The Microstructural Properties of Microalloyed Steel after Plastometric Testing


Article Preview

With the aid of an ASC-type finishing line (Automatic System Control) and continuous cooling of the rolled stock in water boxes, modern continuous light mills enable thermomechanical (controlled) rolling of SBQ-type rods (Special Bar Quality). During the thermomechanical forming (at different temperatures or cooling rates etc.), one can analyze the quality parameters of roundsection steel bars. In order to obtain better understanding to the forming conditions (temperature, strain and strain rate) and the possibility of cooling (related to its rate and time), an experiment involving continuous and discontinuous testing by means of a Gleeble plastometer was suggested. After its implementation, the attention was focused on the mathematical interpretation of the stressstrain characteristics of the steel and on metallographic observation of microstructural changes. The results achieved are of universal meaning and contribute to the theoretical understanding of controlled forming.



Materials Science Forum (Volumes 567-568)

Edited by:

Pavel Šandera




T. Gajdzica et al., "The Microstructural Properties of Microalloyed Steel after Plastometric Testing", Materials Science Forum, Vols. 567-568, pp. 373-376, 2008

Online since:

December 2007




[1] R. Turoň et al: Simulation of Controlled Rolling of Selected Structural Steels under Varied Thermal Conditions. In METAL 2005, Hradec nad Moravicí (CZ), (2005).

[2] M. Kotas et al: Computer-Based and Plastometric Simulation of Controlled Rolling of Microalloyed Steels. In METAL 2006, Hradec nad Moravicí (CZ), (2006).

[3] K. Čmiel, J. Kliber: Control rolling of high carbon wire rod. In METAL FORMING 2002, Krakow (PL), (2002).

[4] J. Kliber, O. Žáček: Simulation of Thermodynamical Conditions in a Selected Microalloyed Steel. 2005 report on the Research into, Development and Introduction of Rolled Steel Bars research assignment, Ostrava (CZ), (2006).

[5] J. Kliber: Simulation of forming processes by plastometric tests. In Trans. of VŠB - TUO, Metallurgical Series 1, Ostrava (CZ), (1997).

[6] K. Čmiel: Simulation of Thermomechanical Rolling on a Continuous Wire Rod Mill. Doctoral thesis, VŠB-TU Ostrava, Department of Forming of Materials, Ostrava (CZ), (2002).