Hot Rolling Steel Plate and Steel Belt
Hot rolling of steel is a process of forming steel into different shapes and sizes by passing it through two rolls at room temperature and a pair of rollers heated to above the recrystallization temperature of the steel material. Hot rolling is commonly used to produce steel sheet and strip products such as: sheet, coil and plate for a variety of industrial applications.
Hot rolling is one of the oldest and most common processes used to form steel alloys. The process dates back to the early 19th century when iron bars were first passed through rollers to produce round cross-section rods and bars. Since then, it has been refined to produce a range of steel products, from simple shapes and alloys to intricate products with complex cross-section geometries. Hot rolling of steel products is further improved by adding heat-treating processes during production.
Hot rolled steel has a number of advantages over cold-rolled steel. For example, it offers a larger reduction in size when compared to other rolling processes, is suitable for producing structurally sound steel parts, and its mechanical properties are improved by the hot-rolling process. Hot-rolled steel products have also become popular in fabricating components and structural elements such as beams, columns, frame members, bridges, weldments, and other structural components.
In hot rolling of steel, the starting material is usually in semi-finished form, such as slabs, blooms, ingots, or billets. The hot-rolling process begins with heating these semi-finished materials to temperatures above their recrystallization temperature. Once the temperature of the material is at the point of recrystallization, pressure is then applied to the material to reduce its thickness and to form it into its desired shape. The reduction in thickness is achieved by applying pressure to the materials surface using a pair of rollers. These rollers are normally made from cast steel, and the pressure between them is controlled to maintain proper work piece geometry and surface finish.
The hot-rolling process is used to produce continuous strip steel and steel plates. The steel strip can be hot rolled in various shapes such as flat, sheet or strip to a specified width and thickness while the steel plate can be hot rolled into strips, plates or sheets. Hot rolling is also commonly used for manufacturing steel belts and coils. The steel strips produced by hot rolling are usually galvanized before being wound in a continuous loop and fed into the machine for further operations.
The GB/T2519-1988 standard applies to hot rolling for steel plate, coils, sheet and other steel products with a thickness not exceeding 16mm. The GB/T2519-1988 standard covers the requirements related to quality, size deviation, flatness, straightness, surface roughness and other essential characteristics of hot-rolled steel products. It also includes requirements for the type of raw material being used, the production process, inspection and testing, and product marking.
In conclusion, hot rolling of steel is an essential process in the production of a variety of steel products, including steel plates, belts and coils. It is a cost-effective and efficient process that provides high-quality steel products with improved mechanical properties. The GB/T2519-1988 standards are used to ensure the quality of hot-rolled steel items and products.
