Hot-rolled steel sheet is a metal product of the simplest geometric configuration, which in modern production is a very popular consumable. The product has found application in various areas of the economy, in architecture, construction, civil and military aviation, in the manufacture of automobiles, machine tools, construction of bridges, in finishing works and design.
The popularity of this product is largely due to the rather low price of the hot-rolled sheet. In most cases, the product is purchased for further processing. For example, the metal is pulled and cut, thus obtaining a perforated exhaust sheet, from which street fences, armatures, stair steps and other products are subsequently made. Qualitatively produced hot-rolled sheet freely withstands rolling, stamping and drawing.
In the manufacture of steel materials are guided by the requirements of state standards. To produce hot-rolled steel sheets, hot rolling technology is used. To create the material, both low alloy and simple carbon steel are used. Hot-rolled sheet is produced by pressure treatment of metal heated to a high temperature on calibrated or smooth rolls. Products of this type are supplied in rolls or sheets.
Hot rolled sheet has the following characteristics. By accuracy of rolling, two classes of these materials are distinguished with a thickness of up to 1.2 centimeters. Class A includes products with increased accuracy, and category B - with normal. The mandatory qualitative characteristics of the products include the minimum values of resistance (temporary).
In addition, there is plate rental, which is divided into six groups. The first five characterize the production of hot rolled sheets. The latter category includes products with increased strength. Sheet materials are produced with normal, high and particularly high flatness.
The most complicated process for the production of hot-rolled steel sheets begins with the receipt of billets (slabs) at a metal processing enterprise. These components are usually cast from carbon or alloy steel.
At the initial stage, the workpieces are heated to the required temperature, which depends on the composition of the metal and the desired result. If this condition is not met, the quality of the finished material may decrease.
At the next stage, the slabs are sent to a rolling mill, with which the necessary size and shape are given to the steel billets. In appearance , the hot-rolled sheet may differ depending on the profile and rolls used in the production. Hot steel gets the required thickness in the process of moving through the rolling mill. At the same time, there are two production stages: draft and finishing. If cropping of uneven edges was not performed, then the hot-rolled sheet is classified in accordance with technical standards as unedged.