Mechanical behaviour of steel slabs in the secondary cooling zone of the continuous casting process
This report presents a theoretical and experimental study of the mechanical behaviour of slabs at solidification under industrial continuous casting conditions. The theoretical study consists of the development of a mathematical model of slab bulging on a series of rolls where support system geometry defects could be simulated. A visco-plastic type mechanical behaviour law for steel is chosen, taking into account the cyclical character of the deformations undergone by the solidified shell. The following principal results are obtained using this mathematical model: A support system geometry anomaly (misalignment, roll eccentricity, or an increase of roll pitch) is transmitted along several intervals of downstream rolls. Such a deviation of geometry brings about an increase in the maximum bulging deflection between the rolls and amplifies the deformations induced in the solidified shell. The trials show that a force sensor positioned in a roll bearing can detect a roll geometry anomaly situated at least four intervals upstream from the sensor. A control of the geometrical state of the continuous casting in real time can be contemplated because of this result.
Bibliographic Reference: EUR 12120 FR (1989) MF, 106 pp., ECU 8, blow-up copy ECU 13.75
Record Number: 198910721 / Last updated on: 1994-12-01
Original language: fr
Available languages: fr