Method of reducing the pore density in a casting

Details Method of reducing the pore density in a casting Method of reducing the pore density in a casting

C - Chemistry, Metallurgy

21

D

148/55.5

C21D 1/53 (2006.01) B22D 31/00 (2006.01) C21D 8/00 (2006.01)

Patent

CA 1239852

- 10 - ABSTRACT OF THE DISCLOSURE A casting (e,g, of aluminum or aluminum alloy) is made at least approximately free from pores by being subjected, in heated state, to isostatic compression in a liquid pressure medium. A rapid pressing operation of under one minute can be achieved if the casting is placed in a container, the container and the casting are heated to the required compression temperature before they are thereafter placed in a press chamber of a fast-acting press. When liquid pressure medium is fed to the press chamber and the necessary pressure is applied thereto, the pressure medium flows into the interior of the con- tainer via a number of channels in its wall and is simul- taneously heated to the necessary temperature, prior to its contacting the casting.

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