Explanation

The process of hot rolling ingots into sections of various cross section shapes by using a rolling mill with pass shaped rollers. The sectional shapes of profiles are various, and the deformation degree of each part during rolling varies greatly. Simple section section steel, such as bar, is mostly used for building reinforcement and manufacturing mechanical parts, while complex section section steel is mostly used for building structures, bridges and various engineering components. The raw materials used for rolling section steel mainly include blooms, continuous casting billets and forging and pressing billets. Small steel ingots are used for rolling in some cases. Profile billets can be used when producing H section steel with wide wingspan. The cross-sectional size of the general bloom is 50mmX150mm (300mmX300mm), while the continuous casting is described as (50mmX50mm) (350mmX350mm). The layout of profile rolling mill includes horizontal type, cross-country type, checkerboard type, tandem type, semi continuous type and continuous type. Different forms are selected according to production varieties and production scale. The roll pass design of complex section profile is very important, which not only ensures to obtain the appropriate shape and size, but also ensures the uniformity of the structure and performance of different parts of the workpiece. N-type superconductors see hole type doped superconductor. For P-type superconductors, see electron doped superconductor (.

Classification