Raw Material For Hot Rolled Ferrous Metal: Hot roll steel product is an outcome of a metal rolling process that happens above the re-crystallization temperature of the metal. The raw material is typically big fragments of crude metal, for instance semi-finished casting items known as slabs, blooms, and billets.
Industrial Process Governing Hot Rolled Ferrous Metal: The metal billets or slabs are rolled from hot working rolls and the rollers produced a flat product that can be formed in coils as well as in hot rolled plates. There are two types of flat products resulting from a hot roll mill i.e. Plates or HR coils. More often plates are utilized directly. The HR coils (HRC) are utilized directly, but in addition to it, most of them are additively rolled and routed to manufacture products for example cold rolled sheets coils, galvanized or gal annealed sheets and coils, pipes etc.
Limitations of Hot Rolled Ferrous Metals: Hot rolled metals usually have bit minimal directionality in their mechanical properties and deformation provokes left over or residual stresses. On the other hand, in specific examples non-metallic insertion will convey few directional properties.
Properties: The hot roll work pieces less than 20 mm thickness equivalent of 0.79 in thickness often have some directional properties. In addition, non-uniformed cooling will stimulate numerous residual stresses, which typically exists in structures that have a distinct cross-section, for example I-beams and H-beams.
Quality Characteristics & application: The hot roll product is of good quality, but the facade is in mill scale. A mill scale is defined as an oxide that creates at high-temperatures. Mill scale is typically extricated though a process called pickling.
Dimensional tolerances in hot roll steel are typically two to five percent of the complete dimension. Hot rolled mild steel appears to have a bigger tolerance for quantity of percentage carbon. In addition for metals, hot rolled appears to characteristically be additional costly. Hot roll products have variety of uses mainly to produce sheet metal or simple cross sections.
Ginzburg, Vladimir B. and Robert Ballas. Flat Rolling Fundamentals. CRC Press, 2000.