Providing steel with an approximate application of the mechanical properties of wire rod 5.5-6.5 mm from sreel grades 70-75 based on a conventional twin of the Stelmor process

the air-cooling line of Mill of PJSC MMK (Magnitogorsk Iron and Steel Works) was upgraded. The main task of modernization was to obtain wire rod sorbitized in the initial state. The use of such products makes it possible to abandon one intermediate heat treatment operation in the wire production process, and should also ensure the stability of the mechanical properties of the finished wire of the entire size range of OJSC MMK-METIZ. On the part of OJSC MMK-METIZ, the following high requirements were imposed on the uniformity of the mechanical properties of the wire rod obtained at the mill - no more than 40 N/mm 2 along the length of the convolution, 50 N/mm 2 along the length of the coil, 60 N/mm 2 within the melt. When analyzing samples of rolled products from steel grades 70-75 with a diameter of 5.5-6.5 mm, it was found that compliance with the requirements in the modes operating at the mill is difficult. on the development of wire rod production technology using a digital twin of an air cooling line, a mathematical model was developed, the adequacy of which was proved by developing rolling modes based on it, followed by evaluation of the resulting product. Upon further analysis of the obtained rolled products, it was found that the products manufactured according to the new modes meet the requirements for uneven mechanical properties along the length of the convolution and the coil to a greater extent.