Cast-rolling plant

Details Cast-rolling plant Cast-rolling plant

B - Operations, Transporting

22

D

B22D 11/06 (2006.01) B22D 21/04 (2006.01)

Patent

CA 2492611

A plant for the continuous casting of aluminum strip, according to current construction type, has two counterrotating continuous casting rolls (1, 2), between which a casting gap (4) is formed. According to the present invention, the 1, continuous casting roll (1) is made of a copper material at least in its circumferential edge region, and the other, 2. continuous casting roll (2) is made of a steel material at least in its circumferential edge region. The copper material should have a thermal conductivity .lambda.K of 230 to 260 W/m.cndot.K, and the steel material should have a thermal conductivity .lambda.,s of 30 to 40 W/m.cndot.K. Rejecting the prevailing idea that casting can only be performed with two continuous casting roll materials of the same kind, so as to ensure uniform crystal growth, a continuous casting roll pairing of steel and copper is provided in the present invention. In order to ensure a qualitatively high value casting microstructure, the difference in the thermal conductivity of the continuous casting rolls should not exceed a factor from 5 to 9. A ratio of thermal conductivity .lambda.K of the copper material to thermal conductivity .lambda.s of the steel material of 6:1 to 8:1 has proven particularly favorable.

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