Metal treatment – Compositions – Heat treating
Patent
1986-08-13
1988-06-28
Zimmerman, John J.
Metal treatment
Compositions
Heat treating
148 115Q, 148415, 148 2, 148440, 428614, C22D 104
Patent
active
047536900
ABSTRACT:
Reinforced composite aluminum-matrix articles containing up to 20%, by volume, silicon carbide fibers or particles, are produced by a casting process wherein about 4% to about 7%, by weight, of magnesium is included in the aluminum matrix alloy to facilitate wetting of the reinforcing material and ready dispersal thereof with the matrix alloy while the alloy is completely molten and thereafter hot working the composite at a temperature between the liquidus and solidus temperatures of the aluminum alloy matrix. The matrix is characterized by a microstructure wherein fine precipitates appear in the vicinity of SiC particles or fibers, and by high hardness and strength without further heat treatment.
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Adenis Daniel J.
Cox Thomas B.
Wada Tsuguyasu
Amax Inc.
Ciomek Michael A.
Kalil Eugene J.
Zimmerman John J.
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