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Metallurgist

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10.05.2021

Effect of Preliminary Deformation of Continuously Cast Billets by Radial-Shear Rolling on the Structure and Properties of Hot-Rolled Chromium-Containing Steel Pipes

verfasst von: S. P. Galkin, A. S. Aleschenko, B. A. Romantsev, Yu. V. Gamin, R. V. Iskhakov

Erschienen in: Metallurgist | Ausgabe 1-2/2021

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Abstract

The paper analyzes the effect of preliminary deformation of continuously cast billets (CCB) made of chromium-containing grades of steel by radial-shear rolling (RDR) on the structure and properties of seamless pipes. A bar stock measuring 105 mm in diameter was obtained using an RDR mill at large feed angles (β = 21°). A comparative analysis of the microstructure of the initial CCB and hotrolled bars has shown that radial-shear rolling enables intensive refinement of the structure of continuously cast billets, and ensures a high-quality (70 to 90%) work-up of the cast structure at reduction ratios of 2.0 to 2.2. A pipe-rolling mill (PRM) installed at the Pervoural’sk New Pipe Plant JSC (PNPP JSC) was used to obtain seamless pipes from the deformed bars, and the mechanical properties of such pipes were studied. It was found that the pipes obtained from the experimental billets are fully compliant with the ISO 11960:2004 requirements for strength group J55 (σ_t > 517 MPa; σ_0.2 > 379 MPa; δ > 16%). In addition, the level of plastic properties of the experimental pipes (based on present elongation δ₅, %) exceeds the ISO 11960:2004 requirements by 1.6–1.8 times. To achieve a comparable level of properties using the existing technology, an additional heat treatment (HT) is required, which points to the potential advantages of using RDR pre-deformed billets to obtain seamless pipes with the required properties.

Vorheriger Artikel Analysis of Electrical Conditions of Electric Arc Furnaces during Different Periods of Melting

Nächster Artikel Investigation and Development of Technological Parameters for the Vacuum Melting of Corrosion-Resistant Refractory Nickel Alloys

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Titel: Effect of Preliminary Deformation of Continuously Cast Billets by Radial-Shear Rolling on the Structure and Properties of Hot-Rolled Chromium-Containing Steel Pipes
verfasst von: S. P. Galkin
A. S. Aleschenko
B. A. Romantsev
Yu. V. Gamin
R. V. Iskhakov
Publikationsdatum: 10.05.2021
Verlag: Springer US
Erschienen in: Metallurgist / Ausgabe 1-2/2021
Print ISSN: 0026-0894
Elektronische ISSN: 1573-8892
DOI: https://doi.org/10.1007/s11015-021-01147-4

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