Abstract
The effect of defects in the structure of a slab on the set of properties of sheet steel 07G2FBYu used for large-diameter electrically welded pipes for oil and gas pipelines is investigated. The structure and content of nonmetallic inclusions are studied at the edges and in the middle of slabs. Types of inclusions are determined. The effect of the mode of double hardening and high-temperature annealing on the microstructure of the steel is analyzed, including its variation over the sheet width. Changes in the strength, ductility, and resistance to brittle fracture, stress corrosion, sulfurated hydrogen corrosion, and hydrogen-stress cracking are considered. A hypothesis that the stress-corrosion cracking in electrically welded pipes serving in pipelines depends on the contamination of the edge zone of the sheet steel with nonmetallic inclusions is considered.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
