Method of forming dense ingots having a fine equiaxed grain stru

Metal working – Method of mechanical manufacture – With separating – localizing – or eliminating of as-cast...

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295275, 295276, 164122, 164125, 164136, B23P 1700

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active

047094613

ABSTRACT:
A method of forming a fine grained equiaxed ingot by melting metal and placing it in a mold having a restriction at the entrance disposed to solidify the metal in the entrance to the mold prior to complete solidification of the metal in the mold such that a shrinkage void is formed below the entrance to the mold. The ingot is then hot isostatically pressed (HIPped) to fully densify the ingot and eliminate the shrinkage void.

REFERENCES:
patent: 444381 (1891-01-01), Hinsdale
patent: 448881 (1891-03-01), Hinsdale
patent: 3570713 (1971-03-01), Tromel
patent: 4021910 (1977-05-01), Freeman, Jr. et al.
patent: 4054170 (1977-10-01), Kraai et al.
patent: 4580616 (1986-04-01), Watts

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