Original scientific paper

Plastometric study of hot formability of hypereutectoid C – Mn – Cr – V steel

P. Kawulok ; VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
I. Schindler ; VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
R. Kawulok ; VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
S. Rusz ; VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
P. Opěla ; VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
J. Kliber ; VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
M. Kawuloková ; VSB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
Z. Solowski ; Třinecké železárny a.s., Czech Republic
K. M. Čmiel ; Třinecké železárny a.s., Czech Republic

Abstract

Formability of hypereutectoid C-Mn-Cr-V steel in hot condition was investigated with use of plastometric methods. A wide range of deformation temperatures 1 300 - 640 °C for hot tensile tests was proposed with use of nil-strength temperature (NST), determined by special plastometric method, and as well as with use of the calculated temperatures of phase transformations during heating of the investigated steel. Ultimate tensile strength of the investigated steel was increasing exponentially with the decreasing deformation temperature. Ductility of the investigated steel in hot condition increased with the increasing deformation temperature up to the temperatures ranging from 1 150 to 1 250 °C, after which a sharp decline of formability took place in investigated material.

Keywords

hypereutectoid steel; deformation; hot formability; mechanical properties in hot condition

Hrčak ID:

153621

URI

https://hrcak.srce.hr/153621

Publication date:

1.7.2016.

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