1. Aluminum and aluminum alloy sheets and strips are supplied in hot rolled state, annealed state, various levels of soft state and various heat treatment states.
2. Preparations before hot rolling mainly include ingot quality inspection, soaking, sawing, face milling, aluminum cladding and heating.
3. The cooling rate is very high during semi-continuous casting, the diffusion process in the solid phase is difficult, and the chemical composition and structure are easy to form inside the ingot, such as intragranular segregation, which reduces the plasticity
4. When there are defects such as segregation floats, slag inclusions, scars and cracks on the surface of the ingot, it should be milled (see non-ferrous metal alloy ingot milling), which is an important factor to ensure the good surface quality of the finished product
5. Hot rolling: The hot rolling of aluminum alloy ingots is to provide blanks for cold rolling, or to directly produce thick plates in hot rolling state.
6. The hot rolling process system includes pass reduction rate, rolling temperature, rolling speed, lubrication and cooling, etc.
