Obtaining high-quality properties of rolled material for large-diameter pipes based on formation of ferrite-bainite microstructure

The modern approach to development of chemical compositions for use in high-strength pipe steels (which calls for low carbon content (0.04–0.08%) and microalloying with niobium and small additives of Ni, Cu, Cr, and Mo) and advanced rolling processes (controllable rolling with accelerated cooling) c...

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Bibliographic Details
Published in:Metallurgist (New York) 2008, Vol.52 (1-2), p.21-28
Main Authors: Morozov, Yu. D., Nastich, S. Yu, Matrosov, M. Yu, Chevskaya, O. N.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Chromium
Cooling
Materials Science
Metallic Materials
Metallurgy
Microstructure
Pipe
Steels
Strength
Weldability
Welding
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Summary:The modern approach to development of chemical compositions for use in high-strength pipe steels (which calls for low carbon content (0.04–0.08%) and microalloying with niobium and small additives of Ni, Cu, Cr, and Mo) and advanced rolling processes (controllable rolling with accelerated cooling) can produce steel with fine ferrite-bainite microstructure. This type of microstructure means that it is possible to meet current requirements for strips and base metal used in large-diameter pipe — strength specifications similar to those for steel in strength classes K60 (Kh70)-K65 (Kh80), excellent cold resistance, and satisfactory weldability.
ISSN:0026-0894
1573-8892
DOI:10.1007/s11015-008-9003-5