Metal founding – Means to shape metallic material – Continuous or semicontinuous casting
Reexamination Certificate
2006-04-18
2006-04-18
Tran, Len (Department: 1725)
Metal founding
Means to shape metallic material
Continuous or semicontinuous casting
Reexamination Certificate
active
07028748
ABSTRACT:
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 λKof 230 to 260 W/m·K, and the steel material should have a thermal conductivity λSof 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 λKof the copper material to thermal conductivity λSof the steel material of 6:1 to 8:1 has proven particularly favorable.
REFERENCES:
patent: 4936374 (1990-06-01), Pareg
patent: 5207265 (1993-05-01), Hasegawa et al.
patent: 5495886 (1996-03-01), Kolesnichenko
Kolbeck Dietmar
Maiwald Klaus
Wobker Hans-Günter
Kenyon & Kenyon LLP
KM Europa Metal AG
Tran Len
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