Metal treatment – Compositions – Heat treating
Patent
1982-03-30
1983-11-15
Rutledge, L. Dewayne
Metal treatment
Compositions
Heat treating
148 115A, 148 115C, 148437, 148432, C22F 104, C22F 108
Patent
active
044153740
ABSTRACT:
A fine grained metal composition suitable for forming in a partially solid, partially liquid condition. The composition is prepared by producing a solid metal composition having an essentially directional grain structure and heating the directional grain composition to a temperature above the solidus and below the liquidus to produce a partially solid, partially liquid mixture containing at least 0.05 volume fraction liquid. The composition, prior to heating, has a strain level introduced such that upon heating, the mixture comprises uniform discrete spheroidal particles contained within a lower melting matrix. The heated alloy is then solidified while in a partially solid, partially liquid condition, the solidified composition having a uniform, fine grained microstructure.
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Courtois James A.
Kyonka Curtis P.
Young Kenneth P.
Holt Harold J.
International Telephone and Telegraph Corporation
McDowell R.
Raden James B.
Rutledge L. Dewayne
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