| 摘要 |
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<SUB>K </SUB>of 230 to 260 W/m.K, and the steel material should have a thermal conductivity lambda<SUB>S </SUB>of 30 to 40 W/m.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<SUB>K </SUB>of the copper material to thermal conductivity lambda<SUB>S </SUB>of the steel material of 6:1 to 8:1 has proven particularly favorable.
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