Metal treatment – Process of modifying or maintaining internal physical... – With casting or solidifying from melt
Patent
1998-05-07
1999-06-29
Simmons, David A.
Metal treatment
Process of modifying or maintaining internal physical...
With casting or solidifying from melt
148552, 148690, 148695, 148699, 420530, C22F 104
Patent
active
059163852
ABSTRACT:
An essentially lead-free aluminum alloy is provided for extruded screw machine stock. The alloy consists essentially of from about 4.5% to about 6% copper, a maximum of about 0.4% silicon, a maximum of about 0.7% iron, not more than about 0.3% zinc, from about 0.1% to about 1% bismuth, from about 0.1% to about 0.5% tin, balance aluminum and unavoidable impurities. The screw machine stock is prepared by extruding a homogenized billet to the desired shape, then the shape is subjected to a thermomechanical treatment involving at least one heat-treatment and cold working.
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patent: 5122208 (1992-06-01), Alabi
patent: 5194102 (1993-03-01), Wyss
Metals Handbook: Desk Edition; Boyer & Gall, editors; Amer. Soc. for Metals, Metals Park, Ohio; pp. 6-8 to 6-11, 6-24, 6-25, 6-28, and 6-30, 1985.
Coats, II Norman LeRoy
Farrar, Jr. Larry Eugene
Haynes Gerald D.
Kaiser Aluminum & Chemical Corporation
Koehler Robert R.
McGarrigle Philip L.
Simmons David A.
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