The aim of this research was to establish the operating techniques of twin-roll casting in order to characterise the process itself and the cast products. The process has been studied using a "hot model" machine which casts 200 mm wide and 5 to 10 mm thick steel strip between two 660 mm diameter rolls. The three key points of the process are the control of the position of liquid pool end (which can only be achieved through comprehensive instrumentation and adequate automatisation), homogeneous liquid steel feeding and the use of side plates which prevent excessive solidification on strip edges. The extrapolation of the productivity achieved on the hot model has confirmed the industrial potential of twin-roll casting. Metallurgical characterisations have shown that for low carbon steel, a very low hot reduction ratio (about 2) is sufficient to achieve the mechanical properties of hot rolled strip or drawing quality cold rolled sheet. It is also found that for austenitic stainless steel, intermediate hot rolling is not necessary. These very encouraging results have now to be confirmed on a larger scale.
Bibliographic Reference: EUR 12154 FR (1989) MF, 86 pp., ECU 4, blow-up copy ECU 11.25
Record Number: 198911072 / Last updated on: 1994-12-01
Original language: fr
Available languages: fr