Thermomechanical processing of micro alloyed steels in Sartid A.D.: Part III - comparison of of Tnr temperatures determined on laboratory and industrial scale

Abstract

The aim of this work was to compare the Tnr temperatures of microalloyed steels estimated on laboratory (Tnr**l) and industrial scale (Tnr**l). Laboratory and industrial scale are related to testing on high temperature torsion machine, and calculation based on rolling mill log data obtained from SARTID six stand Hot Strip Mill (HSM), respectively. Obtained results are in good agreement, showing the difference of about 30°C. It is assumed that TnrL has higher value due to use of average values in simulation.

U radu su upoređene Tnr temperature dobijene u laboratorijskim (TnrL) i industrijskim uslovima (Tnr**l). U laboratorijskim uslovima Tnr**l temperatura je određena na uređaju za ispitivanje uvijanjem na povišenim temperaturama, a u industrijskim uslovima Tnr**l temperatura je određena na osnovu modela dobijenog analizom podataka sa završne pruge Tople valjaonice traka SARTID ad. Rezultati pokazuju dobro slaganje, uz napomenu da je Tnr**l viša od Tnr**l za oko 30 °C. Pretpostavljeno je da je razlika posledica korišćenja prosečnih vrednosti kojima je računala Tnr**l.