Method and apparatus for casting grain refined ingots

Details Method and apparatus for casting grain refined ingots Method and apparatus for casting grain refined ingots

1990-01-02

1990-11-27

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

164418, 164485, 1643381, 164900, 222592, B22D 2704, B22D 1110

Patent

active

049728997

ABSTRACT:
A method and apparatus for casting a grain refined ingot from a metallic melt supplied to a casting mold through a feed tube. The feed tube is provided with at least one cooling passageway through which a cooling fluid cyclically flows to form a zone of fine dendrites on the inner peripheral surface of the mold. An inductor is provided to reheat the zone of fine dendrites to detach dendrite arms into the melt which serve as nuclei for grain refinement as the melt solidifies into a cast ingot in the mold.

REFERENCES:
patent: 4577676 (1986-03-01), Watson
"Influence of Coarsening on Dendrite Arms Spacing of Aluminum-Copper Alloys", by Kattamis et al, Transactions of the Metallurgical Society of AIME, vol. 239, Oct., 1967, pp. 1504-1511.
"On the Origin of the Equiaxed Zone in Castings"by Jackson et al, Transactions of the Metallurgical Society of AIME, vol. 236, Feb. 1966, pp. 149-157.

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