Hot rolling process is the most commonly used technique in metal material processing, which involves pressure processing of metal materials at high temperatures to form the desired shape and size. This process is widely used in industries such as steel manufacturing and non-ferrous metal processing, and has advantages such as high efficiency, energy saving, and easy implementation. The main steps of hot rolling process include raw material preparation, pretreatment, heating, hot rolling, cooling, and finishing.
1.Raw material preparation: Hot rolled raw materials are usually metal billets such as steel billets or copper billets, which are usually manufactured by casting, forging, and other processes. Before hot rolling, it is necessary to inspect, classify, and stack the billets to ensure their quality and process requirements.
2.Preprocessing: Preprocessing includes cutting, slicing, trimming, dust removal, and other operations, with the aim of trimming the billet into the desired shape and size for subsequent processing operations.
3.Heating: The hot rolling process requires heating the metal billet to a certain temperature, usually above the yield point. Heating methods can include salt bath furnaces, electric furnaces, and gas flame heating. The purpose of heating is to improve the plasticity of metal materials for subsequent deformation processing.
4.Hot rolling: Hot rolling is the core step of the hot rolling process, which involves feeding heated metal billets into a rolling mill and gradually transforming them into the desired shape and size through a series of rolling actions. During rolling, the metal billet undergoes plastic deformation, final rolling, and other processes to form the required material.
5.Cooling: Hot rolled metal materials need to undergo appropriate cooling measures to cool and fix their internal structure, so that the metal material has the required mechanical properties. The cooling method can be water cooling, air cooling, etc., depending on the material and process requirements.
6.Sorting: Sorting is a process of finishing hot-rolled metal materials, including sawing, grinding, cleaning, and other operations, to obtain a smooth surface and precise dimensions.
In short, the hot rolling technique gradually transforms metal materials into the desired shape and size through pressure processing at high temperatures, and is widely used in industries such as steel manufacturing and non-ferrous metal processing. The hot rolling process has advantages such as high efficiency, energy saving, and easy implementation, but it also has disadvantages such as high energy consumption and high equipment investment. With the development of technology, hot rolling processes are constantly innovating and improving to meet different material and process requirements.
