Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1988-03-09
1989-06-13
Seidel, Richard K.
Metal founding
Process
Shaping liquid metal against a forming surface
164475, 164423, B22D 1106
Patent
active
048383414
ABSTRACT:
Apparatus is provided for fabricating continuous metal strip composed of a low density, readily oxidizable aluminum based alloy. The alloy is cast directly from the metal through a slotted nozzle onto a moving chill substrate. A scraping mechanism located upstream of the nozzle is adapted to ride on the substrate and remove therefrom the gaseous boundary layer associated therewith. Disposed between the scraping mechanism and the nozzle is a gas supply mechanism adapted to introduce a replacement gas that is carried by the substrate to the nozzle. A shielding means configured to form a semi-enclosed chamber around the nozzle and the substrate apparatus to direct and confine the replacement gas in the vicinity of the nozzle. The alloy preferably has the form of a foil and a composition consisting essentially of about 10 to 13 weight percent silicon, 0 to 3 weight percent magnesium, 0 to 4 weight percent copper, 0 to 0.2 weight percent of at least one of bismuth, phosphorous, strontium, lithium, scandium, yttrium, sodium and calcium and 0 to 2 weight percent of at least one of the rare earth elements, the balance being aluminum and incidental impurities.
REFERENCES:
patent: 4177858 (1979-12-01), Liebermann
patent: 4262734 (1981-04-01), Liebermann
patent: 4718475 (1988-01-01), Das et al.
Adam Colin M.
Bose Debasis
Bye, Jr. Richard L.
Das Santosh K.
Datta Amitava
Allied Signal Inc.
Hampilos Gus T.
Seidel Richard K.
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