Production of rolled steel and large-diameter pipes of K70 and K80 strength classes

The article presents a detailed examination of the production of rolled steel and large-diameter pipes for gas pipelines, focusing on strength classes K70 and K80. It explores the necessity of developing high-strength steels to meet the demands of increased operating pressures in gas pipelines, particularly in challenging climatic conditions. The study delves into the metallurgical approaches and technological solutions required to achieve the desired mechanical properties, including strength, ductility, and fracture resistance. A key aspect of the research is the development of thermomechanical controlled rolling technology (TCRT), which involves mathematical modeling and simulation of metallurgical processes to optimize structural formation. The article also discusses the rigorous testing and validation processes, including impact toughness and crack resistance tests, to ensure the reliability and performance of the produced pipes. The findings highlight the successful development of industrial technology for producing rolled steel and electric-welded pipes, meeting the stringent requirements for gas pipeline applications. The research provides valuable insights into the structural formation and mechanical properties of high-strength steels, making it a significant contribution to the field of advanced pipeline technologies.