B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/53, 75/70
B22D 11/06 (2006.01)
Patent
CA 1148718
ABSTRACT OF THE DISCLOSURE Casting side dam apparatus for use in a twin-belt continuous casting machine of the type wherein two spaced- apart side dams each revolve in a loop traveling along a casting zone from the input end to the output end of the casting zone and between a pair of revolving spaced-apart casting belts. The side dams return from the output end to the input end of the casting zone along a return path located away from the casting zone. The side dams each com- prise a multiplicity of slotted dam blocks strung on a flexible metal band. The dam blocks are each formed of a beryllium- copper alloy also comprising nickel, the beryllium being present in the alloy in excess of a trace but not more than 0.6% of the alloy, and the nickel in amount greater than the beryllium but not more than 2.1% of the alloy. The total of beryllium plus nickel plus copper is 99.5% minimum. The alloy is characterized by hardness in excess of the recommend- ed minimum of 90 Rockwell B and conductivity in excess of the recommended minimum of 35% IACS. The dam blocks are resistant to intergranular cracking over a prolonged period of exposure to elevated temperature as high as about 800°F., which is an elevated temperature to which the dam blocks are subjected in the operation of the Hazelett twin-belt casting machine for continuously casting copper. The dam blocks also are characterized by retaining their hardness in excess of 90 Rockwell B and conductivity in excess of 35% IACS over a prolonged period of exposure to the elevated temperature as high as about 800°F.
364770
Asarco Incorporated
Hewitt Neville S.
LandOfFree
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