickness of 300-500mm, rolled at a temperature above the recrystallization temperature, and after being heated, rolled on hot rolling equipment to Various thickness products, (required for finish rolling). Second, many materials require high corrosion resistance, fatigue resistance, and strong plasticity, which require hot rolling. Hot rolling is a processed structure with more than 90% of thermal deformation. During the process of large plastic deformation, the internal structure undergoes multiple recovery and recrystallization. The coarse grains in the as-cast state are fractured and the micro-cracks are healed. The blank is internally organized. The homogenization, the size and shape of the crystal grains, and the casting defects such as point defects and line defect concentration changes have all been significantly improved, and the as-cast microstructures have been transformed into deformed structures, which has greatly improved the metal processing performance. Especially in the deep-drawing performance, the hot-rolled material has the unparalleled advantage of cast-rolled material.
Advantages of Hot Rolling Hot rolling can weld partial defects such as porosity, shrinkage pores and intercrystalline microcracks in the ingot without causing subsequent processing internal structural defects. The grain of the ingot is fine and the properties are uniform. . The surface quality of hot-rolled aluminum sheet is good, and the mechanical properties and ductility are strong, and the oxidation effect is good.
Hot-rolled product classification 1. Hot-rolled thick plate: Aluminum and aluminum alloy plate with a thickness of not less than 7.0 mm. The main varieties are hot-rolled plates, annealed plates, quenched or quenched pre-stretched plates, and the like. Hot-rolled slabs are usually produced on block mills in hot rolling mills. The traditional process flow is: ingot homogenization—milling—heating—hot rolling—scaled shearing—straightening.
2. Hot-rolled coils: Aluminum and aluminum alloy sheet strips with a thickness of less than 7.0 are usually produced by hot-rolled coils. The products are mainly used as cold-rolled billets and also as production sheets. The modern production process is: ingot milling - Heating (Integral Heating and Heating Integration) - Hot Rough Rolling - Hot Continuous Compression - Hot Rolling Process for Balancing Weighed Aluminum Sheets
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