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Erschienen in: Metallurgist 1-2/2019

22.05.2019

Effect of Chemical Composition and Structure on Mechanical Properties of High-Strength Welding Steels

verfasst von: V. M. Goritskii, G. R. Shneiderov, I. A. Guseva

Erschienen in: Metallurgist | Ausgabe 1-2/2019

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Abstract

Based on the analysis of the Russian-made 4 to 16 mm thick rolled products produced by thermomechanical rolling from high-strength (yield point: 433 to 828 MPa) low-alloyed welding steels obtained as a result of 15 melting runs, the effect of chemical composition and structure on the mechanical properties, such as yield point, impact toughness, and impact toughness anisotropy factor, was studied. It was shown that the yield point of manganese steel (1.62–1.80 wt. % Mn) is mainly caused by microalloying with titanium, and to a lesser degree – with niobium and vanadium. An increase in the yield point of steel in excess of 700 MPa increases its tendency to impact toughness anisotropy. Within the concentration range from 0.001 to 0.08 wt. % Ti, the value of anisotropy factor Ka , which varies from 1.45 to 1.80, does not depend on Ti content, but increases sharply to Ka = 3.19 once the Ti content increases (in excess of 0.08 wt. %). A considerable negative effect of Nb content in steel on impact toughness (KCV– 40), measured on transverse specimens, has been established. A joint negative effect of Ti + Al on KCV– 40 is somewhat less pronounced. The presence of Al in the inclusions of complex composition (Ti-Al-Cr) noticeably reduces (by 4.5 times) the negative effect of Ti on KCV– 40 of highstrength manganese steel.

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Fußnoten
1
In steel marking, letter “S” denotes construction steel, while other letter symbols denote a manufacturer’s trademark, and three-digit numbers denote rated value of the steel yield point.
 
Literatur
1.
Zurück zum Zitat V. M. Goritskii, G. R. Schneiderov, and I. A. Guseva, “Effect of chemical composition and structure on mechanical properties of low-alloyed welding steels after thermomechanical rolling,” Metallurg, 5, 49–55 (2016). V. M. Goritskii, G. R. Schneiderov, and I. A. Guseva, “Effect of chemical composition and structure on mechanical properties of low-alloyed welding steels after thermomechanical rolling,” Metallurg, 5, 49–55 (2016).
2.
Zurück zum Zitat V. M. Goritskii, M. A. Lushkin, O. V. Goritskii, and G. R. Schneiderov, “Effect of structural factors on the impact toughness anisotropy of sheet metal made of ferrite-pearlite steels,” Deformat. i Razrush. Mater., 8, 16–21 (2014). V. M. Goritskii, M. A. Lushkin, O. V. Goritskii, and G. R. Schneiderov, “Effect of structural factors on the impact toughness anisotropy of sheet metal made of ferrite-pearlite steels,” Deformat. i Razrush. Mater., 8, 16–21 (2014).
3.
Zurück zum Zitat V. M. Goritskii, Thermal Embrittlement of Steels [in Russian], Metallurgizdat, Moscow (2007). V. M. Goritskii, Thermal Embrittlement of Steels [in Russian], Metallurgizdat, Moscow (2007).
4.
Zurück zum Zitat V. I. Ilyinskii, S. V. Golovin, P. R. Stepanov, et al., “Development of production technologies using rolling mill 5000 for pipeline designs with extreme parameters,” Metallurg, 8, 57–68 (2017). V. I. Ilyinskii, S. V. Golovin, P. R. Stepanov, et al., “Development of production technologies using rolling mill 5000 for pipeline designs with extreme parameters,” Metallurg, 8, 57–68 (2017).
Metadaten
Titel
Effect of Chemical Composition and Structure on Mechanical Properties of High-Strength Welding Steels
verfasst von
V. M. Goritskii
G. R. Shneiderov
I. A. Guseva
Publikationsdatum
22.05.2019
Verlag
Springer US
Erschienen in
Metallurgist / Ausgabe 1-2/2019
Print ISSN: 0026-0894
Elektronische ISSN: 1573-8892
DOI
https://doi.org/10.1007/s11015-019-00790-2

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