Thyssen Stahl Ag

Usinor Sacilor

Thyssen Stahl Aktiengesellschaft of Duisburg

Usinor of Puteaux

Olivier Salvado

Luc Vendeville

Yann Breviere

Francois Mazodier

Gilles Fellus

Yves Leclercq

Jean-Michel Damasse

Process for detecting defects during continuous casting between rolls where, during casting, a signal depending on the rolls separating force (RSF) is measured, the signal being separated into various harmonic components, the result of the comparison of the harmonic components thus obtained with reference harmonics being representative of a defective status of the rolls, this defective status of the rolls enabling various rules to be defined for the execution of the process.

Continuous casting process between rolls

Control process for twin-roll continuous casting, in which, during casting, the roll separation force (RSF) is measured and the position of the bearings of at least one of the rolls is varied in order to increase or decrease the center-to-center spacing of the rolls, with a view to keeping the force substantially constant, a band (.DELTA.RSF) of force values bracketing a desired nominal force (RSF.sub.0) is predetermined and the position of the bearings is varied more sharply when the value of the measured force lies outside the band than when it lies within the band. Application especially to the twin-roll continuous casting of thin steel strip.

Control process for twin-roll continuous casting

Growing community of inventors

Thorigny, France

Olivier Salvado