Study of Microstructure and Mechanical Properties of Boron-Containing Hot-Rolled Steel Reinforcement

Stiffened specifications for quality of reinforcement product are dictated by the contemporary market that is expressed in the introduction of new TU and GOST for manufactured products. When switching to the new GOST 34028–2016 enterprises are forced to abandon the use of traditional steel grades and switch to sparingly alloyed steel with expensive alloying elements (such as vanadium, niobium, molybdenum) with a lower carbon content. However, transition to new steel grades does not always provide the required level of properties and is often associated with an increase in production costs. Results are provided for a study of the structure and properties of A400C-class steel reinforcement made from a test melt in PAO Chelyabinsk Metallurgical Combine. During steel melting it was aimed at minimizing the number of expensive alloying elements and their partial replacement with boron. Results of the study show that microalloying steel with boron and using the standard manufacturing technology for hotrolled steel does not give unfavorable results for finished product properties and structure.