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Metallurgist

Erschienen in:

01.05.2012

Effect of ferrite-bainite structure on the properties of high-strength pipe steel

verfasst von: M. A. Smirnov, I. Yu. Pyshmintsev, A. N. Maltseva, O. V. Mushina

Erschienen in: Metallurgist | Ausgabe 1-2/2012

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Abstract

Mechanical properties of pipe steel 07G2MFB are studied after cooling from the austenitic region at rates of 0.9–32°C/sec making it possible to obtain a ferrite-bainite structure with different ratios of structural components. It is shown that formation of a predominantly bainitic structure formed with high cooling rates provides less crack resistance with static loading than a structure in which polygonal ferrite predominates. A bainitic structure is preferable with dynamic loading. Treatment leading to formation of coarse islands of martensite-austenite (MA) component within a ferrite-bainite structure has an unfavorable effect on crack tip opening displacement CTOD, ductile-brittle transition temperature T₅₀, and resistance to hydrogen embrittlement ∆Ψ/Ψ.

Vorheriger Artikel Dependence of the surface deformation of strip on the parameters of its shaping

Nächster Artikel Relationship of failure energy and amount of ductile component in a fracture during the DWTT for rolled plate prepared by controlled rolling

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Naming of different structural components for low-carbon pipe steels was given by the authors in [3].

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M. A. Smirnov, I. Yu. Pyshmintsev, and A. N. Boryakova, “Classification of low-carbon pipe steel microstructure,” Metallurg, No. 7, 45–51 (2010).

M. A. Smirnov, V. M. Schastlivtsev, and L. G. Zhuravlev, Bases of Steel Heat Treatment [in Russian], URO RAN, Ekaterinburg (1999).

V. M. Schastlivtsev, T. I. Tabatchikova, I. A. Yakovleva, et al., “Features of the structure of bainite in low-carbon weldable steels after thermomechanical treatment,” Vopr. Metal., No. 3, 26–38 (2009).

V. I. Bolshakov, G. D. Sukhomlin, and V. N. Kuksenko, “Study of the fine structure of acicular ferrite. Part 2,” Metal. Term. Obrab. Metallov, No. 10, 3–9 (2009).

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I. Yu. Pyshmintsev, A. N. Maltseva, A. M. Gerasiev, et al., “Structure and properties of low-carbon pipe steels subjected to pneumatic tests,” Stal, No. 2, 75–81 (2011).

W. K. Kim, S. U. Koh, K. Y. Kim, and B. Y. Yang, “The effect of metallurgical factors on HIC of high-strength line pipe steel,” NACE Int. Corrosion Conf. and Expo, Houston, USA (2007), Paper No. 07500.

10.

I. V. Gorynin, V. V. Rybin, V. A. Malyshevskii, and E. I. Khlusova, “Alloying principles, phase transformation, structure and properties of cold-resistant weldable shipbuilding steels,” Metalloved. Term. Obrab. Metallov, No. 1, 9–15 (2007).

11.

E. I. Khlusova, V. V. Orlov, A. A. Kruglova, and S. V. Korotkovskaya, “Effect of structural component morphology on mechanical properties of bainitic steel for main pipelines of strength category K65(Kh80),” Probl. Chern. Met. Materialoved., No. 4, 24–30 (2010).

Titel: Effect of ferrite-bainite structure on the properties of high-strength pipe steel
verfasst von: M. A. Smirnov
I. Yu. Pyshmintsev
A. N. Maltseva
O. V. Mushina
Publikationsdatum: 01.05.2012
Verlag: Springer US
Erschienen in: Metallurgist / Ausgabe 1-2/2012
Print ISSN: 0026-0894
Elektronische ISSN: 1573-8892
DOI: https://doi.org/10.1007/s11015-012-9534-7

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